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Smithsonian/USGS Weekly Volcanic Activity Report 29 June – 5 July 2011 7 July 2011

Posted by admin in activity reports, Africa, Batu Tara, Chile, Dukono, Eritrea, eruptions, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kirishima, Kizimen, Kliuchevskoi, Lokon-Empung, Nabro, Philippines, Puyehue, Sakura-jima, Santa María, Shiveluch, Soputan, Taal, United States, Weekly Volcanic Activity Reports.
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Here is the latest Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Report which covers the week 29 June – 5 July 2011, and is compiled by Sally Kuhn Sennert. Some of the highlights:

  • Kliuchevskoi: eruption produces a plume to 7 km altitude
  • Nabro: lava flows remain hot, brown ash plume rising from vent
  • Puyehue-Cordón Caulle: eruption continues, with active lava flows, and low white/grey plumes
  • Soputan: an apparent strombolian eruption produced 6 km plume and ashfall

SI/USGS Weekly Volcanic Activity Report 22-28 June 2011

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 June – 5 July 2011 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: Kirishima (Japan), Kliuchevskoi (Russia), Lokon-Empung (Indonesia), Nabro (Eritrea), Puyehue-Cordón Caulle (Chile), Soputan (Indonesia).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Karymsky (Russia), Kilauea (Hawaii, USA), Kizimen (Russia), Sakura-jima (Indonesia), Santa María (Guatemala), Shiveluch (Russia), Taal (Philippines).

Note: ‘a.s.l.’ = ‘above sea level’.

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Phivolcs keeps watch on restive Bulusan 9 January 2011

Posted by admin in activity reports, Bulusan, Philippines.
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The island of Luzon’s southernmost volcano, Bulusan, has been showing signs of restiveness recently with November and December 2010 marked by an upswing in seismicity and occasional explosions producing plumes (mostly low-level, but an ash plume reportedly reached 2.1 km a.s.l. on 24 December). The seismic activity has continued into the new year, with the most recent bulletin from Phivolcs reporting five earthquakes during 7-8 January 2011. Phivolcs describes the activity as ‘hydrothermal and shallow’. Bulusan remains at Alert Level 1 and an exclusion zone of 4 km radius around the volcano is in effect.

News
Phivolcs records 5 volcanic quakes around Bulusan – GMANews.tv, 8 January 2011
5 quakes recorded at Mount BulusanManila Bulletin, 8 January 2011

Information
Global Volcanism Program: Bulusan – summary information for Bulusan (0703-01=)
Phivolcs – Philippine Institute of Volcanology and Seismology

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report, 29 December 2010 – 4 January 2011 8 January 2011

Posted by admin in activity reports, Bezymianny, Bulusan, Caribbean, Colombia, Ecuador, eruptions, Etna, Fuego, Gaua, Guatemala, Hawaii, Indonesia, Italy, Japan, Kamchatka, Karymsky, Kilauea, Kizimen, Machín, Manam, Pacific, Papua New Guinea, Philippines, Russia, Sakura-jima, Santa María, Shiveluch, Soufrière Hills, Stromboli, Suwanose-jima, Tengger Caldera, Tungurahua, United States, Vanuatu, Weekly Volcanic Activity Reports.
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The Smithsonian Institution and United States Geological Survey Weekly Volcanic Activity Reports enter their second decade of chronicling what the world’s volcanoes are up to with this week’s report, which covers 29 December 2010 to 4 January 2011 and is compiled by Sally Kuhn Sennert. Some selected highlights:

  • Etna: light ashfall, incandescence, vigorous strombolian activity
  • Manam: new eruptive episode – ash plumes, some dense; incandescence; pyroclastic flows
  • Stromboli: increase in the frequency and intensity of explosions from the S1 vent
  • Machín: increase in low-magnitude volcanic-tectonic seismicity recorded

SI/USGS Weekly Volcanic Activity Report 29 December 2010 - 4 January 2011

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 December 2010 – 4 January 2011 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: Etna (Italy), Kizimen (Russia), Manam (Papua New Guinea), Stromboli (Italy).

Ongoing activity: Bezymianny (Russia), Bulusan (Philippines), Fuego (Guatemala), Gaua (Vanuatu), Karymsky (Russia), Kilauea (Hawaii, USA), Machín (Colombia), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Tengger Caldera (Indonesia), Tungurahua (Ecuador).

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Increased seismicity detected at Taal 30 September 2010

Posted by admin in activity reports, Philippines, Taal.
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The highly active Philippine volcano Taal, situated on the island of Luzon, had a restless summer this year: the alert level was raised by Phivolcs on 8 June 2010 following earthquake swarms and increased steam emissions (further detailed coverage from Eruptions here and here), and was then lowered again on 2 August when Taal appeared to calm down somewhat.

Phivolcs is now reporting a renewed increase in seismic activity at Taal, although observations at the Main Crater and New Eruption areas of the volcano ‘indicated no anomalous observations in the thermal and surface manifestations of both areas’. The alert level has not been changed and remains at Level 1, but the restrictions on approaching the volcano remain in place.

A Philippine news story on Taal also notes that Phivolcs has detected four tremors around Mayon in the last 24 hours.

References to volcano alert levels on this blog are not authoritative and are not necessarily up to date. You should always check with official sources for the latest alert levels.

News
Phivolcs notes increased seismic activities at Taal, Mayon – GMANews.TV, 30 September 2010

Information
Global Volcanism Program: Taal – summary information for Taal (0703-07=)
Philippine Institute of Volcanology and Seismology – website for Phivolcs

The Volcanism Blog

The Daily Volcano Quote: tranquil Mayon 20 September 2010

Posted by admin in daily volcano quote, Mayon, Philippines.
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Thirty years had elapsed, since the Volcano of Albay, called by the natives Mayon, had remained in undisturbed silence: so that it was contemplated without those feelings which volcanoes generally raise in the minds of the neighbours. The last eruption took place in the year 1800, when great quantities of sand, stone, and ashes were thrown up, and caused great damage to the neighbouring villages. From that period nothing occurred to mark a volcano; so that the terror which it had occasioned, began by degrees to evaporate. The lofty brow of the mountain was converted into a pleasant and beautiful garden; and was cultivated with hemp, cocoa-nuts, and many kind of fructiferous trees,with a great quantity of roots and leguminous plants, which, at the same time that they afforded a delightful prospect for the eye, gave support to many industrious families.

From The Gentleman’s Magazine, no. 84, part II (1814), p. 641. This tranquil scene was destroyed by the violent eruption of Mayon in February 1814, which devastated the surrounding area and killed more than 1200 people.

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

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report 2-8 June 2010 9 June 2010

Posted by admin in activity reports, Alaska, Batu Tara, Bezymianny, Cleveland, Dukono, Ecuador, eruptions, Eyjafjöll, Guatemala, Hawaii, Iceland, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mexico, Pacaya, Papua New Guinea, Philippines, Popocatépetl, Russia, Sakura-jima, Santa María, Shiveluch, Taal, Tungurahua, Ulawun, United States, Weekly Volcanic Activity Reports.
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Some highlights from the last week of volcanic activity reported by the Global Volcanism Program:

  • Pacaya: strombolian activity ejects material 200 m into the air
  • Taal: elevated seismicity and inflation causing concern
  • Tungurahua: explosions, ashfall, plumes up to 9 km altitude
  • Eyjafjallajökull: fluctuating tremor, fresh ashfall, plumes up to 4.5 km altitude

SI/USGS Weekly Volcanic Activity Report 2-8 June 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 2-8 June 2010 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), Pacaya (Guatemala), Taal (Philippines), Tiatia (Russia), Tungurahua (Ecuador), Ulawun (Papua New Guinea).

Ongoing activity: Batu Tara (Indonesia), Dukono (Indonesia), Eyjafjallajökull (Iceland), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Popocatépetl (Mexico), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia).

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SI/USGS Weekly Volcanic Activity Report 24 February-2 March 2010 4 March 2010

Posted by admin in activity reports, Caribbean, Costa Rica, Ecuador, eruptions, Fuego, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mayon, Mexico, Pacaya, Philippines, Poás, Popocatépetl, Russia, Sakura-jima, Santa María, Semeru, Shiveluch, Soufrière Hills, Tungurahua, United States, Weekly Volcanic Activity Reports.
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Some highlights from the last week of volcanic activity reported by the Global Volcanism Program:

  • Poás: grey and sulphur-scented sediment thrown out by a phreatic explosion
  • Santa María: ash plumes from the Santiaguito lava dome complex reached 2.8-3.1 km altitude
  • Tungurahua: ash plumes reached 6.5-8.0 km altitude

SI/USGS Weekly Volcanic Activity Report 24 February-2 March 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 24 February-2 March 2010 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: Poás (Costa Rica), Semeru (Indonesia), Soufrière Hills (Montserrat).

Ongoing activity: Fuego (Guatemala), Karymsky (Russia), Kilauea (USA), Kliuchevskoi (Russia), Mayon (Philippines), Pacaya (Guatemala), Popocatépetl (Mexico), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Tungurahua (Ecuador).

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Mayon alert level lowered to 1 2 March 2010

Posted by admin in activity reports, Mayon, Philippines.
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The Philippine Institute of Volcanology and Seismology (Phivolcs) has lowered the alert level for Mayon from 2 (‘moderate unrest’) to the lowest level of 1 (‘no eruption imminent’). Seismic activity at Mayon is well within normal parameters, there is little or no evidence of magmatic movement within the volcano, deformation measurements indicate deflation, sulphur dioxide emissions and steam emissions are normal, and crater glow indicates no intensification of activity. The Phivolcs Mayon bulletin for 2 March 2010 gives the details, along with a warning that there is a continuing danger from sudden small explosions and rockfalls within the 6-km-radius permanent danger zone around the volcano.

For all our Mayon coverage: Mayon « The Volcanism Blog.

News
Mayon alert level lowered to 1 – Phivolcs – Philippines Daily Inquirer, 2 March 2010

Information
Global Volcanism Program: Mayon – summary information for Mayon (0703-03=)
Philippine Institute of Volcanology and Seismology – website for Phivolcs

The Volcanism Blog

SI/USGS Weekly Volcanic Activity Report 6-12 January 2010 13 January 2010

Posted by admin in activity reports, Africa, Alaska, Barren Island, Caribbean, Chaitén, Chile, Congo (Dem. Rep.), Costa Rica, Ecuador, eruptions, Fuego, Guatemala, Hawaii, India, Indian Ocean, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mayon, Mexico, Nyamuragira, Pacaya, Papua New Guinea, Philippines, Piton de la Fournaise, Popocatépetl, Rabaul, Redoubt, Russia, Sakura-jima, Santa María, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, Turrialba, United States, Weekly Volcanic Activity Reports.
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Some of the volcanic activity headlines this week:

  • Mayon: alert level lowered to 2
  • Redoubt: alert level lowered to Normal/Green
  • Tungurahua: gas-and-ash plume rose to 6.5 km altitude
  • Shiveluch: ash plumes reported rising to 4.3-6.4 km altitude
  • Soufrière Hills: extensive pyroclastic flows

SI/USGS Weekly Volcanic Activity Report 6-12 January 2010

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The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 6-12 January 2010 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity/unrest: Mayon (Philippines), Nyamuragira (Democratic Republic of Congo), Piton de la Fournaise (Réunion), Tungurahua (Ecuador), Turrialba (Costa Rica).

Ongoing activity: Barren Island (India), Chaitén (Chile), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Pacaya (Guatemala), Popocatépetl (Mexico), Rabaul (Papua New Guinea), Redoubt (Alaska, USA), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).

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Mayon alert level lowered from 3 to 2 13 January 2010

Posted by admin in activity reports, Mayon, Philippines.
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The Philippine Institute of Volcanology and Seismology (Phivolcs) has lowered the alert level for Mayon from 3 (‘relatively high unrest’) to 2 (‘moderate unrest’). Mayon bulletin no. 31 for 13 January 2010 gives the details:

Seismic activity: ‘The network continues to record a few low frequency-type volcanic earthquakes associated with degassing of residual magma … The lack of remarkable seismic events, such as harmonic tremors, suggests no active transport of magma to shallow levels’.

Ground deformation: ‘Results of precise leveling surveys (05-10 January) at the northwest and southeast slopes of the volcano showed deflationary trend compared to 27 November – 03 December 2009 survey. The electronic tiltmeter installed at the upper northwest slope of the volcano also indicated deflation. These measurements indicate a return of the volcanic edifice to a deflated state, suggesting that no pressure build-up has taken place and reflect a general static condition of residual magma in the volcanic pipe and beneath the crater’.

Gas measurements: ‘Sulfur Dioxide (SO2) emission rate was measured yesterday at an average of 597 tonnes/day (t/d). Measured SO2 levels have decreased considerably from a high of 2,621 t/d to a low of 597 t/d. The decrease in concentration of SO2 gas emission further indicates that no active magma intrusion is occurring beneath the volcanic edifice’.

Visual observation: ‘Steam emission was most of the time weak to moderate and white in color indicating considerable decrease in energy. Crater glow remained visible to the naked eye at night possibly due to the still-hot residual magma beneath the crater’.

For all our Mayon coverage: Mayon « The Volcanism Blog.

News
Phivolcs lowers Mayon alert level to 2 – GMANews.TV, 13 January 2010
Phivolcs lowers Mayon alert levelPhilippine Star, 13 January 2010
Mayon alert level lowered to 2Philippine Daily Inquirer, 13 January 2010

Information
Global Volcanism Program: Mayon – summary information for Mayon (0703-03=)
Philippine Institute of Volcanology and Seismology – website for Phivolcs

The Volcanism Blog