General Volcanic Activity Thread!

[john pike]

Sinabung volcano (Sumatra) - activity lower today, but evacuation efforts continue

Monday Sep 16, 2013 15:18 PM | BY: T

Degassing from Sinabung today

 

 

The volcano has been calm today and not produced new explosions except some weak ash venting this morning, and continues to show strong degassing. Evacuations of people living in close vicinity continue because the volcano could erupt more violently any time.

A 3 km exclusion zone around the volcano has been put in place. Local press reports suggest that about 6,000 people have been relocated to temporary shelters. Dust masks are being distributed to the population.

Degassing from Sinabung this evening:

[The PIT]

Mauna Loa twitching ???

 

http://www.wired.com/wiredscience/2013/09/eruption-update-for-september-17-2013-sinabung-mauna-loa-and-titan/#more-251991

[john pike]

hi pit

 

hopefully not with that one

 

Volcanoes Today, 17 Sep 2013: Etna, Sinabung

Tuesday Sep 17, 2013 17:03 PM |

Ash emission from New SE crater yesterday evening (LAVE webcam via etnawalk.it)

Eruption of Sinabung this morning (VSI webcam)

 

 

Sinabung (Sumatra, Indonesia): A powerful explosion occurred this morning. An ash plume rose to about 6 km height. The volcano continued with near-constant ash venting following the eruption.
The following video shows this morning's activity:

 

 

there are no reports of victims, but ash fall in the area is damaging crops, and prices for vegetables have jumped up.

 

 

Etna (Sicily, Italy): After a phase of complete quiet since 13 September, weak ash emissions occurred again at the New SE crater during the night 16-17 Sep, accompanied by a slight rise of tremor. This activity ceased again during the early hours of today.
Two of them are visible at the start and end of the following video from INGV's thermal webcam:

t

[john pike]

 

 

 

Mauna Loa twitching ???

 

http://www.wired.com/wiredscience/2013/09/eruption-update-for-september-17-2013-sinabung-mauna-loa-and-titan/#more-251991

Mauna Loa volcano (Hawai'i) - earthquake swarm as possible sign of gradual reawakening

Wednesday Sep 18, 2013 12:51 PM | BY: T

Recent earthquakes under Mauna Loa volcano

 

mmmmmmm

A small earthquake swarm occurred last week under the volcano. During 5-7 September, HVO detected about 350 small earthquakes up to magnitude 2.4 in a tightly clustered area at about 7 km depth west of the summit caldera. Only about 25 were strong enough to be located (map).

The swarm was in the same region where earthquakes began to occur a year or more before Mauna Loa's 1975 and 1984 eruptions. A likely interpretation is that the most recent swarm is a sign that some magma has intruded at the base of the volcano.

It is certainly no sign of an impending eruption in the very near future, but suggests that Mauna Loa, which still is the world's largest ACTIVE volcano, on the medium term, continues to prepare itself for its next eruption.

Edited September 18, 2013 by john pike

[john pike]

Volcanoes Today, 18 Sep 2013: Arenal, Mauna Loa, Dukono, Batu Tara

Wednesday Sep 18, 2013 14:03 PM |

 

 

 

Batu Tara (Sunda Islands, Indonesia): Explosions that produce ash plumes large enough to be spotted on satellite images occur almost daily now.

This could be merely an effect of better visibility due to currently better weather with less cloud cover, or indicate an increase of activity.

This morning, an ash plume was seen extending 25 nautical miles to the NE, at an estimated altitude of 7,000 ft (2.1 km).

Dukono (Halmahera): An explosion yesterday produced an ash plume rising to about 10,000 ft (3 km) altitude and drifting 25 nautical miles to the NE. (VAAC Darwin)

 

Arenal (Costa Rica): OVSICORI mentioned that rockfalls with rumbling noises have increased at the volcano over the past weeks. This could suggest that the volcano has started to wake up from its 3 years of slumber.

[john pike]

http://hisz.rsoe.hu/alertmap/site/index.php?pageid=seism_last&rid=353654

last 10 quakes near mauna loa

 

Wednesday September 18 2013, 16:41:20 UTC 48 minutes ago Island of Hawaii, Hawaii 2.4 8.9 USGS Feed Detail

 

 

http://quakes.globalincidentmap.com/#

[john pike]

Volcanoes Today, 19 Sep 2013: Reventador, Bagana, Klyuchevskoy, Kilauea

Thursday Sep 19, 2013 05:03 AM |

Klyuchevskoy volcano last evening with glow from the active lava flow

Bougainville Island (PNG) with Bagana volcano and a gas (with ash?) plume drifting SW (Terra / NASA satellite image 18 Sep)

Halema`uma`u glow at first sunset. (Photo: Erik Storm)

Small ash explosion from Reventador yesterday (IGPEN webcam)

 

 

Reventador (Ecuador): Activity remains at moderate to high levels. The volcano produces degassing, ash venting and relatively frequent small (strombolian-type) explosions that generate small ash plumes rising a few 100 m. Incandescence can be seen at night, IGPEN reported.

Video of yesterday's activity showing two small eruptions:

 

 

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

 

Klyuchevskoy (Kamchatka): Lava flows remain active on the SW upper flank and are often visible on the beautiful KVERT webcam.

KVERT had earlier this week stated that the lava flows may soon interact with glaciers, potentially producing tall ash plumes from phreatic explosions. The Aviation Color Code was raised to Orange. (Smithsonian/USGS Weekly Volcanic Activity Report)

Bagana (Bougainville Island, Papua New Guinea): It seems that the volcano has entered a more active phase, producing several explosions in the past days that sent ash plumes to altitudes of 8-9,000 ft (2.4-2.7 km) altitude.

A recent Terra satellite image shows a degassing plume drifting SW, another indication of the presence of fresh magma at the volcano.

Kilauea (Hawai'i): Aloha potential lava viewers, with an eruption & access update,

There are signs of life on the Peace Day lava tube downhill of Pu`u `O`o, with scouts reporting lava flows at the surface around the 1600 foot elevation within but near the top of the abandoned Royal Gardens subdivision. This flow appears to be moving downhill and access will get closer & easier with coming days, but reportedly is already on private land belonging to one of the Kalapana ohana.

... [show less]

There are certainly safety, logistic & legal issues to work out given the need for new hiking routes and different hazards presented by a different volcanic terrain, but in this particular case it's not unreasonable to be hopeful that there will be a legal but more difficult access to lava flows in a matter of days instead of weeks. Similar flows in the past have taken days to weeks to make it to the flats where there is easier access. At any point, there's never any guarantee of a viewing on any particular day as the volcano is subject to change with little notice, and we must really consider it a blessing that lava flows have been accessible safely and relatively easily, and most remarkably, continuously for the previous year and a half.

Meanwhile elsewhere on the volcano, glow from KÄ«lauea's summit is as bright as ever, visible on recent clear nights by many residents through the forest in nearby Volcano Village. The best viewing point remains the Jaggar Museum within the National Park, and lava lake levels in the Overlook Vent in Halema`uma`u crater remain near record highs for this phase of the eruption, surely a sign of things yet to come at the volcano's summit. The lava itself is not directly visible from the overlook, at least not yet at the time of this writing... but the orange glow in the evening, and especially at sunset and sunrise, just gets better and better.

[john pike]

Volcanic activity worldwide 20 Sep 2013: Pacaya, Popocatépetl, Ubinas, Sinabung, Shikotsu, Santa Ma...

Friday Sep 20, 2013 11:53 AM |

Earthquakes near Tarumai in 2013

Explosion from Popo early on 19 Sep

Santiaguito's Caliente lava dome yesterday morning

Seismic signal this morning at Pacaya (PCG station, INSIVUMEH)

Fuego yesterday morning (INSIVUMEH)

Seismic signal from Ubinas 18 Sep (UB2 station, IGP)

Shikotsu (Hokkaido): The latest report of the Japan Meteorological Agency indicates some unrest at the caldera. Seismic activity accompanied by inflation were recorded under the western flank of Tarumai stratovolcano (the most active vent of the system, located on the SW rim of the Shikotsu caldera) between late June and early July this year.

Following this period of deformation, deep seismicity under the western flank has increased above background since the beginning of July. There are no reports of unusual surface phenomena.

Sinabung (Sumatra, Indonesia): Since the eruptions on 15 and 17 September, the volcano has been calm, but VSI warns that new eruptions could follow.

Such new eruptions are likely to follow the style of the last explosion, a sudden vulcanian-type eruption: it was proobably caused by accumulating viscous magma trapped under a solid plug in the crater, which was eventually disintegrated during an explosion when pressure exceeded the strength of the plug.

According to volcanologist Hendrasto, head of PVMBG, there are 29 villages at risk within a zone of 6 km radius around the volcano.

Popocatépetl (Central Mexico): Activity has remained at generally low levels with no large fluctuations. During 18-19 Sep, the number of small to moderate emissions has risen to about 2 per hour. Some of these events produced ash plumes up to about 1 km height, but frequent cloud cover prevented observation most of the time.

The most significant were registered at 01:01 h, 05:53 h, 08:10 h and 10:16 h (19 Sep) local time (see webcam video below):

 

 

Santa María / Santiaguito (Guatemala): Activity has been week with no significant changes. No explosions were reported during 18-19 Sep, but moderate rock avalanches could be heard, indicating that (some of) the lava flows on the flanks of the Caliente dome remain weakly active.

Pacaya (Guatemala): An increase in seismic activity has occurred gradually over the past 24 hours. Individual explosion signals have merged into strong continuous tremor. This could indicate another paroxysm with continuous explosions / lava fountaining / lava flow emission in the progress, but CONRED / INSIVUMEH have not (yet) updated on this possible increase in activity.

During the past days, the volcano had been producing frequent strombolian eruptions with jets of incandescent lava reaching 50-100 m above the Mackenney crater.

Fuego (Guatemala): No significant change in activity occurred over the past days. Small to moderate explosions that often are accompanied by shock waves occur from time to time (several times per day). Ash plumes rose up to about 600 m during 18-19 September.

Ubinas (Peru): While the volcano has calmed down at the surface since the series of 9 phreatic explosions during 1-5 September, a pulse of volcanic tremor yesterday could indicate that the volcanic crisis is not over or even still at the beginning.

The Geophysical Institute of Peru recorded changes in seismicity with the appearance tremor starting 02:00 local time on 18 September.

Even though the strength of the tremor signal is still small, it suggests that a body of new magma has started to heat up the hydrothermal system or is moving into the volcanic edifice. This in turn increased the likelihood of new and possibly magmatic eruptions (i.e. if the magma reaches the surface).

[john pike]

Etna volcano current activity: ash emissions from New SE crater

 

Continuing ash emissions, slowly rising tremor

Update Sun 22 Sep 21:27

Sporadic small ash emissions have reappeared from the New SE crater during the past days, although weather conditions did not often allow direct observation. Since about 4 days ago, tremor has been showing a slowly rising trend, although it is still at low levels.

Small ash eruption from the New SE crater this morning (Etna-Trekking webcam)

 

http://www.volcanodiscovery.com/etna/current-activity.html

Edited September 22, 2013 by john pike

[john pike]

Santiaguito volcano (Guatemala): strong explosion and pyroclastic flows

Sunday Sep 22, 2013 21:10 PM | BY: T

Explosion and pyroclastic flows from Santiaguito yesterday morning (INSIVUMEH)

 

http://www.volcanodiscovery.com/guatemala/santiaguito/news/37377/Santiaguito-volcano-Guatemala-strong-explosion-and-pyroclastic-flows.html

 

Another violent eruption occurred at the lava dome yesterday morning (21 Sep) at 8:30 local time. Accompanied by explosions, the Caliente dome suddenly produced a series of major pyroclastic flows triggered by collapse of accumulated viscous lava at the southeastern rim rim and flank of the dome. The flows descended on all sides of the lava dome.

The explosions, accompanied by shock waves that could be heard in 20 km radius, produced an ash plume that rose to about 4.5 km altitude or about 2 km height above the crater. Significant (but smaller compared) ash plume rose from the pyroclastic flows. Ash fall occurred in Quetzaltenango, Santa María de Jesús, Zuníl and other areas downwind.

There has been no recognized precursor to the eruption, illustrating that the activity of the lava dome is highly unpredictable and potentially extremely dangerous. A similar eruption occurred almost exactly one month ago.

[john pike]

It was recently reported that a very rare triple swarm of earthquakes rocked Yellowstone National Park. In fact, Bob Smith, a geophysics professor out of the University of Utah, says he has never seen even two swarms occur together before in all the 53 years that he has been monitoring seismic activity. Now, he he's seen three. An earthquake swarm, seismologists say, is an event where a sequence of earthquakes occurs in a limited geographic area over a short period of time. Speaking about the event, Smith called it "remarkable," asking, "How does one swarm relate to another? Can one swarm trigger another and vice versa?" No answers are available to Smith's questions, however, because simultaneous swarms haven't been detected before. Smith says he believes that at least two of the swarms are probably related to each other though. The three swarms hit in the following areas: Lewis Lake, the Lower Geyser Basin and the northwest part of Norris Geyser Basin.

Earlier this month, on September 15, the largest earthquake to rock Yellowstone in over a year occurred about six miles north of the Old Faithful Geyser. Its magnitude was about 3.6 at its epicenter. It takes a magnitude of about 3.0 for people to feel it, a Yellowstone representative named Al Nash told the Jackson Hole News and Guide. The recent swarms of earthquakes began on September 10 and finished up on September 16. The University of Utah put out a statement saying that altogether 130 earthquakes with magnitudes ranging from 0.6 to 3.6 occurred in the area, with most of them being located in the Lower Geyser Basin. But, including many smaller events which were not detected, there were many more quakes than this. The recent swarms produced four earthquakes which, although they were not large, were significant enough in size to be felt. The first, which had a magnitude of 3.5, happened on September 13, about 17 miles northeast of West Yellowstone, Montana. The next two tremblors to be felt occurred early on the morning of September 15 with magnitudes of 3.2 and 3.4 respectively. These two occurred in rapid succession, with one being detected at 5:10 AM and the other at 5:11 AM. The quakes happened about 15 miles southeast of West Yellowstone. The largest earthquake recording during the swarm, a 3.6, was measured nearby about 4 1/2 hours later.

According to Nash, a strong enough earthquake, like the 7.3-7.5 quake that shook the Hebgen Lake area in 1959, has the potential to change the activity of the geysers in the area. And, in fact the 1959 quake did. It caused nearly 300 features to erupt, included 160 where there were no previous records of geysers. None of the current earthquakes were powerful enough to create these types of changes, however. Smith says he believes that the current swarms of earthquakes may, in fact, be related to the 1959 earthquake. "We think that much of the seismicity is still aftershocks from that event in 1959. It can go on for hundreds of years." Usually only about half a dozen earthquakes occur each year in Yellowstone, Smith noted, so it is quite unusual for this level of swarm activity to rock the park.

 

http://hisz.rsoe.hu/alertmap/site/?pageid=event_update_read&edis_id=EQ-20130916-40957-USA&uid=14341

[The PIT]

YVO don't seem to be concerned too much.

 

YELLOWSTONE VOLCANO (CAVW #1205-01-)
44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

The University of Utah, a YVO member agency, has sent out the following press release about a magnitude 3.6 earthquake that occurred amid three ongoing earthquake swarms in Yellowstone National Park.

The current earthquake swarms are well within established norms for the Yellowstone region and the Yellowstone Volcano Observatory has determined that they present no volcanic hazard.

[john pike]

Hi pit

Noones saying about eruptions here

More the fact that a triple swarm is unusual

Start seeing 5plus quakes then that maybe more concerning

[john pike]

Volcanic activity worldwide 24 Sep 2013: Fuego, Klyuchevskoy, Sakurajima, Santa María / Santiaguito...

Tuesday Sep 24, 2013 19:50 PM |

Ash emission from Etna's New SE crater this morning

Klyuchevskoy volcano last evening (this morning GMT) with glow from the active lava flow

Eruption plume from Sakurajima this evening

Ash emission from Popocatépel this morning

View of Santiaguito with a small explosion this morning

The new lava flow on Fuego volcano this morning

Steam emission (with ash?) from Reventador yesterday

 

 

 

 

 

 

 

Etna (Sicily, Italy): Weak strombolian activity and ash emissions continue from the New SE crater. Tremor amplitude continues to rise very slowly.

Klyuchevskoy (Kamchatka): Strombolian activity, strong degassing, and the effusion of a lava flow on the upper flank continue. The following video shows this activity over the past day:


Sakurajima (Kyushu, Japan): Activity remains at high levels with near-constant ash venting and frequent and often large vulcanian explosions (ash plumes rising to 10,000 ft / 3 km altitude and more). Today's activity seen from the south:


Batu Tara (Sunda Islands, Indonesia): Eruptions that produce relatively large ash plumes spotted on satellite imagery, and typically rising to 7-8,000 ft (2.1-2.4 km) altitude, have been occurring daily over the past days.

Sinabung (Sumatra, Indonesia): No more eruptions have taken place during the past days.Authorities allowed about 6,000 of the more than 10,000 reported evacuees to return to their homes.

Dukono (Halmahera): Activity (strombolian to vulcanian explosions from the crater) is currently at relatively high levels. An ash plume rose to 10,000 ft (3 km) altitude yesterday, and a weak SO2 plume can be detected on satellite data.

Lokon-Empung (North Sulawesi, Indonesia): No more explosions have occurred and degassing also has been much reduced recently. While the latest eruptive phase seems to be thus over, it is only a matter of time when the next one will occur.

Kilauea (Hawai'i): Lava effusion through the tube system of the Peace Day flow continues. Due to blocking of the former tube, new breakouts of surface flows are currently found and accessible on the upper pali in the Royal Gardens area at about 16000 ft elevation (about 3-4 hours one way hike).

Veniaminof (Alaska Peninsula, USA): The Alaska Volcano Observatory recently lowered the alert status from Orange/Watch to Yellow/Advisory. Although some weak tremor continues to be recorded under the caldera, no more eruptive activity seems to have taken place during the past weeks. The lava flows and the new cinder cone that was built inside the caldera are now cooling.

Popocatépetl (Central Mexico): No significant changes in activity have occurred. The number of small emissions has sunken to less than one per hour average. The largest during the past 24 hours occurred this morning producing an ash plume rising 1.5 km above the crater.

Santa María / Santiaguito (Guatemala): After the violent explosion and partial dome collapse 3 days ago, the lava dome has returned to its typical comparably low activity. Two explosions of moderate size were observed this morning at 5:47 and 6:00 am local time, with ash plumes rising about 500 m. Ash fall occurred in the area of Monte Claro.

Pacaya (Guatemala): INSIVUMEH reports continuing strombolian activity with explosions at intervals of 30 seconds to 3 minutes. Glowing bombs are thrown to heights of 50-100 m above the rim of the crater.

Fuego (Guatemala): A new lava flow has appeared during the past days and is currently flowing from the summit crater towards the Trinidad canyon (SE side) with a length of 300 m this morning. Weak glowing avalanches detach from its front.
Explosive activity in turn has weakened and consisted of strombolian eruptions with ash plumes of 2-400 m height and incandescent material being ejected to about 100 m above the crater.

Reventador (Ecuador): Activity (as far as could be observed) has been a bit calmer with less frequent explosions during the past days, but essentially remains unchanged. Seismic activity is at moderate to high levels and a thermal hot spot is visible at the summit.

Edited September 24, 2013 by john pike

[john pike]

VONA/KVERT DAILY REPORT
Kamchatkan and Northern Kuriles Volcanic Activity
September 24, 2013, all time is UTC

SHEVELUCH VOLCANO (CAVW #1000-27-)
56.64 N, 161.32 E; Elevation 10768 ft (3283 m), the dome elevation ~8200 ft (2500 m)
Aviation Color Code is ORANGE

Strong and moderate seismic activity of the volcano was registered. A viscous lava flow continues to effuse on the northern flank of the lava dome, incandescence of the dome summit, short ash explosions up to 15,700 ft (4.8 km) a.s.l. and hot avalanches accompanies this process. Satellite data showed a thermal anomaly over the volcano.

KLYUCHEVSKOY VOLCANO (CAVW #1000-26-)
56.06 N, 160.64 E; Elevation 15580 ft (4750 m)
Aviation Color Code is ORANGE

Moderate seismic activity of the volcano continues. An amplitude of volcanic tremor was 12.77 mcm/s. Lava flows effuse on the western flanks of the volcano. Satellite data showed a big thermal anomaly over the volcano.

KARYMSKY VOLCANO (CAVW #1000-13-)
54.05 N, 159.44 E; Elevation 4874 ft (1486 m)
Aviation Color Code is ORANGE

Moderate seismic activity of the volcano continues. Satellite data showed the volcano was obscured by clouds.

BEZYMIANNY VOLCANO (CAVW #1000-25-)
55.97 N, 160.6 E; Elevation 9453 ft (2882 m)
Aviation Color Code is YELLOW

Strong seismic activity of Klyuchevskoy volcano obscured seismicity of Bezymianny. Video data showed a moderate gas-steam activity of the volcano. Satellite data showed the volcano was obscured by clouds.

PLOSKY TOLBACHIK VOLCANO (CAVW #1000-24-)
55.83 N, 160.39 E; Elevation 10119 ft (3085 m)
Aviation Color Code is YELLOW

Weak seismicity of the volcano was registered. According to video data, the volcano was quiet. Satellite data showed the volcano was obscured by clouds.

KIZIMEN VOLCANO (CAVW #1000-23-)
55.13 N, 160.32 E; Elevation 8151 ft (2485 m)
Aviation Color Code is YELLOW

Moderate seismic activity of the volcano continues. According to video data, a moderate gas-steam volcanic activity was observed. Satellite data showed the volcano was obscured by clouds.

GORELY VOLCANO (CAVW #1000-07-)
52.56 N, 158.03 E; Elevation 5996 ft (1828 m)
Aviation Color Code is YELLOW

There was no seismic data by technical reasons. According to video and satellite data, the volcano was quiet or obscured by clouds.

 

 

http://www.kscnet.ru/ivs/kvert/van/

[john pike]

Nicaraguan on alert after volcano blast Updated: 07:35, Thursday September 26, 2013  

A volcano in Nicaragua has erupted with a mighty blast and a column of ash, then quietened down again, the government said.

No one was hurt but villagers near the Telica volcano in the northwest of the Central American nation were told to remain on alert.

The mountain is about 1000 metres tall.

The morning blast spewed ash 50 metres into the air, said Guillermo Gonzalez of the National System for Preventing and Mitigating Disasters.

After the single blast, civil defence staff remained on site to gather information.

Villagers were put on alert and told to protect their water and food sources.

 

http://www.skynews.com.au/world/article.aspx?id=909504

Etna volcano current activity: ash emissions from New SE crater

Update Thu 26 Sep 10:30

Explosion yesterday evening (25 Sep) from Etna's New SE crater (photo: Marco Restivo / www.etnawalk.it)

Strombolian activity continues at the New SE crater. Whether (and when) this might lead to another paroxysm is unclear. The volcanic tremor signal is still relatively low.

Update Tue 24 Sep 18:33

Weak strombolian activity and ash emissions continue from the New SE crater. Tremor amplitude continues to rise very slowly.

 

http://www.volcanodiscovery.com/etna/current-activity.html

Edited September 26, 2013 by john pike

[john pike]

Video Of New Powerful Merapi Volcano Eruption In Indonesia Video Of Recent Effective Merapi Volcano

 

http://www.youtube.com/watch?v=koNl-u5RqdA&feature=player_embedded#t=0

[The PIT]

Nice Video. Wouldn't have liked being close to the pyroaclastic flow

[john pike]

September 27, 2013 – ITALY – It would seem a new volcanic vent has formed and is ejecting gas and sand about 100 meters off the coast of Fiumicino, west of Rome: the phenomenon has started less than 24 hours ago and the mayor Outside Montino, along with his staff and experts from the National Institute of Geophysics and Volcanology are headed to the scene to the foothills. At the moment in fact there is no news about the possible links that you have between this event and the past, showing the opening of many volcanoes in two Viale Coccia di Morto. On August 27, a volcanic vent opened up near Fiumicino, ejecting steam and gas- these two events could to be related and may suggest the geology under Italy is in the midst of massive changes. There are dozens of active, and very restless volcanoes sitting on the sea floor of the Tyrrhenian Sea. –CMI, TEP

 

http://www.centrometeoitaliano.it/vulcanetto-in-azione-a-largo-della-costa-laziale-video-1717/

 

report in italian but has video via link

 

more info waiting on this

[john pike]

Volcanoes Today, 29 Sep 2013: Sakurajima, Jebel Zubair, Etna

Sunday Sep 29, 2013 15:03 PM |

Current tremor signal (ESLN station, INGV Catania)

Powerful strombolian explosion from Sakurajima at 13:48 UTC on 27 Sep (22:48 local time)

Steam plume and discolored water around the new submarine eruption site (NASA / Terra satellite image 28 Sep, annotated by Blog Culture Volcan)

Etna (Sicily, Italy): Activity at the New SE crater has eased for now. Some occasional small strombolian explosions were last noted about 2 days ago. Tremor amplitude has decreased slightly as well.

Sakurajima (Kyushu, Japan): Activity fluctuates on a scale of few days, but remains at relatively high levels overall. Explosions from the Showa crater often follow each other at intervals of few hours, and ash plumes regularly surpass 10,000 ft altitude (something that had been more rare during the past years).

Most explosions are of vulcanian type (strong fragmentation of solid material blocking the vent, generation of tall ash plumes, often with shock waves and explosion sounds) and more rarely strombolian, with mainly incandescent lava ejected in fountains of several hundred meters and only little ash.

Following most explosions, the volcano usually continues to near-constantly emit ash plumes of various size for several hours. These plumes, when observed during the past days, were up to about 500 m tall, with sometimes weak strombolian activity visible reaching above the crater rim.

 

 

 

 

Jebel Zubair (Red Sea): A submarine eruption started yesterday (28 Sep) NW of the island Jebel Zubair and SW of the site of the 2011-12 eruption. The activity manifestated itself in form of a strong SO2 anomaly and steam plume spotted on satellite imagery.

No signs of activity are visible on images taken on 27 Sep, which confirms that the eruption started yesterday.

The presence of the significant steam plume suggests that the eruption vent is a shallow depth (less than 100 m), and possibly in the stage of producing so-called surtseyan activity (violent steam-driven explosions breach the surface with jets of water and steam, and become more and more rich in lava fragments as the vent becomes shallower). often

[john pike]

HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE Sunday, September 29, 2013 7:25 AM HST (Sunday, September 29, 2013 17:25 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). Hawai`i Volcanoes National Park status can be found at http://www.nps.gov/havo/ or 985-6000. All times are Hawai`i Standard Time.

KILAUEA VOLCANO (CAVW #1302-01-)
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: Eruption at two locations continued with no significant changes. Summit instruments recorded continuing weak inflationary tilt while the lava lake level continued to rise about 2-3 m (7-10 ft) per day. At the middle east rift zone, the Kahauale`a 2 lava flow was active as multiple breakouts still burning two patches of forest north of Pu`u `O`o. The Peace Day flow southeast of Pu`u `O`o hosted at least one breakout at the top of the pali which is reported visible from Kalapana. Gas emissions remained elevated.

Recent Observations at Kilauea summit: Summit tiltmeters recorded continuing weak inflationary tilt (about +0.4 microradians/day) since Sept. 22. The lava lake level continued to rise and, this morning, stands about 43-44 m (141-144 ft) below the Halema`uma`u Crater floor. Gas emissions continued to be elevated: the most recent sulfur dioxide emission rate measurement was 700 t/d on September 27, 2013 - the higher value represents a period in which spattering activity and gas release from the lava lake were active; however, all of these values are minimums because the data were acquired close to the vent where the plume is most dense and challenging to fully characterize. Although not measured this morning, a small amount of ash-sized tephra (mostly fresh spatter bits and Pele's hair from the spattering sinks) was probably carried out of the vent with the gas and deposited onto nearby surfaces.

Seismic tremor levels fluctuated but remained low with no dropouts. Nine earthquakes were strong enough to be located beneath Kilauea Volcano in the past 24 hours: 1 south of Halema`uma`u Crater, 4 within the upper east rift zone, and 4 on south flank faults. GPS receivers spanning the summit caldera respond to the short-term changes in tilt (DI tilt events) over a trend of slow contraction since August 26th.

 

 

http://volcanoes.usgs.gov/activity/archiveupdate.php?noticeid=9167

[john pike]

Source of the great A.D. 1257 mystery eruption

unveiled, Samalas volcano, Rinjani Volcanic

Complex, Indonesia

 

http://www.pnas.org/content/early/2013/09/26/1307520110.full.pdf+html

 

interesting read

[john pike]

Volcanic activity worldwide 1 Oct 2013: Klyuchevskoy, Monte Albano, Ulawun, Copahue, Karymsky, Shive...

Tuesday Oct 01, 2013 14:57 PM |

Small ash plume from Klyuchevskoy volcano this morning

Kizimen volcano this morning (KVERT webcam)

Small avalanche from Shiveluch volcano (photo: Andrey Matseevskiy)

SO2 plume from Ulawun volcano (NOAA)

Ash emission from Copahue yesterday (Caviahue webcam)

 

 

 

 

 

 

Monte Albano (Italy): A second (and much more violent) geyser-like fumarole or mudvolcano recently appeared off shore near Fumiciono, approx. 100 meters out from the beach in the area where the new port of Rome is being built. It is an underwater vent that produces fountains of upwelling sediment-rich water driven by strong degassing from the sea floor:

... [read more]

Gorely (Southern Kamchatka): KVERT has no seismic data due to technical problems. The volcano continues to produce strong degassing, but has not erupted.

Klyuchevskoy (Kamchatka): Activity remains strong. A small explosion this morning produced an ash plume rising about 700 m above the summit and drifting 50 km to the east. The lava flow remains active and can be seen on webcam images at night.

Kizimen (Kamchatka): Activity (extrusion of lava at the summit) continues, but has decreased recently, as incandescent rockfalls have become more rare. Seismic activity remains "moderate" (KVERT) and strong degassing can be seen. About a week ago, the prominent spine at the summit dome collapsed.

Karymsky (Kamchatka): KVERT reported an explosion that produced an ash plume rising to 5-6,000 ft (1.5-1.7 km) altitude and drifted 30 km ESE. Seismic activity is moderate and a thermal hot spot at the summit is visible on satellite data.

Shiveluch (Kamchatka): Activity continues at moderate levels with little changes. The viscous lava dome remains active and produces occasional small ash explosions and avalanches.

Tolbachik (Kamchatka): No seismic or surface eruptive activity has been recorded recently. The eruption can probably by now be regarded to be over, but KVERT maintains Aviation Color Code yellow.

Bezymianny (Central Kamchatka Depression): The strong seismic activity of nearby Klyuchevskoy volcano obscured the seismicity of Bezymianny, which likely remains active with slow extrusion of its lava dome. Video data showed a moderate gas-steam activity of the volcano (KVERT).

Rabaul (Tavurvur) (New Britain, Papua New Guinea): Activity continues. The latest NOAA satellite image data shows increased SO2 emissions.

Ulawun (New Britain, Papua New Guinea): A relatively strong eruptive phase seems to be occurring at the volcano. An ash plume rose to 12,000 ft (3.6 km) altitude last evening and a significant SO2 plume is visible on satellite data.

Batu Tara (Sunda Islands, Indonesia): Relatively frequent larger strombolian to vulcanian explosions continue to produce ash plumes regularly spotted on satellite data. The ash plumes reach altitudes of about 7,000 ft (2.1 km).

Dukono (Halmahera): Ash emissions have been seen on satellite data during the past days, confirming significant ongoing explosive activity.

Copahue (Chile/Argentina): New ash emissions started last night. The increase of activity also manifested itself in visible incandescence since the night of 26-27 Sep. The volcano had been quiet since the last time similar ash emissions and some incandescence were spotted in mid August. Sernageomin has not (yet) commented on this new activity.

[john pike]

Volcanoes Today, 2 Oct 2013: Lewotobi, Jebel Zubair
Wednesday Oct 02, 2013 10:03 AM |
MODIS / Terra satellite image 1 Oct showing the steam plume from the eruption
MODIS / Terra satellite image 1 Oct showing the steam plume from the eruption

 

 

Lewotobi (Flores): Following an increase in seismic activity recorded since 28 September, VSI raised the alert level to 2 ("Waspada","watch") on a scale of 1-4. No changes in surface activity, degassing from fumarole vents, has been noted.

Jebel Zubair (Red Sea): As of yesterday morning when the latest MODIS satellite image was taken from the area, the eruption continued with little changes.
A video has appeared showing the activity (from distance) on the first day of the eruption:

 

Edited October 2, 2013 by john pike

[Crepuscular Ray]

http://www.bbc.co.uk/news/science-environment-24375112

 

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