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SI/USGS Weekly Volcanic Activity Report, 8 April 2009 – 14 April 2009 16 April 2009

Posted by admin in activity reports, Alaska, Arenal, Batu Tara, Caribbean, Chaitén, Chile, Colima, Costa Rica, Dukono, Ebeko, Ecuador, eruptions, Fernandina, Galapagos, Hawaii, Indonesia, Japan, Karymsky, Kilauea, Kliuchevskoi, Koryaksky, Llaima, Mexico, Papua New Guinea, Rabaul, Redoubt, Russia, Sakura-jima, Shiveluch, Soufrière Hills, Suwanose-jima, Tungurahua, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 8 April 2009 - 14 April 2009

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 8 April 2009 to 14 April 2009 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity: Ebeko (Paramushir Island), Fernandina (Galapagos Islands, Ecuador), Kliuchevskoi (Kamchatka, Russia), Llaima (Chile), Miyake-jima (Japan), Redoubt (Alaska, USA), Sakura-jima (Japan).

Ongoing activity: Arenal (Costa Rica), Batu Tara (Komba Island, Indonesia), Chaitén (Chile), Colima (Mexico), Dukono (Halmahera, Indonesia), Karymsky (Kamchatka, Russia), Kilauea (Hawaii, USA), Koryaksky (Kamchatka, Russia), Rabaul (Papua New Guinea), Shiveluch (Kamchatka, Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Tungurahua (Ecuador).

NEW ACTIVITY

Ebeko (Paramushir Island): 3-10 Apr 09, gas-and-steam plumes with some ash content to 3.4 km a.s.l., drifted 8 km southerly; 5 Apr 09, light ashfall reported in Severo-Kurilsk (7 km E); 12 Apr 09, ash plume drifted 6 km SE at 1.5 km a.s.l.

Fernandina (Galapagos Islands, Ecuador): 10 Apr 09: eruption began between 2200 on 10 Apr 09 and 0030 on 11 Apr 09; an overflight by Galapagos National Park personnel indicated a fissure eruption from the SW flank of the volcano, about 500 m from the summit crater, fissure was 200 x 10 metres and ejected lava fountains 15 m high; gas-and-ash plume drifted SW; 11-14 Apr 09, gas plumes possibly with some ash drifted up to 370 km W, SW, S, and N; 14 Apr 09, large thermal anomaly and sulphur dioxide detected.

Kliuchevskoi (Kamchatka, Russia): 3-10 Apr 09, fumarolic activity observed; 5 & 6 Apr 09, thermal anomaly detected; 5-8 Apr 09, weak volcanic tremor detected; 9 Apr 09, possible eruption produced plume to 4.9 km a.s.l., drifted NE; 11 Apr 09, another possible eruption detected.

Llaima (Chile): 6 Apr 09, rapid decline in activity; 7 Apr 09, weak emissions of gas and ash observed, overflight reported main crater completely blocked by a large pyroclastic cone with four inactive craters, sulphur dioxide and hydrochloric gas emissions, two lava flows descended W flank and one descended NE flank, all causing lahars; 7-10 Apr 09, intermittent incandescence from lava flow at SW base of pyroclastic cone observed, incandescent blocks descended W; 8 Apr 09, gas plume drifted NE; 9-10 & 13-14 Apr 09, gas and steam plumes rose from pyroclastic cone; 14 Apr 09, fumarolic activity from pyroclastic cone observed.

Miyake-jima (Japan): 1 Apr 09, eruption produced ash plume to 600 m above the crater, drifted E.

Redoubt (Alaska, USA): 8-14 Apr 09, lava dome continued to grow, reported as circular in shape, 400 m in diameter, in same location as previous lava dome; continuous sulphur dioxide plume seen on satellite imagery; smaller steam plumes with possible ash content observed.

Sakura-jima (Japan): 8 Apr 09, eruption produced plume to 2.7 km a.s.l.; 9 Apr 09, Vulcanian explosion ejected bombs up to 1.3 km distance, plume rose to 4.8 km a.s.l., drifted SW, pyroclastic flow traveled 1 km E, heavy ashfall reported in Kagoshima City (~10 km W); 10 Apr 09, eruptions
produced plumes to 2.1-2.7 km a.s.l., drifted W and S.

ONGOING ACTIVITY

Arenal (Costa Rica): during Mar 09 gas emissions, sporadic strombolian eruptions and occasional avalanches down SW flanks from Crater C; acid rain and small amounts of ejected pyroclastic material affected NE and SE flanks.

Batu Tara (Komba Island, Indonesia): 11-12 & 14 Apr 09, ash plumes to 1.8-2.4 km a.s.l., drifted 35-90 km W and NW.

Chaitén (Chile): 30 Mar – 6 Apr 09, collapses from central spine continued, and new smaller spine grew on the southern area of Dome 1; 8 Apr 09, seismic activity gradually increased; 11-12 Apr 09, numbers and magnitudes of earthquakes reached highest levels; during 9-11 & 14 Apr 09, ash plumes rose to 1.5-2.4 km a.s.l., drifted NE, ENE, and ESE.

Colima (Mexico): 8-10 & 12-13 Apr 09, white and gray plumes to 3.9-5.2 km a.s.l., occasionally
drifted E, S, SW, and W.

Dukono (Halmahera, Indonesia): 12 Apr 09, ash plume to 3 km a.s.l., drifted 55 km NW.

Karymsky (Kamchatka, Russia): 2 & 3 Apr 09, seismicity above background levels; 4 Apr 09, seismicity at background levels; 5 Apr 09, weak thermal anomaly detected; 9 Apr 09, fumarolic activity observed.

Kilauea (Hawaii, USA): 8-14 Apr 09, lava flowed SE through lava tube system to Waikupanaha and Kupapa’u ocean entries, occasional explosions at the Waikupanaha entry, surface flows detected, incandescence intermittently seen from Halema’uma’u vent, which produced white plume occasionally tinged brown, drifted mainly SW.

Koryaksky (Kamchatka, Russia): 7 & 8 Apr 09, seismicity elevated, at background levels on the other days 3-10 Apr 09; 7 Apr 09, weak volcanic tremor detected; during reporting period gas plumes
containing a small amount of ash rose to 5.4 km a.s.l., drifted NE, NW, SE, and SW; 11 Apr 09, ashfall reported in Petropavlovsk-Kamchatsky (30 km S).

Rabaul (Papua New Guinea): 3-9 Apr 09, white and grey plumes from Tavurvur cone rose 1 km above the crater, drifted SE and NW; occasion incandescence seen at night, light ashfall reported in Kokopo, ~20 km SE; 11-12 Apr 09, ash plumes rose to 2.4 km a.s.l., drifted up to 75 km NW; 14 Apr 09, ash plumes to 3 km a.s.l., drifted W and up to 120 km NW.

Shiveluch (Kamchatka, Russia): 3-10 Apr 09, seismic activity above background levels; 3-5 and 8-9 Apr 09, ash plumes likely rose to 7.5 km a.s.l.; 3-7 & 9 Apr 09, fumaroles active; daily thermal anomaly detected on the lava dome.

Soufrière Hills (Montserrat): 3-10 Apr 09, activity at a low level; heavy rainfall during 8-9 Apr 09, caused multiple lahars.

Suwanose-jima (Japan): 8 & 10 Apr 09, explosions reported.

Tungurahua (Ecuador): 9 Apr 09, steam plume rose 300 m above crater, drifted SW; 10 Apr 09, light ashfall reported to the SW; 11 Apr 09, lahar traveled SW down Mapayacu drainage; 14 Apr 09, steam-and-gas plume with some ash content to 7.5 km a.s.l., drifted N.

ACKNOWLEDGEMENTS AND DISCLAIMER

The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 8 April to 14 April 2009. It is provided for information only, and is based on but not a substitute for the full report, which comes with its own criteria and disclaimers. The map base is derived from the Smithsonian Institution/USGS/US Naval Research Laboratory This Dynamic Planet website.

For all our coverage of the SI/USGS Weekly Volcanic Activity Reports: Weekly Volcanic Activity Reports « The Volcanism Blog.

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