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SI/USGS Weekly Volcanic Activity Report, 3-9 June 2009 11 June 2009

Posted by admin in activity reports, Alaska, Batu Tara, Chaitén, Chile, Colombia, Dukono, Ecuador, eruptions, Fuego, Galeras, Guatemala, Hawaii, Japan, Kamchatka, Karangetang, Karymsky, Kelut, Kilauea, Llaima, Manam, Mexico, Pacaya, Papua New Guinea, Peru, Popocatépetl, Rabaul, Redoubt, Russia, Sakura-jima, Santa María, Shiveluch, Slamet, Tungurahua, Ubinas, United States, Weekly Volcanic Activity Reports.
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SI/USGS Weekly Volcanic Activity Report 3-9 June 2009

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 3-9 June 2009 is available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.

New activity: Galeras (Colombia), Karangetang (Indonesia), Sangeang Api (Indonesia), Slamet (Indonesia).

Ongoing activity: Batu Tara (Indonesia), Chaitén (Chile), Dukono (Indonesia), Fuego (Guatemala), Karymsky (Russia), Kelut (Indonesia), Kilauea (USA), Llaima (Chile), Manam (Papua New Guinea), Pacaya (Guatemala), Popocatépetl (Mexico), Rabaul (Papua New Guinea), Redoubt (USA), Sakura-jima (Japan), Santa María (Guatemala), Shiveluch (Russia), Tungurahua (Ecuador), Ubinas (Peru).

NEW ACTIVITY

Galeras (Colombia). The volcano erupted on 7 June, producing a NW-drifting ash plume to 6.8 km a.s.l. and ashfall downwind. The eruption was preceded by a magnitude 4 earthquake ~3 km SSE of the crater at a depth of 2 km. On 8 June there was a magnitude 3.9 earthquake 1 km E at a depth of ~2 km, followed by two explosions about 5 minutes apart, audible up to 45 km distant. The first explosion produced an ash plume reported to have reached 10 km a.s.l. and drifted NW, the second and larger a plume that reached 13.7 km a.s.l. and drifted SE.

Karangetang (Indonesia). Over 1-6 June lava flows travelled 50 m E and 600 m SE, with incandescent rocks reaching as far as 2 km distant. On 1 June ‘white-to-grey-to-brownish’ plumes reached 700 m above the main crater and incandescent lava was ejected 500-700 m on 1 June. Tremor amplitude and earthquake numbers decreased on 4 June, and white plumes rose 50-300 m above the main crater 4-6 June.

Sangeang Api (Indonesia). An increase in earthquake activity caused the alert level to be raised on 4 June. Over 1 May to 3 June white plumes rose 5-25 m.

Slamet (Indonesia). There was an overall decrease in Slamet’s activity over 26 May to 4 June, with earthquake numbers and water temperatures around the volcano lower. White plumes rose 100-750 m. Inflation and an increased number of earthquakes were registered 5-7 June, white plumes with ash emissions rose 200-800 m above the crater, and incandescent material was ejected 50-200 m.

ONGOING ACTIVITY

Batu Tara (Indonesia). Ash plumes reportedly rose to 2.4 km a.s.l. and drifted 40-75 km NW, W and SW over 3-8 June. On 9 June an ash plume drifted 140 km W.

Chaitén (Chile). The lava dome complex continued to grow, with gas-and-ash plumes rising 1.5 km above the dome over 27 May to 8 June. Collapses of unstable slopes generated block-and-ash flows. During 5-9 June ash plumes reportedly rose to 1.5-3.7 km a.s.l. and drifted WSW, SE, ENE and NE, and a thermal anomaly was seen on satellite imagery on 7 June.

Dukono (Indonesia). Ash plumes were reported drifting 20-75 km NW and NE during 6-8 June.

Fuego (Guatemala). Explosions, some accompanied by rumbles and shock waves, produced ash plumes that rose to 4.1-4.7 km a.s.l. and drifted 10 km W, SW and S on 5, 8 and 9 June. Avalanches were reported and fumarolic plumes rose 150 m, drifting S and SW.

Karymsky (Russia). An explosion on 6 June was reported to have produced an ash plume to 3.4 km a.s.l.

Kelut (Indonesia). Occasional diffuse white plumes reportedly rose 50-150 m above the crater. The alert level was lowered on 9 June.

Kilauea (USA). Lava continued to flow SE to the Waikupanaha ocean entry, and the Kupapa’u ocean entry was active again from 4 or 5 June. Active surface flows were detected. The Halema’uma’u crater vent continued to produce a mainly white plume that drifted mainly SW. A molten lava pool produced bright incandescence, and lava was clearly visible on webcam views. SO2 emissions remained elevated.

Llaima (Chile). A small active lava outcrop produced incandescence in an area SW of the main crater during 5-8 June, and a small point on the E flank fissure produced incandescence on 6 June. Gas and steam emissions took place from an area W of the main crater.

Manam (Papua New Guinea). An ash plume was reported to have risen to 2.4 km a.s.l. and drifted ~40 km NW on 8 June.

Pacaya (Guatemala). Fumarolic plumes from McKenney cone rose 50-200 m and drifted W and SW. On the lower S flank 2-4 lava flows 150-300 m long were emitted.

Popocatépetl (Mexico). DUring 3-9 June steam and gas emissions were reported, with the plumes containing slight amounts of ash during 8-9 June.

Rabaul (Papua New Guinea). Tavurvur cone produced white and occasionally blue plumes to 1 km above the crater during 29 May to 6 June, and incandescence was visible at night. An ash plume drifted NW and caused ashfall on Rabaul town and surrounding areas on 5 June.

Redoubt (USA). The lava dome continued to grow, and by 9 June the dome extended 950 m down the N flank. During 3-9 June seismicity was low but above background, and small discrete earthquakes and rockfalls were detected in the summit region.

Sakura-jima (Japan). On 7 June an eruption produced a plume to 3 km a.s.l., and on 9 June an eruption produced a plume to 2.4 km a.s.l. that drifted N.

Santa María (Guatemala). Explosions from the Santiaguito lava dome complex on 5, 8 and 9 June produced plumes to 2.8-3.3 km a.s.l. that drifted SW. Gas plumes, sometimes grey, rose 300-600 m above Caliente dome. Avalanches took place on the S and W flanks.

Shiveluch (Russia). Seismic activity was above background levels 29 May to 5 June, and diffuse ash plumes were emitted, a plume on 1 June possibly rising to 3.8 km a.s.l. Steam-and-gas emissions and a daily thermal anomaly over the lava dome were observed. A possible eruption was reported on 7 June, producing a plume to 3.4 km a.s.l.

Tungurahua (Ecuador). Tremor and explosions were detected 3-9 June, a gas-and-ash plume rose to 200m and drifted W and lahars descended multiple drainage channels on 3 June. Ashfall was reported to the SW and W on 4 June, blocks descended the flanks and roars/cannonades were heard on 7-8 June.

Ubinas (Peru). Plumes rose to 6.1-6.7 km a.s.l., and possibly to 7.9 km a.s.l., on 5 June, and drifted to points S and W. On 6 and 9 June plumes rose to 6.1-7.6 km a.s.l. and drifted S and NE respectively.

ACKNOWLEDGEMENTS AND DISCLAIMER

The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 3-9 June 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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