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SI/USGS Weekly Volcanic Activity Report, 13-19 October 2010 23 October 2010

Posted by admin in activity reports, Caribbean, Chile, Ecuador, eruptions, Gorely, Hawaii, Indian Ocean, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Piton de la Fournaise, Planchón-Peteroa, Russia, Sakura-jima, Sangay, Shiveluch, Soufrière Hills, Suwanose-jima, United States, Villarrica, Weekly Volcanic Activity Reports.
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The Weekly Volcanic Activity Report for 13-19 October 2010 is compiled by Sally Kuhn Kennert and published by the Global Volcanism Program. Some selected highlights:

  • Piton de la Fournaise: eruption began on 14 October
  • Gorely: seismic restlessness at this Kamchatka volcano
  • Shiveluch: elevated seismic activity, gas, steam and ash plumes

SI/USGS Weekly Volcanic Activity Report 13-19 October 2010

Click on the map for a larger version (1280 x 898 pixels).

The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 13-19 October 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: Piton de la Fournaise (Réunion Island).

Ongoing activity: Gorely (Russia), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Planchón-Peteroa (Chile), Sakura-jima (Japan), Sangay (Ecuador), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan), Villarrica (Chile).

Piton de la Fournaise (Réunion Island). OVPDLF reported that an eruption from Piton de la Fournaise began on 14 October near the Château Fort crater, about 1.5 km SE of the Dolomieu crater rim, after a seismic crisis was detected a few hours before. Lava fountaining occurred from four vents along a fissure. The Alert level was raised to 2 (“eruption in progress in the Fouqué caldera”). By 16 October, lava had traveled 1.6 km ESE, and was confined inside the Fouqué caldera. Lava fountains were 10 m high during 16-17 October and rose from two vents. On 17 October only one vent fed the lava flow. Scientists noted a reduction in tremor, a decrease in the rate of the lava flow, and less intense explosive activity and degassing. On 18 October lava was again ejected from two vents. The next day a hornito formed in the second vent and lava was ejected 5-15 m above a third vent. [GVP: Piton de la Fournaise]

ONGOING ACTIVITY

Gorely (Russia). KVERT reported that during 8-15 October seismic activity from Gorely was above background levels and volcanic tremor continued to be detected. A thermal anomaly on the volcano was seen in satellite imagery on 10 and 13 October. Gas-and-steam activity was noted during 10 and 13-15 October. The Aviation Colour Code level remained at Yellow. [GVP: Gorely]

Karymsky (Russia). KVERT reported that seismic activity from Karymsky was above background levels during 8-15 October, suggesting that possible ash plumes rose to altitudes of 2-3 km (6,600-9,800 ft) a.s.l. Volcanologists working at Karymsky observed Strombolian activity at night, along with ash plumes during 7-10 October that rose to an altitude of 2.5 km (11,500 ft) a.s.l. and drifted E. Satellite imagery showed ash plumes that drifted 35 km SE on 7 and 8 October and thermal anomalies on the volcano during 7-10, 12, and 14 October. Based on information from the Yelizovo Airport (UHPP), the Tokyo VAAC reported that on 16 October an ash plume rose to an altitude of km (9,000 ft) a.s.l. and drifted SE. The Aviation Colour Code level remained at Orange. [GVP: Karymsky]

Kilauea (Alaska, USA). During 13-19 October, HVO reported that activity at Kilauea continued from the summit caldera and the east rift zone. At the summit caldera, the level of the lava-pool surface in the deep pit within Halema’uma’u crater remained mostly stable between 155 and 160 m below the crater floor; periodically the lava rose 15-20 m above that level. Glow from the vent was also visible at night. A plume from the vent drifted mainly SW. At the east rift zone, lava that flowed through the TEB lava-tube system fed small lava flows and at least one ocean entry at the Puhi-o-Kalaikini delta. A break-out lava flow began just west of the end of Highway 130 on 15 October. During 15-19 October the lava filled in low areas between the highway and the inactive flows that had stopped near Kalapana Gardens earlier in the year. A vent on the N part of the Pu’u ‘O’o crater floor effused lava during 12-14 October and was incandescent during 15-19 October. [GVP: Kilauea]

Kliuchevskoi (Russia). KVERT reported that during 8-15 October seismic activity from Kliuchevskoi was above background levels and lava from the summit crater flowed down the SW and W flanks. Satellite imagery analyses showed a large and intense daily thermal anomaly over the volcano. Strombolian activity was observed during 7-11 October. Daily gas-and-steam plumes rose to an altitude of 5.8 km (19,000 ft) a.s.l., but on 11 October the plumes rose to an altitude of 7.8 km (25,600 ft) a.s.l. Ash plumes seen in satellite imagery drifted 90 km NE and E during 10 and 12-14 October. The Tokyo VAAC reported that ash was seen in satellite imagery on 16 October. The next day possible eruptions reported by KVERT, and seen in satellite imagery, produced plumes that rose to altitudes of 5.2-5.8 km (17,000-19,000 ft) a.s.l. and drifted SE. Ash seen in imagery on 18 October may have been from an eruption earlier that day. Ash again seen in satellite imagery from a possible eruption on 19 October rose to an altitude of 6.1 km (20,000 ft) a.s.l. and drifted N. The Aviation Colour Code level remained at Orange. [GVP: Kliuchevskoi]

Planchón-Peteroa (Chile). Based on SIGMET notices, the Buenos Aires VAAC reported that on 12 October an ash plume from Planchón-Peteroa drifted E at an altitude of 4.6 km (15,000 ft) a.s.l. [GVP: Planchón-Peteroa]

Sakura-jima (Japan). Based on information from JMA, the Tokyo VAAC reported that explosions from Sakura-jima during 13-16 October produced plumes that rose to altitudes of 1.5-2.1 km (6,000-7,000 ft) a.s.l. and drifted NE, E, SE, and S. During 15-16 October pilots reported that ash plumes rose to altitudes of 1.5-1.8 km (5,000-6,000 ft) a.s.l. and drifted E and S. [GVP: Sakura-jima]

Sangay (Ecuador). The Washington VAAC reported that on 14 October a pilot noted an ash plume from Sangay; however, an analysis of satellite imagery revealed only gas plumes drifting NW. [GVP: Sangay]

Shiveluch (Russia). KVERT reported that during 8-15 October seismic activity from Shiveluch was above background levels, suggesting that possible ash plumes rose to altitudes of 5.2-6 km (17,100-19,700 ft) a.s.l. Gas-and-steam plumes sometimes containing ash were periodically observed. Satellite imagery analyses showed a daily thermal anomaly on the volcano and ash plumes that drifted 130 km SE during 9-10 October. Based on analyses of satellite imagery, the Tokyo VAAC reported a possible eruption on 16 October. Subsequent notices stated that ash was present, but had dissipated. The Aviation Colour Code level remained at Orange. [GVP: Shiveluch]

Soufrière Hills (Montserrat). MVO reported that during 8-15 October activity from the Soufrière Hills lava dome was at a low level. Light ashfall generated by rockfalls and pyroclastic flows occurred in inhabited areas of Montserrat mainly during 8-10 October. A pyroclastic flow originating from an unstable area on the W side of the lava dome traveled 2 km on 9 October. The Hazard Level remained at 3. [GVP: Soufrière Hills]

Suwanose-jima (Japan). Based on information from JMA, the Tokyo VAAC reported explosions from Suwanose-jima during 16-17 October. A plume rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted SE on 17 October. [GVP: Suwanose-jima]

Villarrica (Chile) According to the Projecto Observación Visual Volcán Villarrica (POVI), a small ash cloud was observed rising from Villarrica on 10 October and again on 16 October. [GVP: Villarrica]

The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 13-19 October 2010. 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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