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Smithsonian/USGS Weekly Volcanic Activity Report 28 March to 3 April 2012 5 April 2012

Posted by admin in activity reports, Alaska, Caribbean, Chile, Cleveland, Colombia, Ecuador, Etna, Fuego, Guatemala, Hawaii, Iliamna, Indonesia, Italy, Kamchatka, Karymsky, Kilauea, Lewotobi, Mexico, Nevado del Ruiz, Popocatépetl, Puyehue, Russia, Shiveluch, Soufrière Hills, Sundoro, Tengger Caldera, Tungurahua, United States, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 28 March to 3 April 2012. The report is compiled by Sally Kuhn Sennert. Among the highlights of this week:

  • Alert level at Clevelandraised as a new lava dome becomes evident
  • A significant increase in seismicity at Nevado del Ruiz brings a rise in the alert level
  • High levels of sulphur dioxide emissions at Soufrière Hills
  • Another paroxysmal eruptive episode at Etna with lava fountaining and ashfall

SI/USGS Weekly Volcanic Activity Report 28 March to 3 April 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 28 March to 3 April 2012 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Cleveland (Alaska, USA), Fuego (Guatemala), Iliamna (Alaska, USA), Lewotobi (Indonesia), Nevado del Ruiz (Colombia), Soufrière Hills (Montserrat), Sundoro (Indonesia).

Ongoing activity: Etna (Italy), Karymsky (Russia), Kilauea (Hawaii, USA), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Shiveluch (Russia), Tengger Caldera (Indonesia), Tungurahua (Ecuador).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 14-20 March 2012 22 March 2012

Posted by admin in activity reports, Caribbean, Chile, Cleveland, Colombia, Ecuador, Etna, Hawaii, Iliamna, Italy, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Mexico, Nevado del Ruiz, Popocatépetl, Puyehue, Russia, Sakura-jima, Shishaldin, Soufrière Hills, Tungurahua, United States, Villarrica, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 14-20 March 2012. The report is compiled by Sally Kuhn Sennert. Among the highlights of this week:

  • A plume, probably water vapour, seen from Iliamna, where seismicity remained elevated
  • Seismicity decreased at Nevado del Ruiz but significant gas emissions continued
  • Etna continued lively with lava flows and fountaining, and strong ash emission
  • Daily explosions at Shiveluch produced plumes which reached 3-5 km altitude

SI/USGS Weekly Volcanic Activity Report 14-20 March 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 14-20 March 2012 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Iliamna (Alaska, USA), Nevado del Ruiz (Colombia).

Ongoing activity: Cleveland (Alaska, USA), Etna (Italy), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Popocatépetl (Mexico, Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Shiveluch (Russia), Soufrière Hills (Montserrat), Tungurahua (Ecuador), Villarrica (Chile).

Note: ‘a.s.l.’ = ‘above sea level’.

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Smithsonian/USGS Weekly Volcanic Activity Report 7-13 March 2012 15 March 2012

Posted by admin in activity reports, Alaska, Bezymianny, Chile, Cleveland, Colombia, eruptions, Hawaii, Ijen, Iliamna, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Lamongan, Marapi, Nevado del Ruiz, Puyehue, Russia, Sakura-jima, Santa María, Shiveluch, Tungurahua, United States, Villarrica, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 7-13 March 2012. The report is compiled by Sally Kuhn Sennert. Some of the news from a week that has seen quite a lot of new activity:

  • An explosive eruption at Bezymianny sent ash up to 8 km altitude
  • Activity at Nevado del Ruiz marked by explosions, ash emissions and increased seismicity
  • Cleveland stirs with small explosive eruptions
  • Explosions at Santa María produce localized ashfall

SI/USGS Weekly Volcanic Activity Report 7-13 March 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 7-13 March 2012 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Bezymianny (Russia), Cleveland (Alaska, USA), Ijen (Indonesia), Iliamna (Alaska, USA), Lamongan (Indonesia), Marapi (Indonesia), Nevado del Ruiz (Colombia), Tungurahua (Ecuador).

Ongoing activity: Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Villarrica (Chile).

Note: ‘a.s.l.’ = ‘above sea level’.

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Cleveland, Alaska: another small explosion 15 March 2012

Posted by admin in activity reports, Alaska, Cleveland, eruptions, Iliamna, United States.
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Cleveland volcano in the Aleutians had another small eruption on the afternoon of 13 March, reports the Alaska Volcano Observatory, the third such event in a week (the previous eruptions were on 7 March and 10 March). The AVO status report, issued on 14 March at 1134 local time (1934Z) describes what happened:

Yesterday afternoon at approximately 2:55 pm AKDT (22:55 UTC), AVO infrasound and seismic networks detected a small explosion at Cleveland. Clouds prevented a clear view of the volcano at the time of the explosion, however, ash was not observed rising through the cloud deck suggesting relatively minor ash emission.

The Volcano Alert Level for Cleveland remains at Watch, the Aviation Colour Code at Orange. The same report notes that seismicity remains elevated at Iliamna volcano (which remains at Yellow/Advisory).

News
Cleveland volcano explodes for the third time – alaskapublic.org, 14 March 2012

Information
Global Volcanism Program: Cleveland – summary information for Cleveland (1101-24-)
Global Volcanism Program: Iliamna – summary information for Iliamna (1103-02-)
AVO Cleveland Activity Page – information on current activity at Cleveland
AVO Iliamna Activity Page – information on current activity at Iliamna
Alaska Volcano Observatory – AVO main page

The Volcanism Blog

Alaska: another small explosion at Cleveland 11 March 2012

Posted by admin in activity reports, Alaska, Cleveland, eruptions, Iliamna, United States.
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The Alaska Volcano Observatory reports another small explosive event at Cleveland volcano, following the small explosion detected on 7 March. This one happened in the afternoon (local time) of 9 March, as the AVO Volcanic Activity Notification reports:

Another small, short duration explosion from Cleveland Volcano was detected on distant seismic stations and infrasound arrays on about 1:55 March 10, UTC (4:05 PM March 9, AKST.) No ash cloud from this event was detected in satellite imagery probably due to cloudy weather conditions. This explosion was similar to recent small events that occurred on March 7 and in December 2011. These events produced small ash clouds that dissipated quickly and did not affect air traffic.

The Volcano Alert Level for Cleveland remains at Watch, the Aviation Colour Code at Orange. The same report gives an update on Iliamna, where seismic activity remains above background. Iliamna’s alert status is currently one notch below Cleveland’s, at Volcano Alert Level Advisory, Aviation Colour Code Yellow.

News
Cleveland volcano rocked by explosionAnchorage Daily News, 10 March 2012.

Information
Global Volcanism Program: Cleveland – summary information for Cleveland (1101-24-)
Global Volcanism Program: Iliamna – summary information for Iliamna (1103-02-)
AVO Cleveland Activity Page – information on current activity at Cleveland
AVO Iliamna Activity Page – information on current activity at Iliamna
Alaska Volcano Observatory – AVO main page

The Volcanism Blog

Alert level raised at Iliamna volcano, Alaska 10 March 2012

Posted by admin in activity reports, Alaska, Iliamna, United States.
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Increased seismic activity has been evident at Iliamna volcano in Alaska since late last year. The Alaska Volcano Observatory has been watching Iliamna closely, and has decided that the elevated activity is significant enough to merit an increase in the volcano’s alert level. The new status of Iliamna is Advisory/Yellow. The AVO volcanic activity notice reads as follows:

Over the past three months the earthquake rate at Iliamna Volcano has steadily increased and now exceeds normal background levels. Although it is not certain that this sustained increase in earthquake activity represents the movement of magma at depth, it is a significant change and AVO has increased the Alert Level to Advisory and the Aviation Color Code to Yellow. The current activity does not mean an eruption is imminent or certain. A similarly energetic episode of seismic unrest from September 1996 to February 1997 was likely related to the intrusion of new magma at depth, but an eruption did not occur.

Iliamna has a real-time seismic network, and AVO will continue to monitor the volcano’s activity closely.

News
Alert level raised for Alaska volcano – WKYC, 9 March 2012
Alert level raised for Alaska’s Iliamna volcanoAlaska Dispatch, 9 March 2012
Increased seismic activity prompts alert level change for Alaska volcanoWashington Post, 9 March 2012

Information
Global Volcanism Program: Iliamna – summary information for Iliamna (1103-02-)
AVO Iliamna activity page – AVO page for Iliamna activity
Alaska Volcano Observatory – AVO main page

The Volcanism Blog

Alaskan activity update: Cleveland and Iliamna (updated) 9 March 2012

Posted by admin in activity reports, Alaska, Cleveland, eruptions, Iliamna, United States.
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Beautiful, symmetrical Cleveland volcano in the Aleutians, which has been rumbling on and off over the last few months as its lava dome has grown, produced a small eruption last night, reports the Alaska Volcano Observatory:

A small, short duration explosion was detected from Cleveland Volcano on distant seismic stations and infrasound arrays. The time of the explosion was approximately 4:05 UTC March 8 (7:05 PM March 7, AKST.) Weather cloud conditions prevented the detection of an eruption cloud in satellite images or visual observation of the summit. This explosion was similar to recent small events that occurred in December 2011 and produced small ash clouds that dissipated quickly and did not affect air traffic. At this time, no further activity has been detected.

Alaska Public Radio gets a bit over-excited, reporting that ‘Cleveland Volcano has blown its top again’. Talking of Cleveland blowing its top is putting it a little strongly. This latest eruption, as AVO says, was a small event. There may well be more of this kind of small-scale explosion, often caused by localized rock fracturing and movement, as the lava dome continues to grow. Cleveland does not have a real-time seismic monitoring network, but AVO will continue to monitor Cleveland closely. Cleveland is currently at Orange/Watch.

UPDATE. An article in the Anchorage Daily News quotes Steve McNutt of the Alaska Volcano Observatory airing the possibility that the explosion last night may have ‘blasted away a lava dome building inside the volcano’s summit crater’. AVO volcanologists are hoping that satellite images will shortly show what exactly happened during this eruption. It will be interesting to see if all or part of the lava dome has indeed gone missing.

Another Alaskan volcano, Iliamna, which does have real-time seismic monitoring, has been experiencing episodes of increased earthquake activity and is being carefully watched by AVO. So far the alert status for Iliamna has not been raised and remains at Green/Normal.

News
4.1 earthquake comes as scientists watch Alaska’s Iliamna volcanoAlaska Dispatch, 8 March 2012
Explosion detected at Alaska’s Cleveland volcanoAlaska Dispatch, 8 March 2012
Two Alaska volcanoes show signs of activityChicago Tribune, 8 March 2012
Seismic stations pick up Cleveland blast – alaskapublic.org, 8 March 2012
Blast shakes restless volcano in remote Aleutian IslandsAnchorage Daily News, 8 March 2012

Information
Global Volcanism Program: Cleveland – summary information for Cleveland (1101-24-)
Global Volcanism Program: Iliamna – summary information for Iliamna (1103-02-)
AVO Cleveland Eruption Page – information on current activity at Cleveland
Alaska Volcano Observatory – AVO main page

The Volcanism Blog

Smithsonian/USGS Weekly Volcanic Activity Report 29 February – 6 March 2012 8 March 2012

Posted by admin in activity reports, Alaska, Bagana, Bezymianny, Canary Islands, Chile, Cleveland, Ecuador, eruptions, Etna, Fuego, Guatemala, Hawaii, Hierro, Italy, Japan, Kamchatka, Kanaga, Karymsky, Kilauea, Kizimen, Mexico, Papua New Guinea, Popocatépetl, Puyehue, Russia, Sakura-jima, Santa María, Shiveluch, Spain, Suwanose-jima, Tungurahua, United States, Weekly Volcanic Activity Reports.
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The latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report has been published by the Global Volcanism Program, covering the week 29 February to 6 March 2012. The report is compiled by Sally Kuhn Sennert. Some of the highlights of the volcanic week:

  • Continuing activity at Etna including strombolian eruptions, lava fountaining and lava flows
  • Explosions at Fuego produced plumes that reached 0.6 km above the crater
  • Plumes rose to 1 km above Puyehue-Cordón Caulle as low-level eruptive activity continues

SI/USGS Weekly Volcanic Activity Report 29 February - 6 March 2012

Click on the map for a larger version (1211 x 784 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 February – 6 March 2012 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Bezymianny (Russia), Cleveland (Alaska, USA), Etna (Italy), Kanaga (Alaska, USA), Tungurahua (Ecuador).

Ongoing activity: Bagana (Papua New Guinea), Fuego (Guatemala), Hierro (Canary Islands), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Popocatépetl (Mexico), Puyehue-Cordón Caulle (Chile), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Suwanose-jima (Japan).

Note: ‘a.s.l.’ = ‘above sea level’.

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Kanaga quietens: alert level lowered 3 March 2012

Posted by admin in activity reports, Alaska, Kanaga, United States.
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A couple of weeks ago eruptive activity was reported at Kanaga volcano in the Aleutian Islands: Eruptions has all the information and relevant links, as well as one of those impressive, almost abstract, coldly beautiful Alaskan volcano pictures. It seems that the rumblings have ceased, and the Alaska Volcano Observatory has lowered the Alert Level for Kanaga from Advisory to Normal, and the Aviation Color Code from Yellow to Green.

News
Alert level for Kanaga Volcano lowered – Alaska Public Radio, 2 March 2012
Alert level reduced for remote Aleutians volcanoAnchorage Daily News, 3 March 2012

Information
Global Volcanism Program: Kanaga – summary information for Kanaga (1101-11-)
Alaska Volcano Observatory – main page for the AVO

The Volcanism Blog

The Daily Volcano Quote: bombing Mauna Loa 2 March 2012

Posted by admin in daily volcano quote, Hawaii, Mauna Loa, United States.
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From the Army’s Hickham Field outside Pearl Harbor huge bombers departed five weeks ago on a new kind of mission. Their assignment was to bomb the famed volcano, Mauna Loa, on the island of Hawaii, 200 miles away. On April 26 restless Mauna Loa had rumbled into new activity, hurling tons of molten rock into the Pacific sky. Two days later, fountains of lava spouted from two fissures in the moutain-side, a few thousand feet below the summit. Like red snakes, twin lava rivers coiled down Mauna Loa’s skirts, piling up great ramparts of hot rock, firing forests, imperiling the city and harbour of Hilo, and threatening to dam its water supply. To divert these angry streams Army airmen dropped bombs in their path … By May 10 the disturbance had slackened, Hilo was safe, and Mauna Loa had subsided again into smoky slumber.

‘Army bombs Mauna Loa volcano to divert lava flow from Hilo Harbor’, Life, 1 June 1942, p. 36. The Hawaiian Volcano Observatory has an account of the 1942 eruption and the attempt to divert the lava by aerial bombing, noting that ‘Though most appeared to hit their mark, the bombs had little or no impact on the eruption or on the flow’s direction’.

The Daily Volcano Quote: from Monday to Friday, a new eruption of volcanic verbiage each day.

The Volcanism Blog

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