SI/USGS Weekly Volcanic Activity Report, 29 September – 5 October 2010 7 October 2010Posted by admin in activity reports, Bagana, Batu Tara, Caribbean, Chile, Colombia, Dukono, Ecuador, eruptions, Fuego, Guatemala, Hawaii, Indonesia, Japan, Kamchatka, Karymsky, Kilauea, Kliuchevskoi, Mexico, Nevado del Huila, Nevado del Ruiz, Pacaya, Papua New Guinea, Piton de la Fournaise, Planchón-Peteroa, Popocatépetl, Reventador, Russia, Sakura-jima, Sarychev Peak, Shiveluch, Soufrière Hills, Suwanose-jima, United States, Weekly Volcanic Activity Reports.
The Weekly Volcanic Activity Report for 29 September to 5 October 2010 is compiled by Sally Kuhn Kennert and published by the Global Volcanism Program. Some selected highlights:
- Nevado del Huila: ash emissions reported at an altitude of 7.6 km
- Nevado del Ruiz: increased seismicity, deformation and geochemical changes causing concern
- Kilauea: a new breakout lava flow causes fires
- Sarychev Peak: a diffuse ash plume reported
Click on the map for a larger version (1280 x 898 pixels).
The Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report for 29 September – 5 October 2010 is now available on the Global Volcanism Program website. The following is a summary and not a substitute for the full report.
- The current report: Weekly Volcanic Activity Report.
- Previous reports: Weekly Reports Archive.
- The SI/USGS map of volcanoes discussed this week.
New activity/unrest: Nevado del Huila (Colombia), Nevado del Ruiz (Colombia), Piton de la Fournaise (Réunion Island), Planchón-Peteroa (Chile), Reventador (Ecuador).
Ongoing activity: Bagana (Papua New Guinea), Batu Tara (Indonesia), Dukono (Indonesia), Fuego (Guatemala), Karymsky (Russia), Kilauea (Hawaii, USA), Kliuchevskoi (Russia), Pacaya (Guatemala), Popocatépetl (Mexico), Sakura-jima (Japan), Sarychev Peak (Russia), Shiveluch (Russia), Soufrière Hills (Montserrat), Suwanose-jima (Japan).
Nevado del Huila (Colombia). The Popayán Volcano Observatory (INGEOMINAS) reported that during 29 September-5 October gas plumes from Nevado del Huila, observed with the Tafxnú and Maravillas web cameras, rose 2.5 km above the summit. Incandescence from the extruding lava dome and collapsing material was also noted. Based on a SIGMET issued from the Bogota MWO, the Washington VAAC reported that on 1 October an ash plume rose to an altitude of 7.6 km (25,000 ft) a.s.l. Later that day, a 10-km-wide gas-and-ash plume was seen in satellite imagery drifting about 30 km S. The Alert Level remained at II (Orange; “probable eruption in term of days or weeks”). [GVP: Nevado del Huila]
Nevado del Ruiz (Colombia). INGEOMINAS reported a gradual increase in seismicity from Nevado del Ruiz on 30 September. Earthquakes were located beneath the Arenas crater at depths of 0.5-2 km. The largest earthquake was M 1.9. A plume of white gas rose 700 m above the caldera and a sulfur odor around the volcano was reported. The Alert Level was raised to III (Yellow; “changes in the behavior of volcanic activity”) on 1 October. The report also noted changes in deformation and geochemistry during the previous few months. Seismic levels fluctuated during 2-3 October. [GVP: Nevado del Ruiz]
Piton de la Fournaise (Réunion Island). OVPDLF reported that on 29 September seismicity from Piton de la Fournaise remained high. Earthquakes were located at the base of the volcano, and inflation was noted particularly in the E. A significant number of landslides were detected in the crater. The Alert level remained at 1 (“probable or imminent eruption”). [GVP: Piton de la Fournaise]
Planchón-Peteroa (Chile). Based on analyses of satellite imagery, pilot observations, and SIGMET notices, the Buenos Aires VAAC reported that during 30 September-3 October ash plumes from Planchón-Peteroa rose to altitudes of 3-6.1 km (10,000-20,000 ft) a.s.l. and drifted NW, NNE, E, and SE. [GVP: Planchón-Peteroa]
Reventador (Ecuador). According to the Washington VAAC, the IG reported ash over Reventador on 30 September. The VAAC stated that a diffuse plume was observed in satellite imagery drifting NW, although ash was not identified. [GVP: Reventador]
Bagana (Papua New Guinea). Based on analyses of satellite imagery, the Darwin VAAC reported that on 1 October an ash plume from Bagana rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 75 km NW. [GVP: Bagana]
Batu Tara (Indonesia). Based on analyses of satellite imagery, the Darwin VAAC reported that during 29 September-5 October ash plumes from Batu Tara rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted 35-95 km W and NW. [GVP: Batu Tara]
Dukono (Indonesia). Based on analyses of satellite imagery, the Darwin VAAC reported that during 1-4 October ash plumes from Dukono rose to an altitude of 2.4 km (8,000 ft) a.s.l. and drifted 55-205 km W and NW. [GVP: Dukono]
Fuego (Guatemala). INSIVUMEH reported that on 2 October a seismic station near Fuego recorded some explosions and a possible lahar that traveled SE. Weather prevented visual observations. During 4-5 October, explosions ejected incandescent material above the crater and produced ash plumes that rose 500-700 m above the crater. [GVP: Fuego]
Karymsky (Russia). KVERT reported that seismic activity from Karymsky was at background levels during 22-24 September and above background levels during 25-29 September. The elevated seismicity suggested that ash explosions had occurred. Ash plumes rose to altitudes of 3-4.5 km (9,800-14,800 ft) a.s.l. during 25-27 September. Thermal anomalies were seen in satellite imagery on 23, 25, and 28 September, and ash plumes drifted 83 km SE on 28 September. The Aviation Colour Code level remained at Orange. [GVP: Karymsky]
Kilauea (Hawaii, USA). During 29 September-5 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 at about 150 m below the crater floor; periodically the lava rose 15-35 m above that level. Glow from the vent was also visible at night. A plume from the vent drifted mainly SW and deposited ash nearby. At the east rift zone, lava that flowed through the TEB lava-tube system mainly fed the Puhi-o-Kalaikini ocean entry. A lava flow that broke out of the lava-tube system W of the end of Highway 130 on 26 September produced a flow E toward Kalapana Gardens that stalled on 28 September. Two days later a new breakout lava flow began near the end of Highway 130, just west of Kalapana Gardens subdivision. The flow sparked fires in a small, sparsely forested kipuka, and remained active through 4 October. During 29 September-4 October, incandescence was visible from a skylight on the lava tube downslope from the rootless shield complex. A large skylight on top of a rootless shield, built over the TEB lava tube mid-way between the top of the pali and the TEB vent, also showed incandescence. On 29 September, lava began to erupt from a vent on the NW edge of Pu’u ‘O’o crater and flowed E across the floor. The lava flow in Pu’u ‘O’o crater continued to be active through the reporting period. [GVP: Kilauea]
Kliuchevskoi (Russia). KVERT reported that during 24 September-1 October seismic activity from Kliuchevskoi was above background levels and lava from the summit crater flowed down the SW flank. Satellite imagery analyses showed a large and intense daily thermal anomaly over the volcano. Ash plumes were seen rising to altitudes of 6.5-7 km (21,300-23,000 ft) a.s.l. on 22 and 24 September, and Strombolian activity was observed during 23, 25, and 28-29 September. Ash plumes seen in satellite imagery drifted 185 km E on 22 and 28 September and 78 km W on 24 and 25 September. KVERT noted that eruptive activity from Kliuchevskoi had been continuous since 1 September 2009. The Aviation Colour Code level remained at Orange. [GVP: Kliuchevskoi]
Pacaya (Guatemala). INSIVUMEH reported that during 2 and 4-5 October steam-and-gas plumes rose from Pacaya’s MacKenney cone and drifted S. [GVP: Pacaya]
Popocatépetl (Mexico). CENAPRED reported that during 30 September-4 October steam-and-gas emissions from Popocatépetl occasionally contained small amounts of ash. [GVP: Popocatépetl]
Sakura-jima (Japan). Based on a pilot observation, the Tokyo VAAC reported that on 1 October an ash plume from Sakura-jima rose to an altitude of 1.8 km (6,000 ft) a.s.l. [GVP: Sakura-jima]
Sarychev Peak (Russia). SVERT reported that a diffuse ash plume from Sarychev Peak was detected by satellite on 20 September. Sarychev Peak does not have a seismic network; satellite image observations are the primary tool for monitoring many of the Kurile Islands volcanoes. [GVP: Sarychev Peak]
Shiveluch (Russia). KVERT reported that during 24 September-1 October seismic activity from Shiveluch was above background levels and suggested that possible ash plumes rose from the volcano. Gas-and-steam plumes were observed during 23, 25, and 28-29 September. Satellite imagery analyses showed a daily thermal anomaly on the volcano and gas-and-steam plumes that drifted 70 km SE on 29 September. Based on analyses of satellite imagery, the Tokyo VAAC reported a possible eruption on 3 October; a subsequent notice stated that ash had dissipated. The Aviation Colour Code level remained at Orange. [GVP: Shiveluch]
Soufrière Hills (Montserrat). MVO reported that during 24 September-1 October activity from the Soufrière Hills lava dome was at a low level. Several pyroclastic flows originating from the W side of the lava dome moved W down Gages Valley and into Spring Ghaut. The largest pyroclastic flow traveled approximately 2 km. 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 3-5 October. A plume drifted E on 5 October. [GVP: Suwanose-jima]
The foregoing is a summary of the Smithsonian Institution/United States Geological Survey Weekly Volcanic Activity Report covering 29 September – 5 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.