General Volcanic Activity Thread!

[john pike]

Volcanoes Today, 9 Apr 2014: Etna, Tungurahua, Ubinas

Wednesday Apr 09, 2014 10:00 AM |

Thermal image of Etna's eastern flank with the New SE crater (Monte Cagliato thermal webcam, INGV Catania)

Tungurahua volcano emitting an ash plume this morning

Etna (Sicily, Italy): After a few days of bad weather that have prevented detailed observations, it seems that all is quiet again.

Tremor is slightly above normal background levels.

A new short pause or the end of activity?

Tungurahua (Ecuador): Smaller explosions and moderate ash emissions continue at the volcano.

After the larger explosion last Friday had apparently cleared the conduit, magma is able to rise more easily to the summit and produce mild to moderate strombolian activity.

Ubinas (Peru): Smaller explosions continue at the volcano.

[john pike]

Volcanic activity worldwide 10 Apr 2014: Fuego, Tungurahua, Sinabung, Paluweh, Santa María / Santia...

Thursday Apr 10, 2014 17:56 PM |

Evolution of Sinabung volcano's lava extrusion lobe (VSI)

Incandescent avalanche at Colima on 4 April (photo: Sergio Tapiro Velasc)

Small explosion at Popocatépetl this morning (CENAPRED)

Current seismic signal from Pacaya (PCG station, INSIVUMEH)

Fuego this afternoon

Strombolian activity at Tungurahua last evening (photo courtesy: Bastien Poux)

Sinabung (Sumatra, Indonesia): Activity continues at the volcano in form of slow lava extrusion that feeds the thick lobe formed on the southern flank. Overall, the intensity of this activity continued to decrease. Authorities decreased the alert status from the highest (4) to 3 (on a scale of 1-4).

People from some of the evacuated areas (to the E and NE) have been allowed to return to their homes where the process of cleaning up the ash is in full progress. Only the areas within 3 km radius and several villages in the SE sector, namely Sukameriah and Beras Tapu, where the fatal pyroclastic flow on1 February claimed victims, remain off limits.

Although the effusion rate has dropped, which is also indicated by reduced seismic and rockfall activity, including the disappearance of hybrid earthquakes as indicator of deep magma supply, some magma continues to erupt and the lobe continues to grow. It is best considered a large unstable mass draped onto the steep slope of the volcano. The risk of a sudden collapse with a resulting, potentially devastating pyroclastic flow remains.

Paluweh (off Flores Island, Indonesia): The Indonesian Volcanological Survey (VSI) has lowered the status of the volcano from 3 to 2 (on a scale of 1-4), after no new significant activity has been detected at the volcano in recent months.

Seismicity also has decreased since the last week explosions and avalanches that were noticed from the new lava dome in last November.

Dukono (Halmahera): Activity remains elevated. An ash plume was seen on satellite imagery drifting at estimated 6,000 ft (1.8 km) altitude 40 nautical miles to the E (VAAC Darwin) today.

Colima (Western Mexico): Weak explosive and effusive activity continues at the slowly growing viscous lava dome of the volcano. Occasionally, explosions and/or small rockfalls from the dome produce incandescent avalanches that reach 1-2 km distance on the steep slope. ####

Popocatépetl (Central Mexico): Activity at the volcano remains essentially unchanged and relatively low. CENAPRED reported 48 weak emissions and small explosions during the past 24 hours. Some of them ejected small amounts of incandescent material up to 100 m distance from the crater.

Glow from the crater remains visible at night, suggesting that lava continues to extrude slowly.

Santa María / Santiaguito (Guatemala): Activity has not changed much over the past weeks. The observatory reports moderate explosions ejecting gray ash plumes rising up to about 800 m and causing light ash falls in areas to the west of the lava dome.

Pacaya (Guatemala): Weak sporadic explosions have resumed at the Mackenney crater. Fine ash plume were observed rising to 2,6 km altitude and drifting approx. 1 km to the S and SW. The seismic signal shows continuous tremor and weak explosion signals.

Fuego (Guatemala): The volcano observatory reports an increase in activity early this morning. The number and size of explosions increased to an average of 6-8 per hour. Ash plumes rose to almost 1 km height and drifted W and SW for about 10 km.

All explosions were accompanied by loud detonations that could be heard and felt in up to 15 km distance. Incandescent material falling back onto the slopes causes avalanches into the Santa Teresa, Ceniza and Trinidad drainages.

Tungurahua (Ecuador): An explosion occurred yesterday morning at 02:28 local time and was followed by a new phase of lava fountaining and strombolian explosions accompanied by continuous tremor. The detonation sounds were heard like cannon-shots in all directions away from the volcano including the city of Ambato and the volcano observatory. Incandescent material descended the flanks up to 2 km distance. Ash falls were reported in the towns of Manzano and Cahuají Choglontús.

A peak of activity was noted at about 5 am. After 9 am, intensity decreased, but gained strength again at 13:00. Some of the explosions were described as very strong. The explosive activity remained very strong all the afternoon until the evening, our reader Bastien Poux reported. This morning the volcano was in the clouds.

The observatory measured a significant increase in SO2 emissions: 1769 tons on 6 April, 4176 tons on 7 April and 9946 tons on 8 April. This is consistent with a new batch of magma that has been rising into the currently open-conduit system of the volcano. Deformation measurements also suggest that new magma injections have been taking place.

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[john pike]

Tjörnes Fracture Zone volcano

Current status: restless (2 out of 5)

 

The offshore Tjörnes Fracture Zone is an oblique transform zone that separates the northern volcanic zone of Iceland from the Kolbeinsey Ridge, part of the Mid-Atlantic Ridge north of Iceland.

Background:

A submarine eruption was reported during 1867-1868 at the SE part of the fissure system off the northern coast of Iceland along the Manareyjar Ridge immediately north of Manareyjar Island.

 

http://www.volcanodiscovery.com/tjoernes-fracture-zone.html

 

 

http://volcanodiscovery.com/tjoernes-fracture-zone-earthquakes.html

 

swarm still ongoing

 

will update when more info comes through ( whether plate or volcanic)

[john pike]

Volcano Activity in Democratic Republic of the Congo on Friday, 11 April, 2014 at 04:02 (04:02 AM) UTC.

 

The Nyamulagira volcano is currently in highly intense activity that can lead to a blowout in the coming days of next week, said an expert Thursday in Goma, a city in the eastern Democratic Republic of the Congo. "The eruption of Nyamulagira will have no impact on the famous volcano Nyiragongo, whose activity is in a normal state," said Kaco Karume, member of the Volcanic Observatory of Goma (OVG). Karume reassured local residents that they will be informed of the evolution of the volcano. The Nyamulagira volcano is located 22 km north of Goma, capital of North Kivu province. According to a member of the security of Virunga National Park, assigned to the Congolese Institute for Nature Conservation (ICCN), the volcano poses no threat to mountain gorillas and other animals that live there. Recent eruptions of Nyamulagira date back to November 2011 and January 2010.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20140411-43327-COG

 

nyamuragira volcano

Nyamuragira, a large shield volcano similar to Mauna Loa on Hawai'i, is one of Africa's most active volcanoes. Every few years, it produces eruptions often from radial fissures emitting lava fountains and large, fluid lava flows travelling many kilometers into the scarsely populated area of tropical forest and farmland surrounding it.

Shield volcano 3058 m / 10,033 ftDRCongo, -1.41°S / 29.2°E

 

http://www.volcanodiscovery.com/nyamuragira/news/43859/Nyamuragira-volcano-DR-Congo-eruption-warning.html

Edited April 11, 2014 by john pike

[john pike]

Etna volcano updates and eruption news:

Etna volcano update:

Friday Apr 11, 2014 10:40 AM | BY: EMANUELA

Partial collapse on the NE flank of the New SE crater (Etna Trekking webcam on Schiena dell'Asino)

A small event this morning at 08:09 (local time) from the New SE crater produced a reddish-brown ash plume generated by partial collapse on the eastern flank of the cone

[*]All news about: Etna volcano

[*]Information about: Etna volcano

 

 

 

 

 

 

 

 

http://www.volcanodiscovery.com/etna/news/43853/Etna-volcano-update-.html

[john pike]

Bagana volcano: news and activity updates

latest (2014) | 2013 | 2012 | archive

Friday, Apr 11, 2014

Bagana volcano (Bougainville Island, Papua New Guinea): magnitude 7.2 earthquake

A major magnitude 7.2 earthquake struck 50 km south of the volcano today.

 

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_last&rid=398625

Edited April 11, 2014 by john pike

[john pike]

Volcanoes Today, 12 Apr 2014: Fuego, Nyamuragira, Ubinas, San Cristobal

Saturday Apr 12, 2014 11:00 AM |

Strong explosion from Fuego this morning (INSIVUMEH)

Forcasted ash from San Cristobal volcano (VAAC Washington)

Explosion at Ubinas yesterday (IGP)

MODIS hot spot at Nyamuragia (single spot in center) and Nyiragongo (large spot bottom) volcanoes (ModVolc, Univ. Hawaii)

Fuego (Guatemala): Activity at the volcano continues to increase and could be heading towards a new paroxysm with lava flows, strong explosions and potential pyroclastic flows. Constant avalanches were observed on the upper southern flank, which could be related to the opening of an effusive vent.
The increased rise of magma to the crater has been producing stronger and more frequent explosions, at averages of 8 per hour reported in last night's special bulletin of the volcano observatory.
Incandescent lava fragments could be ejected to more than 1 km distance, judging from webcam images. Ash plumes rose to more than 1 km height, drifting west and southwest, where ash fall occurred in Panimaché, Sangre de Cristo and other villages

Moderate to strong rumblings were audible in more than 15 kilometers distance and shock waves rattled roofs and windows of houses.

San Cristobal (Nicaragua): A small eruption probably occurred last evening. VAAC Washington issued an alert against a possible ash plume at 8,000 ft (2.4 km) altitude drifting west of the volcano.
The seismic signal shows an increased tremor signal today and the numerous aftershocks of the recent magnitude 6 earthquakes near Lake Managua.

Ubinas (Peru): Activity at the volcano has been increasing over the past week, both the number and size of explosions and the corresponding seismic activity. Explosions on 9 April produced ash plumes that reached up to 3 km height, which is a significant increase compared to the smaller ones that had been occurring previously with 1.5-2 km tall plumes. Light ash fall occurred in areas to the NE, in areas up to 20 km distance including the villages Lloque, Chojata, and Ichuna.
For the first time in the current eruption, incandescent lava fragments up to 20 cm in size were ween seen during 7-8 April. They were ejected to distances of up to 1 km from the crater.

Time-lapse video of yesterday's activity:
An average of 107 hybrid and 257 long-period earthquakes per day were detected. These are indicators of magma reaching the surface and internal fluid movements.

 

 

Nyamuragira (DRCongo): No confirmation whether a new eruption at the volcano has started is available yet, but MODIS satellite data show a thermal hot spot near the NE rim of the summit caldera and a strong SO2 plume is being detected coming from the area.
However the latter could be entirely be coming from neighboring Nyiragongo volcano with its large active lava lake, so the situation remains unclear. Edited April 12, 2014 by john pike

[john pike]

Ubinas volcano (Peru): increasing explosive activity with incandescent lava, preparations for evacuations

http://www.volcanodiscovery.com/ubinas/news/43881/Ubinas-volcano-Peru-increasing-explosive-activity-with-incandescent-lava-preparations-for-evacuation.html

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20140412-43339-PER

[john pike]

Volcanoes Today, 13 Apr 2014: Popocatépetl, Momotombo, Karymsky, Dukono

Sunday Apr 13, 2014 10:00 AM |

Small explosion at Popocatépetl yesterday morning (CENAPRED)

Current seismic signal at Momotombo volcano (MOMN station, INETER)

Karymsky (Kamchatka): An eruption yesterday evening produced an ash plume that rose to estimated 14,000 ft (4.2 km) altitude.

Dukono (Halmahera): Ash plumes from stronger (probably strombolian-type) explosions are regularly spotted on satellite imagery by VAAC Darwin.
The semi-permanently erupting volcano apparently continues to be in a relatively elevated phase of activity.

Popocatépetl (Central Mexico): A slight increase of activity (but no significant change) was reported by CENAPRED. During 11-12 April, the volcano had 120 exhalations of small to medium intensity, some of which have been followed by emissions of steam, gas and sometimes small amounts of ash.
The most important of these were recorded yesterday morning at 02:19 and at 04:55 h (local time). The latter explosion threw some incandescent fragments to distances of approx. 100 m onto the upper eastern slope.

Gas-steam emissions remain elevated, sometimes producing a plume rising 1 km. Incandescence is visible at night from the slowly growing lava dome.


Momotombo (Nicaragua): Seismicity in the volcanic chain between Momotombo and Apoyeque volcanoes remains high. Dozends of shallow earthquakes in the magnitude 3-5 range have been occurring daily in a cluster SE of Momotombo and near Apoyeque.
There are no reports of unusual activity at either volcano.

Edited April 13, 2014 by john pike

[john pike]

Ubinas volcano (Peru): activity increases, constant ash emissions and explosions

Monday Apr 14, 2014 18:09 PM | BY: T

Ash emission from Ubinas this afternoon

The volcano's activity increases. As more magma arrives to build up the new lava dome in the summit crater, more gasses are being released as well and cause near-constant explosive activity with moderately strong ash emissions at the moment (see video).

 

VAAC Buenos Aires reported an ash plume at 28,000 ft (8 km) altitude drifting NW.

[john pike]

Volcanic activity worldwide 14 Apr 2014: Hekla, Ubinas, Fuego, Reventador, Tungurahua

Monday Apr 14, 2014 18:35 PM |

Earthquakes in southern Iceland during the past 48 hours

A typical strombolian eruption at Fuego yesterday morning

Current seismic signal from Reventador (CONE station, IGPEN)

Explosion at Tungurahua volcano this afternoon

Ash emission from Ubinas this afternoon

Hekla (Iceland): A shallow (around 8 km depth) earthquake swarm including two quakes at 2.7 and 2.9 magnitude has started in an area 12 km to the south of Hekla volcano.

Latest GPS measurements suggest a slight trend of inflation is occurring as well, which could be related to magma intrusion into shallow magma chambers.

We don't know whether these earthquakes are volcanic in origin or could be a precursor to a new eruption in a near future (probably not). On the other hand, since one is being considered "due" by many scientists, it would not be very surprising either.

 

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/myrdalsjokull/

Fuego (Guatemala): The volcano has returned to normal levels of activity without producing a new paroxysm when activity climbed during 10 April. Intermittent explosions of strombolian type and small to moderate size were heard during the past 24 hours, but could not be directly observed due to cloud cover.

Reventador (Ecuador): Activity continues at moderate levels with small intermittent explosions, but (probably) no longer active lava flows.

Most of the time, the volcano is hidden in clouds, but this activity can be inferred from seismic and satellite data.

Tungurahua (Ecuador): Activity decreased during 12 April, but has quickly picked up again. The volcano continues to show intermittent small to moderate vulcanian explosions with ash emissions of up to 3 km above the crater, accompanied by loud detonations and shock waves. In addition, strombolian activity were reported by the observatory.

Lava blocks rolled down on the southern flanks of the volcano to distances of approx. 1 km. No reports of ash fall were received.

The lava flow from 10-11 April appears to have stopped.

Edited April 14, 2014 by john pike

[john pike]

Nyamulagira volcano in North Kivu province in the east of the Democratic Republic of Congo (DR Congo) has began emitting fumes and ashes, the local press said on Sunday, citing the director of Goma Volcanic Observatory Kaco Karume. "Given the intense fumes from Nyamulagira volcanic crater, it will soon erupt," Karume said after inspecting the volcanic site. North Kivu governor Julien Paluku who also inspected Nyamulagira volcano and its environs, said Goma town will be spared from the imminent eruption. He urged the population to take precautionary health measures given the volcanic fumes and ashes that were blowing in different directions. On Thursday last week, Goma Volcanic Observatory said the eruption of Nyamulagira volcano could happen in a matter of days.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_update_read&edis_id=VA-20140411-43327-COG&uid=14825

[john pike]

The UN mission in Democratic Republic of Congo said Monday it will provide support in monitoring the Nyamulagira volcano whose activities are becoming intense. "MONUSCO has offered its assistance to the authorities of North Kivu and is committed to working closely with officials to this new challenge. Such assistance will granted in a timely manner as soon as the need arises," said Martin Kobler, head of the United Nations Organization Stabilization Mission in Democratic Republic of Congo. Provincial authorities confirmed Sunday that intense activity was noticed at Nyamulagira volcano. MONUSCO experts investigated the volcano Sunday afternoon. They reported dense smoke rising from the crater, but no lava flow was observed.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_update_read&edis_id=VA-20140411-43327-COG&uid=14828

[jonboy]

Hi John a general question would you say that we are seeing an increase in volcanic activity say compared with the last 5 years or so or are we generaly at the same level of activity?

[john pike]

http://mobile.volcanodiscovery.com/erupting_volcanoes.html

 

hi jon

 

i certainly see an increase but more from 2012 onwards

 

my count this year is 32 so far

 

the link shows 38 current eruptive state

 

and scores showing unrest

 

getting actual amounts on line is very difficult

 

hope that helps

 

john

[john pike]

A warning issued today by the Ministry of the Russian Federal for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters (EMERCOM) has advised the World Organization of Volcano Observatories (WOVO) that a "Red Alert" status level for the Borah Peak Mountain in Idaho (North America/United States) may be warranted in the coming weeks due to increased volcanic-seismic activity detected by both ground and satellite observations. This is the second such warning issued by EMERCOM this year and follows their 24 January prediction that an earthquake and ensuing tsunami are expected to strike off the southwestern coast of Sakhalin Island, to the north of the epicenter of the 2 August 2007 6.2 magnitude earthquake in the town of Nevelsk that had, likewise, been successfully predicted by Russian scientists. Important to note about EMERCOM predictions is that unlike their Western counterparts, Russian scientists suggest four new techniques for long-range prediction of earthquakes and volcanic eruptions, which are universal and can be applied to all of the regions of the earth. This type of forecasting has no psychic aspects to it at all, and is called "phase trajectory technique." It concerns a simultaneous analysis of periodic and quasi-periodic space rhythms, which involve many factors that have a great effect on these terrible formations, including but not limited to lunar tides and solar cycles. The "Red Alert" status for Borah Peak Mountain (the largest in Idaho), this report states, means that an eruption is forecast to be imminent with significant emission of ash into the atmosphere likely.

First arousing EMERCOM concerns about Borah Peak Mountain, this report continues, was the 4.8 magnitude earthquake which struck the Yellowstone Caldera (Supervolcano) on 30 March that was the largest trembler to hit this region in nearly 30 years and was preceded by a series of small earthquakes in central Idaho and accompanied by a near simultaneous 3.1 magnitude earthquake occurring near Borah Peak Mountain on the same date. Prompting the EMERCOM warning about Borah Peak Mountain to WOVO, this report says, was yesterdays (12 April) 4.9 magnitude earthquake in central Idaho near the city of Challis, which on 28 October 1983 suffered a 6.9 magnitude earthquake which killed two children. Critical to note about Borah Peak Mountain and central Idaho, this report says, is that it is a part of what is called the Internmountain Seismic Belt (ISB) [photo map 1st right] which extends from Southern California and connects many of the Western United States regions, most particularly the Yellowstone Caldera, and is overdue for a catastrophic volcanic eruption event. As to how seismically violent this region is, EMERCOM in their report further notes, the 1983 Borah Peak Mountain earthquake ranks as one of the most powerful earthquakes in the 20th century in the lower 48 US States and produced a 21 mile long scarp that was raised at points as much as 14 feet and is still visible today. Of greatest concern to EMERCOM scientists regarding Borah Peak Mountain volcanic activity, this report says, are the growing number of fracking operations currently being allowed in the ISB regions which are now at the very edge of the Yellowstone Caldera, including its two most seismically active States, Nevada and Idaho. Most perplexing, this report says, are that these fracking operations in the ISB volcanic zone are being allowed to continue by the Obama regime in spite of their own experts findings and recommendations, especially from this past weeks report from their Midwestern region which, in part, states: "Ohio geologists have found a probable connection between fracking and a sudden burst of mild earthquakes last month in a region that had never experienced a temblor until recently, according to a state report. The quake report, which coincided with the state's announcement of some of the nation's strictest limits on fracking near faults, marked the strongest link to date between nerve-rattling shakes and hydraulic fracturing - the process of firing water, sand and chemicals deep into the earth to eject oil and natural gas out of ancient rock. Last month, Ohio indefinitely shut down Hilcorp Energy's fracking operation near the Pennsylvania border after five earthquakes, including one magnitude-3 temblor that awoke many Ohioans from their sleep." As to the space rhythms, lunar tides and solar cycle analysis prompting this "Red Alert" volcanic warning for Borah Peak Mountain, this EMERCOM report concludes, they are partly based upon the coming Blood Moon Tetrad Cycle due to begin this week on 15 April and conclude on 28 September 2015.
 

Related sites:

• http://en.ria.ru/russia/20140124/186884391/Russia-Predicts-Far-East-Tsunami-in-2014.html
• http://www.eutimes.net/2014/04/volcanic-red-alert-issued-for-idaho-by-emercom-scientists/

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=UGE-20140416-43394-USA

 

 

also this which is related

 

Hundreds of low-level and medium-sized earthquakes have struck central Idaho since last month, puzzling geologists who wonder whether the ruptures portend a much larger temblor to come or are merely the rumblings of a seismic fault previously thought to be dormant. The recent earthquake swarm, beginning on March 24 and climaxed by a 4.9 magnitude tremor on Saturday, has produced no reports of injuries or severe damage but has rattled nerves in a region where Idaho's most powerful known quake, measured at 6.9, killed two children in 1983. Saturday's earthquake was the strongest recorded in the state since 2005 and was followed on Monday by a magnitude 4.4 event that struck 10 miles north of the small ranching community of Challis, Idaho, according to the U.S. Geological Survey. The Challis tremor knocked pictures and animal mounts from walls, rattled dishes off tables and was felt by residents in neighboring Montana more than 100 miles from the quake's epicenter, officials said. The latest seismic surge, including 100 small to moderate quakes on Monday alone, has galvanized government scientists, who planned to install special seismometers in the area as early as Tuesday to more closely track the activity.

The likelihood of a severe earthquake coming on the heels of the recent swarm is low, but much is perplexing about the series of tremors, said Bill Phillips, a geologist with the Idaho Geological Survey at the University of Idaho. Such earthquake swarms typically are associated with the movement of molten rock below ground, which geologists credited for the recent quake cluster at Yellowstone National Park, or they are linked to an active fault, he said on Tuesday. "What has many of us scratching our heads is the present-day swarm doesn't appear to be on the big, active fault in the area that ruptured in 1983 and caused the largest earthquake in Idaho," Phillips said. He was referring to the magnitude 6.9 temblor that struck Mount Borah, Idaho's tallest peak, killing two children in Challis and damaging hundreds of homes and businesses. Idaho sits at the center of a seismic belt in the intermountain West that runs from northwestern Montana to southern Nevada and contains thousands of faults in the Earth's crust, said Michael Stickney, director of earthquake studies at the Montana Bureau of Mines and Geology. Carl Alexander, disaster coordinator in Challis, said schools have stepped up earthquake drills, and he has requested that emergency responders in Idaho and Utah be available if disaster strikes. Alexander is advising local residents to keep bottled water and canned goods on hand just in case "a big shaker" should strike.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=EQ-20140416-43393-USA

[john pike]

------------------------------------------------------------------------------------------------------

 

philippines

 

Alert level 1 has been raised over Taal and Mayon Volcanoes after volcanic earthquakes have been recorded Wednesday morning. Alert Level 1 also remains over Mayon Volcano as one volcanic earthquake was recorded Wednesday. NDRRMC said that the public should not enter the six-kilometer radius PDZ as rockfalls, landslides, ash puffs, and steam-driven or phreatic eruptions from the summit may occur.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20140416-43388-PHL

 

 

 

 

Alert level 1 has been raised over Taal and Mayon Volcanoes after volcanic earthquakes have been recorded Wednesday morning. According to the National Disaster Risk Reduction and Management Council’s (NDRRMC) “Update on Alert Status and Activity of Taal and Mayon Volcanoes†dated April 16, hazardous eruption is not imminent but the public is strictly off-limits in the main crater of Taal as sudden steam explosions may occur and high concentrations of toxic gases may accumulate. It also reported that the northern portion of Taal’s main crater rim, which is in Daang Kastila Trail’s vicinity, may also be hazardous as steam emission suddenly increases. The entire Volcano Island, NDRRMC said, is a permanent danger zone (PDZ).

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VA-20140416-43387-PHL

[jonboy]

Hi John

 

That Russian alert looks interesting. If its proves correct it will be a feather in their cap and perhaps will lead to better predictions

[john pike]

hi jon

 

will be fascinating to see if they are right

 

poses a few questions whether fracking is a good idea though

 

 

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Volcanic activity worldwide 17 Apr 2014: Shiveluch, Dukono, Tungurahua, Ubinas

Thursday Apr 17, 2014 17:18 PM |

Eruption from Shiveluch volcano this morning (KVERT webcam)

Shiveluch (Kamchatka): The volcano continues to slowly extrude viscous lava at its dome. An ash plume was produced this morning that rose to 13,000 ft (4.2 km) altitude and drifted SE. Most likely, it had been caused by a small to moderately large collapse on the eastern flank:

 

Dukono (Halmahera): Several ash plumes were observed during the past days, suggesting that explosive activity (probably strombolian-type) at the remote volcano remains elevated.

Tungurahua (Ecuador): Since the major explosion on 14 April, activity at the volcano has been characterized by several smaller and moderate explosions and near-constant steam and ash emissions that mainly drifted west and SW.
On 15 April, an eruption column rose about 5 km above the crater and drifted westward, causing ash fall in the towns of Mocha and Tisaleo.
IGPEN's monitoring data suggest that a new magma batch is currently rising from deeper sources into the volcanic edifice and will likely produce more volcanic activity in the coming days: Seismic data show the persistent presence of numerous long-period earthquakes typical of fluid movements. Deformation data indicate continuing inflation on the flanks of the volcano. SO2 plux has been measured to over 1500 tons per day.

Ubinas (Peru): Near-constant small to moderate explosions and ash emissions continue. Occasionally, incandescent fragments are ejected outside the crater.
INGEMMET volcanologists climbed the volcano on 15 April and observed that the recent explosive activity had destroyed the small lava dome in its summit crater (it had been observed during previous field surveys on 1 and 19 March). At its place, a deep pit crater could be seen:

 

http:////d321955.r.worldssl.net/forum//public/style_emoticons/default/wacko.png

[john pike]

Volcanic activity worldwide 21 Apr 2014: Fuego, Merapi, Dukono

http://www.volcanodiscovery.com/volcano-activity/news/44163/Volcanic-activity-worldwide-21-Apr-2014-Fuego-Merapi-Dukono.html

[john pike]

Volcanic activity worldwide 25 Apr 2014: Reventador, Tungurahua

http://www.volcanodiscovery.com/volcano-activity/news/44220/Volcanic-activity-worldwide-25-Apr-2014-Reventador-Tungurahua.html

[john pike]

NMI Alert Archive Search
NMI/USGS Volcanic Activity Notice

Volcano: Ahyi (VNUM #284141)

Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: UNASSIGNED

Current Aviation Color Code: YELLOW
Previous Aviation Color Code: UNASSIGNED

Issued: Friday, April 25, 2014, 9:24 PM PDT (20140426/0424Z)
Source: U.S. Geological Survey
Notice Number: 2014/N1
Location: N 20 deg 25 min E 145 deg 1 min
Elevation: -449 ft (-137 m)
Area: Mariana Islands

Volcanic Activity Summary: Starting at 06:35 24 April ChST (20:35 23 April UTC), seismic stations on Pagan, Sarigan, Anatahan and Saipan began recording signals believed to be from an undersea volcanic source. Hydroacoustic sensors on Wake Island suggest that the source of this seismic activity is at or near Ahyi seamount. We cannot locate precisely the source of the activity and it is possible that the vent is one of the other volcanic seamounts in the area.

Seismic activity is ongoing at this time. Satellite images show nothing out of the ordinary and we have received no reports of activity at the ocean's surface.

Recent Observations:
[Volcanic cloud height] Unknown
[Other volcanic cloud information] Unknown

Remarks: Ahyi seamount is a large conical submarine volcano that rises to within 137 m of the sea surface about 18 km SE of the island of Farallon de Pajaros (Uracas) in the northern Marianas. Water discoloration has been observed over the submarine volcano, and in 1979 the crew of a fishing boat felt shocks over the summit area followed by upwelling of sulfur-bearing water. On April 24-25, 2001 an explosive submarine eruption was detected seismically from a seismic station on Rangiroa Atoll, Tuamotu Archipelago. The event was well constrained (+/- 15 km) at a location near the southern base of Ahyi; the summit of the seamount lies within the location uncertainty.

 

http://volcanoes.usgs.gov/activity/status.php

Edited April 27, 2014 by john pike

[john pike]

Batu Tara volcano news:

latest (2014) | Apr-Dec 2013 | Jan-Mar 2013 | archive

Monday, Apr 28, 2014

Batu Tara volcano (Flores Sea, Indonesia): surge in activity

Satellite image from 26 April showing the plume from Batu Tara (MODIS / NASA, annotated by Culture Volcan)

The volcano seems to have entered a stronger phase of eruptions during the past days. A series of ash plumes from explosions were detected on satellite imagery since 26 April. The estimated altitude of the ash plumes is 8-10,000 ft (2.4-3 km) (VAAC Darwin).

 

http://www.volcanodiscovery.com/batu-tara/news.html

 

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Volcanoes Today, 28 Apr 2014: Ahyi, Fuego, Reventador, Tungurahua, Sinabung

Monday Apr 28, 2014 16:00 PM |

MODIS hot spots at Sinabung (MODVOLC, Univ. Hawaii)

Eruption from Fuego this morning

Current seismic signal at Reventador (CONE station, IGPEN)

Sinabung (Sumatra, Indonesia): The volcano continues to slowly aliment the large viscous lava lobe on the SE flank. Its growth is mainly manifested by numerous small to medium-sized rockfalls from its flanks and front, but also occasional pyroclastic flows that have reappeared since mid April.
These new(, but much smaller than those earlier this year) pyroclastic flows have been triggered by comparably larger collapses that originated from the upper part of the lobe.
The reason for the new pyroclastic flows might be that most arriving new lava, rather than contributing to the growth of the lobe as a whole, which is now a large and stiff mass difficult to move, now accumulates near the vent and starts to form a new lobe on top or at the side of the existing one. As the slope in the upper areas is steeper, it is easier for new lava masses to collapse into more energetic avalanches, i.e. pyroclastic flows.

Ahyi (United States, Mariana Islands): USGS raised the alert level for the submarine volcano due to abnormal seismicity detected in the area by hydroacoustic devices and land-based network devices on neighboring islands. However, the latter are relatively distant, such as Pagan located 270 km south. The source of the unusual signals that appreaed on 24 April can only be located approximately, and could originate from other seamounts near Ahyi volcano.
For the time being, no other indications of possible volcanic submarine activity have been detected.

Fuego (Guatemala): Activity has remained at normal, but relatively high levels, characterized by intermittent small to moderately strong strombolian explosions at intervals ranging from 10 minutes to more than 1 hour. The strongest explosions eject abundant glowing material to 150 m above the crater and ash plumes up to near 1 km, and are usually accompanied by shock waves felt in several km radius.

Reventador (Ecuador): The volcano's activity remains moderate to high, with continuing sporadic explosions. Cloud cover has prevented direct observations most of the time.

Tungurahua (Ecuador): Activity of the volcano remains comparably low, with only few and weak emissions of low energy. A number of lahars, caused by heavy rains remobilizing loose deposits, occurred in the riverbeds of Ingapirca, La Rea, Achupashal and others streams on the S and SW sides.

 

Edited April 28, 2014 by john pike

[john pike]

KÄ«lauea volcano eruption update

 

Week of April 28th, 2014

Update Mon 28 Apr 22:30

Kilauea continues to erupt in two locations, at the summit within Halemaumau crater and along the East Rift Zone at Pu'u 'O'o. Over the past week the lava lake at the summit has risen and fallen several times and is currently stabilized at 34m (112ft). Volcanic gases levels at the summit continue to be elevated.

Along the East Rift Zone, we have seen some new activity within Pu'u 'O'o cinder cone - The lava flow that began late on April 22 on the floor of Pu'u 'O'o crater slowly continued to drain. The flow on the upper north flank continued to be active as well as to the southeast of the cone suggesting another overflow of lava from the crater floor in that direction.

 

 

http://www.volcanodiscovery.com/hawaii/kilauea/current-activity.html

[john pike]

Slamet volcano (West Java, Indonesia): strombolian eruptions intensify

Tuesday Apr 29, 2014 18:20 PM | BY: T

Strombolian eruptions continue from the active vent in the summit caldera of the volcano and seem to have intensified recently. According to a local newspaper article, 52 explosions were observed during midnight until this morning, which ejected lava bombs to heights of 500-700 meters. Incandescent material is visible like fireworks from observation points at the feet of the volcano.
A particularly strong explosion this morning threw lava bombs to 1500 m distance during a stronger explosion this morning.
According to Surono, head of the National Geological Survey, the activity at Slamet has been increasing recently, but remains confined within a 2 km radius around the crater. The alert status of the volcano has not been changed for now, and remains only (!) at "waspada" ("alert", or 2 on a scale of 1-4).

 

 

Slamet volcano

stratovolcano 3428 m (11,247 ft)
Central Java, Indonesia, -7.24°S / 109.22°E
Current status: erupting (4 out of 5)
Slamet webcams / live data

 

Slamet volcano, a majestic stratovolcano in Central Java, is Java's second highest and one of its most active volcanoes. It contains a wide summit area with 4 craters. Its most recent eruption began in April 2009.

Background:

Slamet has a cluster of about three dozen cinder cones on its lower SE-NE flanks and a single cinder cone on the western flank. The volcano is composed of two overlapping edifices, an older basaltic-andesite to andesitic volcano on the west and a younger basaltic to basaltic-andesite one on the east. Gunung Malang II cinder cone on the upper eastern flank on the younger edifice fed a lava flow that extends 6 km to the east. Four craters occur at the summit of Gunung Slamet, with activity migrating to the SW over time.
Historical eruptions, recorded since the 18th century, have originated from a 150-m-deep, 450-m-wide, steep-walled crater at the western part of the summit and have consisted of explosive eruptions generally lasting a few days to a few weeks.
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Source: GVP

 

http://www.volcanodiscovery.com/slamet.html

Edited April 29, 2014 by john pike