General Volcanic Activity Thread!

[john pike]

http://volcanoes.usgs.gov/nmi/activity/index.php

 

NORTHERN MARIANA ISLANDS INFORMATION STATEMENT

Wednesday, April 30, 2014 5:36 AM PDT (Wednesday, April 30, 2014 12:36 UTC)

[john pike]

Volcanic activity worldwide 30 Apr 2014: Fuego, Merapi, Ambrym, Dukono, Slamet

Wednesday Apr 30, 2014 17:29 PM |

Volcanoes in the South Sea - volcano expedition to Vanuatu

Strong strombolian eruption at Fuego this morning

Slamet (Central Java): Following the increase in explosions, VSI raised the alert status of the volcano from Waspada to Siaga ("watch"), i.e. 3 on a scale of 1-4. Slamet is now along with Sinabung, Karangetang and Lokon-Empung the 4th Indonesian volcano on high alert.##########

Merapi (Central Java, Indonesia): VSI raised the alert level of the volcano from "normal" to "waspada" (2 out of 4). This decision was triggered by numerous signs that the volcano is in unstable phase that might or might not build up to an eruption: an increase in volcano-tectonic earthquakes, observed rock avalanches and gas emissions were detected over the past weeks.
People are currently advised not to climb the volcano.

Dukono (Halmahera): The currently intense phase of activity continues. More ash plumes, typically estimated at 8,000 ft (2.4 km) altitude and drifting up to 100 km SE were detected by VAAC Darwin.


Fuego (Guatemala): Strombolian activity remains at similar, relatively intense levels. Incandescent material is thrown to up to 200 m above the crater and ash plumes reach 800 m in height. The following video shows the activity as time-lapse during the past 12 hours:

 

 

 

Edited April 30, 2014 by john pike

[john pike]

CASCADES VOLCANO OBSERVATORY INFORMATION STATEMENT Wednesday, April 30, 2014 9:05 AM PDT (Wednesday, April 30, 2014 16:05 UTC)

MOUNT ST. HELENS VOLCANO (VNUM #321050)

46°12' N 122°10'48" W, Summit Elevation 8363 ft (2549 m)

Current Volcano Alert Level: NORMAL

Current Aviation Color Code: GREEN

Posted via the USGS Volcano Notification Service (VNS) http://volcanoes.usgs.gov/vns/

Analysis of current behavior at Mount St. Helens indicates that the volcano remains active and is showing signs of long-term uplift and earthquake activity, but there are no signs of impending eruption. Since the end of the 2004-2008 dome-building eruption at Mount St. Helens, scientists at the USGS Cascades Volcano Observatory (CVO) and the Pacific Northwest Seismic Network (PNSN) have been monitoring subtle inflation of the ground surface and minor earthquake activity reminiscent of that seen in the years following the 1980-1986 eruptions. Careful analysis of these two lines of evidence now gives us confidence to say that the magma reservoir beneath Mount St. Helens has been slowly re-pressurizing since 2008. It is likely that re-pressurization is caused by arrival of a small amount of additional magma 4-8 km (2.5-5 miles) beneath the surface. This is to be expected while Mount St. Helens is in an active period, as it has been since 1980, and it does not indicate that the volcano is likely to erupt anytime soon. Re-pressurization of a volcano�s magma reservoir is commonly observed at other volcanoes that have erupted recently, and it can continue for many years without an eruption.

USGS and PNSN are continuing to monitor ground deformation and seismicity at Mount St. Helens. In an effort to learn more about activity beneath the volcano, they will conduct two additional types of measurements this summer. Surveys will measure the types and amounts of volcanic gases being released, and the strength of the gravity field at the volcano. Both types of measurements are sensitive to changes in the amount or depth of subsurface magma. The information collected at Mount St. Helens continues to help scientists interpret behaviors at other volcanoes and to improve eruption forecasting capabilities. Additional research results will be posted in USGS Updates, Information Statements, and on the USGS-CVO website.

 

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

[john pike]

Volcanic activity worldwide 1 May 2014: Soputan, Bagana, Suwanose-jima, Popocatépetl, Shiveluch, Du...

Thursday May 01, 2014 09:11 AM |

Steaming and ash emission from Shiveluch this morning (KVERT webcam)

Glow from Suwanosejima volcano at night (JMA)

Seismic crisis at Soputan volcano on the seismograph of SOP station yesterday (VSI)

Small explosion from Popocatépetl yesterday

Ash emission from Ubinas last evening

Shiveluch (Kamchatka): Activity is currently relatively low, but the volcano continues to extrude viscous lava into the dome. Occasional small avalanches, explosions and strong steaming accompany this activity.

 

Chirpoi (Kurile Islands, Russia): SVERT reported that satellite images over Snow, a volcano of Chirpoi, detected a thermal anomaly on 21 and 27 April. Cloud cover obscured views on the other days during 22-28 April. The Aviation Color Code remained at Yellow.

(Smithsonian / USGS Weekly Volcanic Activity Report 23-29 April 2014)

Chirinkotan (Northern Kuriles): SVERT reported that satellite images of Chirinkotan showed gas-and-steam emissions on 25 and 27 April. Cloud cover obscured views during 21-28 April. The Aviation Color Code remained at Yellow.

(Smithsonian / USGS Weekly Volcanic Activity Report 23-29 April 2014)

Suwanose-jima (Ryukyu Islands): After some weeks of no or less visible activity, the volcano has again become more active and bright glow is visible above the crater at night, suggesting the near-continuous small strombolian-type explosions or perhaps even the presence of a small lava lake.

A larger explosion on 29 April produced an ash plume that rose to an altitude of 1.2 km (4,000 ft) a.s.l. and drifted E.

Bagana (Bougainville Island, Papua New Guinea): An explosion occurred this morning. A volcanic ash plume rose to 7,000 ft (2.1 km) altitude and drifted 40 km to the SSE (VAAC Darwin).

Soputan (North Sulawesi, Indonesia): As the 5th volcano in Indonesia currently on orange alert, the alert level of Soputan was raised to "siaga" (or 3 on a scale of 1-4) by VSI this morning. The decision came as a result of a marked increase in seismic activity over the past day.

Seismic activity started to be elevated early this year. The volcano is one of Indonesia's most frequently active and typically erupts every few years, often with only short periods of precursory seismic activity. The last eruption occurred in 2012, and the current crisis could very well lead to a new eruption in the near future.

At the moment, an exclusion zone of 6.5 km radius is in place around the volcano.

Dukono (Halmahera): Activity remains elevated. Strombolian to vulcanian-type explosions produce ash plumes, typically reaching about 8,000 ft (2.4 km) altitude that are spotted every day on satellite imagery.

Shishaldin (United States, Aleutian Islands): AVO reported that although cloud cover occasionally prevented web-cam and satellite observations of Shishaldin's summit area during 23-29 April, periods of elevated surface temperatures and minor steaming were observed. No significant changes were detected in seismic data. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

(VOLCANO: Smithsonian / USGS Weekly Volcanic Activity Report 23-29 April 2014)

Popocatépetl (Central Mexico): No significant changes in activity have occurred. CENAPRED reported 73 low-intensity exhalations during 29-30 April, some of which produced small puffs of ash. Glow at the crater remains visible at night.

A small volcanotectonic earthquake of magnitude 2.4 occurred on 29 April at 13:44 local time.

Ubinas (Peru): Ash emissions and occasional small explosions continue at reduced intensity

[john pike]

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE Thursday, May 1, 2014 6:55 AM HST (Thursday, May 1, 2014 16:55 UTC)

This report on the status of Kilauea volcanic activity, in addition to maps, photos, and Webcam images (available at http://hvo.wr.usgs.gov/activity/kilaueastatus.php), was prepared by the USGS Hawaiian Volcano Observatory (HVO). All times are Hawai`i Standard Time.

KILAUEA VOLCANO (VNUM #332010)
19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary: The eruption continued at the summit and within the east rift zone with activity in and near Pu`u `O`o crater. The summit tiltmeter network recorded a weak DI deflationary tilt event and the level of the circulating summit lava lake fluctuated. At the middle east rift zone, two lava flows have been active on the Pu`u `O`o crater floor, going beyond the crater rim to the north and southeast; the Kahauale`a 2 lava flow most likely continued to be active near its front but our ability to monitor it is temporarily limited. Gas emissions remained elevated.

Recent Observations at Kilauea summit: The summit tiltmeters recorded a weak DI deflationary tilt event starting yesterday morning and the lava-lake level dropped slightly, but then rose early this morning to an estimated 31-32 m (102-105 ft) below the floor of Halema`uma`u crater. Gas emissions continued to be elevated: during the week ending on 04/29/14, the summit SO2 emission rate varied between 3,600 and 7,400 tonnes/day (see caveat below); the ambient SO2 concentrations near the vent vary greatly, are persistently great than 10 ppm, and frequently exceed 50 ppm (upper limit of detector). The gas plume typically included a small amount of ash-sized tephra (mostly fresh spatter bits and Pele's hair from the circulating lava lake); the heaviest pieces are deposited onto nearby surfaces while the finer bits can be carried several kilometers before dropping out of the plume.

Seismic tremor levels were variable with a few dropouts yesterday and elevated tremor levels this morning. Twenty-five earthquakes were strong enough to be located beneath Kilauea Volcano in the past 24 hours: 12 on south flank faults, 8 beneath the summit caldera, 1 within the middle east rift zone (south of Pu`u `O`o, and 4 within the upper east rift zone. GPS receivers spanning the summit caldera recorded movements mimicking the recent tilt changes and +1.5 cm of extension since mid-April; the long-term, cross-caldera measurements indicate continued extension at a rate averaging 10 cm/yr (4 in/yr) since March, 2010.

 

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

 

more in link above

Edited May 1, 2014 by john pike

[john pike]

Cerro Negro de Mayasquer volcano (Colombia): seismic crisis, alert level raised

Friday May 02, 2014 10:38 AM | BY: T

The alert level of the twin-volcanoes Cerro Negro and Chiles has been raised to yellow in response to an ongoing seismic crisis and deformation that has been detected since November 2013, when a new monitoring network had been installed.

INGEOMINAS reported that seismic activity has remained elevated and that so far, more than 60,000 small earthquakes at shallow depths (1-6 km) have been recorded since November 2013. The epicenters were between 3-5 km SW of the Chiles volcano, while deformation affects neighboring Cerro Negro volcano to the west. Several of them were felt by people living close by. The largest quake so far was a magnitude 4.5 event that was felt widely.

Colombian volcanologists mapped the risk zones for each of the two volcanoes. Neither of them has recorded historical eruptions and little is known about their activity. Whether or not the current unrest leads to an eruption in a near or medium-term future (months, years), and if so, which of the two volcanoes would be involved is unknown.

Since the location of the volcanoes is at the Ecuadorian border, the Ecuadorian civil defense SNGR (Secretaría National Management Riesgos) also raised an yellow alert for the potentially affected area in Ecuador.

http://www.volcanodiscovery.com/cerro-negro-de-mayasquer/news/44470/Cerro-Negro-de-Mayasquer-volcano-Colombia-seismic-crisis-alert-level-raised.html

[karyo]

Cerro Negro de Mayasquer volcano (Colombia): seismic crisis, alert level raisedFriday May 02, 2014 10:38 AM | BY: TThe alert level of the twin-volcanoes Cerro Negro and Chiles has been raised to yellow in response to an ongoing seismic crisis and deformation that has been detected since November 2013, when a new monitoring network had been installed.INGEOMINAS reported that seismic activity has remained elevated and that so far, more than 60,000 small earthquakes at shallow depths (1-6 km) have been recorded since November 2013. The epicenters were between 3-5 km SW of the Chiles volcano, while deformation affects neighboring Cerro Negro volcano to the west. Several of them were felt by people living close by. The largest quake so far was a magnitude 4.5 event that was felt widely.Colombian volcanologists mapped the risk zones for each of the two volcanoes. Neither of them has recorded historical eruptions and little is known about their activity. Whether or not the current unrest leads to an eruption in a near or medium-term future (months, years), and if so, which of the two volcanoes would be involved is unknown.Since the location of the volcanoes is at the Ecuadorian border, the Ecuadorian civil defense SNGR (Secretaría National Management Riesgos) also raised an yellow alert for the potentially affected area in Ecuador.http://www.volcanodiscovery.com/cerro-negro-de-mayasquer/news/44470/Cerro-Negro-de-Mayasquer-volcano-Colombia-seismic-crisis-alert-level-raised.html

I find it fascinating when little is known about a volcano's activity! Let's see what we'll get.

 

Karyo

[john pike]

hi karyo

 

i agree its all fascinating .

 

so is this

 

 

During the past week, we have been keeping a close watch on the Northern Mariana Islands, as seismometers on the islands record high levels of seismicity from an undersea volcano near the island of Farallon de Pajaros. The seismic signals almost certainly herald an eruption. In fact, submarine explosions were heard by scuba divers who are conducting coral reef research in the area. The divers even felt the shock waves from the explosions, and one of the most powerful ones reverberated through the hull of the NOAA base ship, Hi'ialakai, leading the crew to think something had happened to the ship. Shipboard personnel also reported a large sulfur slick on the southeast coastline of Farallon de Pajaros.Unfortunately, the ship had to leave the area under threat of an advancing typhoon. If they can get back to the vicinity soon, they may be able to investigate the source of the explosions with great caution, keeping in close contact with U.S. Geological Survey (USGS) and Commonwealth of the Northern Mariana Islands emergency management personnel, who are monitoring the seismicity. The CNMI emergency management office and the volcano observatories of the USGS have been working together for over 30 years to establish volcano monitoring networks and assess volcanic hazards in the Mariana Islands. The most likely source of the current activity is Ahyi seamount, about 20 km (12.4 miles) southeast of Farallon de Pajaros. Ahyi rises to within 64 m (210 ft) of the ocean surface and is associated with several reports of possible eruptions in historical times, the most recent in 2001.Interspersed among the volcanoes that rise above sea level to form the NMI are many submarine volcanoes. Together, the islands and submarine volcanoes form the Mariana arc, a classic example of an island arc. These arcs, such as the Aleutians and the Japanese archipelago, are formed at subduction zones-boundaries where one tectonic plate plunges beneath another. Reports of discolored water throughout the Mariana arc are common, indicating that the NMI may experience frequent submarine eruptions. A dramatic, recent example is the 2010 eruption of South Sarigan seamount, which sent an eruption plume up to 12 km (40,000 ft) above sea level. The plume intersected many commercial air traffic routes, raising concern that the abrasive ash fragments could damage aircraft or even stall their engines. In addition, the eruption posed a potential hazard to ocean-going vessels, as it produced a large area of discolored water, possibly including a raft of pumice-a type of rock that can be produced in explosive volcanic eruptions.A recent submarine eruption of Havre seamount north of New Zealand in 2012 created a 20,000 square-kilometer (7,700 sq-mi) raft of pumice-about twice the area of the island of Hawai'i!-that eventually spread to about 4 million square-kilometers (1.5 million sq-mi) as it broke up. Pumice can float because it’s basically a type of foam-filled with gas bubbles encased in quickly cooled lava-which makes it less dense than the ocean water. It’s possible, but not certain, that the current unrest near Ahyi seamount will escalate into a vigorous eruption, with the creation of pumice rafts, and even an explosive eruption column rising above sea level. If this happens, there are further possible threats of local disturbances of the water column that could result in local tsunami and ash fallout from the eruption plume. Long-time readers of this column may be wondering about the possible outcomes of the seismic unrest that we sometimes report on from our own submarine volcano, Lo'ihi, off the south coast of Hawai'i Island. The most recent confirmed eruption there, in 1996, created a large collapse pit at the summit. Deposits formed during that eruption and numerous previous eruptions, sampled by submersible vehicles, attest to frequent episodes of explosive volcanism at Lo'ihi.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20140502-43594-OTH

[john pike]

an interesting read

 

The coldest place on Earth is also one of the rare spots where a roiling lava lake offers a window into the heart of a volcano.

At Erebus volcano in Antarctica, a long-lived lava lake puffs steam and launches lava bombs at scientists who scale its slopes, hoping to unravel the mysteries of how volcanoes work. (Lava bombs are flying blobs of molten rock.)

 

http://www.livescience.com/45038-erebus-lava-lake-cycles-revealed.html

 

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Etna volcano update:

Friday May 02, 2014 23:17 PM | BY: EMANUELA

Current tremor signal (ECPNZ station, INGV Catania)

A seismo-volcanic event occurred this night at 23:00 (local time) most probably from the Bocca Nuova crater. It wasn't visible on webcams but only on the seismic tremor and infrasound signals.

• All news about: Etna volcano
• Information about: Etna volcano

Edited May 2, 2014 by john pike

[john pike]

Fuego and Santiaguito volcanoes (Guatemala): lahar warning due to heavy rainfall

Saturday May 03, 2014 14:17 PM | BY: T

With the arrival of the rain season, INSIVUMEH warns of mud flows that will likely occur during heavy rainfalls remobilizing loose deposits that have accumulated in the canyons draining from the volcano. Such lahars are potentially very destructive and can reach and flood low lying areas on the south coast.

The canyons that are most affected by lahars include the Santa Teresa, Taniluya, Ceniza, El Jute, Trinidad, and Las Lajas canyons, which are tributaries of the rivers Pantaleon, Achiguate, and Guacalate.

Similarly, at Santiaguito volcano, lahars could occur inside the river beds of Nima I, Nima II, San Isidro-Tambor, which drain into the Samala river. Potential damage could be afflicted to the bridge of Castillo Armas, and to the road turn at Niño.

All news about: Fuego volcano

http://www.volcanodiscovery.com/fuego/news/44487/Fuego-and-Santiaguito-volcanoes-Guatemala-lahar-warning-due-to-heavy-rainfall.html

Edited May 3, 2014 by john pike

[john pike]

Askja volcano news & activity updates: Herðubreið volcano (Iceland): earthquake swarm 12 km NE of Askja

Saturday May 03, 2014 17:08 PM | BY: T

Location of the recent earthquakes near Askja (Iceland)

A swarm of shallow earthquakes at 2-10 km depth has started under the Herðubreið volcano about 12 km NE of the Askja caldera. The largest earthquakes so far were 2 magnitude 3.2 and 3.0 events.
Whether the earthquakes are caused by intruding magma at shallow depth, and could be a potential precursor to a new eruption of the volcano, is at present unknown.

• All news about: Askja volcano
• Information about: Askja volcano

 

 

 

 

 

 

 

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/vatnajokull/#view=table

 

images thanks to iceland met office (link supplied)

 

swarms are common here but this is quite noticeable

 

a wait and see jobbie now

Edited May 3, 2014 by john pike

[john pike]

Dukono volcano (Halmahera, Indonesia) activity update

Saturday May 03, 2014 14:09 PM | BY: T

Explosive eruptions, strombolian to vulcanian type, continue at the volcano. Ash plumes at 8,000 ft (2.4 km) altitude were observed drifting up to 50 nautical miles to the east.

[*]All news about: Dukono volcano

[*]Information about: Dukono volcano

[john pike]

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_index&rid=404361

 

3.7 2km deep  iceland

 

http://en.vedur.is/earthquakes-and-volcanism/earthquakes/vatnajokull/#view=map

 

swarm still ongoing

[Buriedundersnow]

Askja is going to be interesting it wasn't the volcano in Iceland I was hoping would go next I was hoping for Hekla or Katla to go off and give us a chance of getting some ejecta into the stratosphere to get some cooling to help us with winters snow wise but no matter which volcano goes off next after what happened in 2010 with Eyjafjallajokull and the flight debacle we are sure to get some decent television coverage with what ever volcano goes off next.

 

also with the amount of unrest with quite a few of the bigger volcanoes in Iceland we may have the chance of seeing quite an active period in Icelands history which for all volcano enthusiasts would be something to see (not too good for those in Iceland though).

[john pike]

Volcanoes Today, 6 May 2014: Kilauea

Tuesday May 06, 2014 02:00 AM |

Kilauea (Hawai'i): Eruption activity remains high on Kilauea, both at the summit and east rift zone. The lava lake within Halemaumau crater at the summit of Kilauea has fluctuated around an estimated 35m (115ft) below the crater floor. The glow produced at night from this lava lake is as bright as ever!

At Pu'u 'O'o cinder cone on the east rift zone, we have seen several new flows including some spilling over to the south. These flows got so close to the webcams that the USGS had to move some of them (seen in this photo). Flows also continue north east of Pu'u 'O'o although they seem to be weakening.

Earthquake activity and gas emissions continue to be elevated at the summit, as well as along the east rift zones. These are very exciting times for Kilaueas current eruption - stay tuned for the latest conditions!

 

http://www.volcanodiscovery.com/volcanoes/today.html

[john pike]

Zavodovski island (South Sandwich islands): ongoing activity

Friday May 09, 2014 09:30 AM | BY: T

Steam / ash plume from Zavodovski island on 19 April 2014 (NASA)

A NASA satellite image from 19 April shows that some activity (strombolian explosions, small lava lake?) was present on the remote volcano in the South Sandwich islands.

On the picture, a thin plume of white rises from the volcano on Zavodovski island, the northernmost of the South Sandwich Islands and streams to the northeast.

Further south, a wider white plume can be seen blowing across the Atlantic Ocean. This plume rises from the Mount Michael volcano, which is a young and frequently active strato-volcano located on Saunders Island, near the center of the South Sandwich Island chain.

[*]All news about: Zavodovski volcano

[*]Information about: Zavodovski volcano

---

Links / Sources:

[*]NASA catches images of volcanic activity in South Sandwich Islands (MercoPress)

[john pike]

Volcanic eruption is underway in Guatemala's Santiaguito (Santa Maria) volcano. The volcanic ash rising 25,000 feets altitude, pyroclastic flows are observed. Other information isn't available yet.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20140509-43687-GTM

 

more info when in

[john pike]

Recent Kilauea Status Reports, Updates, and Information Releases HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE Saturday, May 10, 2014 7:54 AM HST (Saturday, May 10, 2014 17:54 UTC)

This report on the status of Kilauea volcanic activity, in addition to maps, photos, and Webcam images (available at http://hvo.wr.usgs.gov/activity/kilaueastatus.php), was prepared by the USGS Hawaiian Volcano Observatory (HVO). All times are Hawai`i Standard Time.

KILAUEA VOLCANO (VNUM #332010)

19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)

Current Volcano Alert Level: WATCH

Current Aviation Color Code: ORANGE

Activity Summary: The eruption continued at the summit and within the east rift zone. The summit tiltmeter network recorded minor fluctuations with deflationary tilt after midnight and the level of the circulating summit lava lake dropped slightly. Increased seismicity beneath the summit area reflect high magma pressures there. At the middle east rift zone, lava flows continued to be active on the northeast and south flanks of the Pu`u `O`o cone. The Kahauale`a 2 lava flow remained active near its slowly advancing front. Gas emissions remained elevated.

Recent Observations at Kilauea summit: The summit tiltmeters recorded minor fluctuations with about half-a-microradian deflationary tilt after midnight that may be the start of a DI event. The lava-lake level fluctuated and dropped slightly to and estimated 35-37 m (115-121 ft) below the floor of Halema`uma`u crater. Gas emissions continued to be elevated: during the week ending on 05/06/14, the summit SO2 emission rate varied between 3,000 and 5,000 tonnes/day (see caveat below) during times of moderate trade winds; the ambient SO2 concentrations near the vent vary greatly, are persistently great than 10 ppm, and frequently exceed 50 ppm (upper limit of detector). The gas plume typically included a small amount of ash-sized tephra (mostly fresh spatter bits and Pele's hair from the circulating lava lake); the heaviest pieces are deposited onto nearby surfaces while the finer bits can be carried several kilometers before dropping out of the plume.

Seismic tremor levels were variable with no dropouts since 10 am yesterday. Thirty-seven earthquakes were strong enough to be located beneath Kilauea Volcano in the past 24 hours: 9 scattered beneath the summit area and to the north and northeast, 6 extending south from Halema`uma`u Crater, 2 in the Ka`oiki Pali area, 12 within the upper east rift zone, and 8 on south flank faults. GPS receivers spanning the summit caldera recorded movements mimicking the recent tilt changes; the long-term, cross-caldera measurements indicate continued extension at a rate averaging 10 cm/yr (4 in/yr) since March, 2010.

Note: Recent seismicity in the caldera of Kilauea has been elevated over the last 48 hours with several Long Period (LP) and Very Long Period (VLP) Earthquakes. Locating earthquakes of this type are particularly difficult, and thus our earthquake maps show a spread in locations around the caldera that does not reflect the location of the actual sources. Based on detailed studies of this type of event, we expect that most of these earthquakes are associated with the shallow conduit under Halema`uma`u. The occurrence of earthquakes of this type and number are often associated with high lava-lake levels and likely reflect high pressures in the summit caldera.

 

http://hvo.wr.usgs.gov/activity/kilaueastatus.php

 

 

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_last&rid=405947

interesting run of quakes there today

[john pike]

[john pike]

Sakurajima volcano erupting in Japan

© Photo: "Vesti.Ru"

 

The Sakurajima volcano started erupting on the southern Japanese island of Kyushu today. Sakurajima is considered to be one of the most active volcanos in Japan. The national meteorological service of the country reports that the column of ash is rising to the height of over 4,5km.

According to Japanese meteorologists, this eruption has become the most powerful this year. The flow of lava and ash is moving in the direction of Ibusiki City but currently there is no information about any wreckage or casualties.

Sakurajima erupts up to several hundred times a year. Today's eruption is No.126. The volcanic activity usually harms the neighbouring Kagoshima Prefecture where the only Japanese space launch site Uchinoura is located.
Read more: http://voiceofrussia.com/news/2014_05_11/Sakurajima-volcano-erupting-in-Japan-8216/

 

 

[john pike]

Etna volcano updates and eruption news:

Etna volcano update:

Monday May 12, 2014 00:54 AM | BY: EMANUELA

Strombolian activity at Etna's NSEC this evening seen from Catania

Current tremor signal (ECPNZ station, INGV Catania)

Near-continuous weak strombolian activity is visible from the New SE crater. Tremor is currently low.

[*]All news about: Etna volcano

[*]Information about: Etna volcano

[john pike]

Shishaldin Volcano is rumbling to life in the Aleutian Islands. The Alaska Volcano Observatory detected long tremors and an increase in surface temperatures at Shishaldin earlier today. Those could be signs of an an eruption, says Robert McGimsey. He's a geologist at the AVO. "Typical eruptions of Shishaldin have involved what we call Strombolian eruptions, which are gas-charged emissions," McGimsey says. Shishaldin, which is located on Unimak Island, is unique among volcanoes in Alaska. It doesn't have a lava plug or a dome -- just a deep, open vent. McGimsey says that when Shishaldin erupts, "it's gas bubbles coming up through the throat or the vent of the volcano." "And when they pop, it just kind of throws magma up into the air," McGimsey says. "That's kind of what defines lava fountaining." That lava glides down the flanks of the volcano, leaving a smooth layer. That's why Shishaldin is the most symmetrical, conical volcano in the world. But for now, there's no lava coming out of Shishaldin. Satellite images show steam, and some light traces of ash. Still, this is the most active that the volcano has been since 2009. The AVO started logging small explosions and ash clouds at Shishaldin this winter. They elevated the volcano's official alert level in March.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=VE-20140514-43740-USA

[john pike]

Dukono volcano (Halmahera, Indonesia) activity update

Explosive activity continues at the volcano. An ash plume was last seen at 8,000 ft (2.4 km) altitude extending 80 km to the SW yesterday.

 

http://www.volcanodiscovery.com/dukono/news.html

 

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Sakurajima volcano (Japan) activity update: powerful explosions on 10 May

Ash plume from an explosion at Sakurajima early on 10 May

After a series of powerful explosions on 10 May, which produced ash plumes up to 18,000 ft (5.5 km) altitude, the volcano has been quieter again over the past days

 

 

 

 

 

 

 

 

 

http://www.volcanodiscovery.com/sakurajima/news.html

Edited May 14, 2014 by john pike

[john pike]

volcanoes Today, 15 May 2014: Santa María / Santiaguito, San Miguel, Shishaldin, Merapi, Dukono, Sinabung

Thursday May 15, 2014 11:00 AM |

Small pyroclastic flow at Sinabung on the morning of 13 May

Shishaldin volcano yesterday evening (AVO webcam)

Microseismic activity at Chaparrastique volcano (SNET)

Sinabung (Sumatra, Indonesia): Activity at the volcano remains weak. Slow lava extrusion continues along with occasional ash venting and small pyroclastic flows triggered by collapse of parts of the viscous lava lobe on the southern flank.

Merapi (Central Java, Indonesia): PVMBG reported that during 2-8 May white plumes rose as high as 650 m above Merapi. Thumping noises continued to be reported from multiple observation posts. Seismicity fluctuated but remained above background levels.

The Alert Level remained at 2 (on a scale of 1-4) on 29 April. (Smithsonian / USGS Weekly Volcanic Activity Report 7-13 May 2014)

Dukono (Halmahera): Activity at the volcano seems to be increasing - the sighting of ash plumes on satellite imagery has become a daily job of VAAC Darwin's watchful crew. This morning, a volcanic ash plume at estimated 10,000 ft (3 km) altitude extended 25 nautical miles from the volcano to the south.

Shishaldin (United States, Aleutian Islands): The Alaska Volcano Observatory believed that the activity at the volcano has a bit increased. Satellite data show persistent high temperatures in the summit crater which could be lava flows, or even a small lava lake, likely produced by episodes of lava fountains.

The heat signals detected went along with increasing volcanic tremor detected.

There is no visual confirmation of such activity so far; webcam images only show a weak degassing plume, but these images are too distant to allow detailed interpretations. The aviation alert level remained at Orange.

Santa María / Santiaguito (Guatemala): As expected, heavy rainfalls triggered a hot lahar (turbulent flow of mud, boulders and ash deposits mixed with water) that traveled down the Nima I river valley yesterday. The lahar carried lava blocks up to 2 m in diameter as well as many tree branches and trunks.

Abundant steam and sulfur gasses were released from the flowing masses. The lahar passed near the volcano observatory like a mix of "cement", where it let the ground vibrate, increased water content and speed as it reached the Samala river.

Similar rainfall could cause other lahars in the river San Isidro, the other important tributary of the Samala river. (INSIVUMEH)

San Miguel (El Salvador): During the past 2 days, seismic activity at the volcano has shown a sharp increase after it had been gradually decreasing since late February.

The latest bulletins published by SNET suggest that the most likely expected eruption would be strombolian-type with associated lava flows, probably on the north side of the volcano.

Even without an eruption, the volcano poses a serious risk of mud flows and landslides that could occur as a result of heavy rainfalls.

[john pike]

http://www.commuterexpress.com.ph/mayon-volcanic-activity-prompts-alert-1/