Volcanos

Roundup of Global Volcanic Activity:

Shiveluch in Kamchatka had an explosion last night at 21:02 UTC lasting for 6.5 minutes that sent an ash plume to an estimated altitude of about 30,000 ft (7-8 km), KVERT reports. The eruption was not observed directly, but inferred from seismic data.

Tolbachik (Kamchatka): No significant changes have occurred in the ongoing eruption. Seismic tremor remains stable and suggests that lava flows continue to erupt from the southern fissure.

Kizimen (Kamchatka): The lava dome remains active and continues to grow slowly. KVERT reports incandescence of the volcano summit, hot avalanches on the western and eastern volcanic flanks, and strong and moderate gas-steam activity, associated with medium levels of seismicity.

Bezymianny (Central Kamchatka Depression): No changes in activity have been reported recently. The volcano remains at Aviation Colour Code YELLOW, because its lava dome is likely still active. KVERT is unable to distinguish seismic data from Bezymianny from the strong signals from erupting Tolbachik.

Gorely (Southern Kamchatka): Strong steaming and hydrothermal activity continue to produce medium levels of seismicity.

Hachijo-jima (Izu Islands): A shallow (10 km) magnitude 4.4 earthquake occurred about 16 km to the NW of the volcano today.

Veniaminof (Alaska Peninsula, USA): AVO reports continuing seismic tremor and the observation of a steam plume from the volcano, but no other activity has been noted.

Pavlov (Alaska Peninsula, USA): Ash emissions, probably caused by strombolian activity continue to be observed. Seismic tremor and explosion signals accompany the activity. Persistent elevated surface temperatures visible on satellite data suggest that there is some lava effusion as well (in the form of small flows or a new lava dome). Satellite images from the last day also show an ash plume extending 12 miles (20 km) southeast of the volcano. This direction is consistent with low-level (less than 20,000 ft asl) winds. (AVO)

Guatemala: Santa María / Santiaguito (Guatemala): A moderate explosion occurred this morning at 05:18 local time, sending an ash plume to 700 m above the crater and drifting SW, where light ash fall occurred in Finca La Florida and Parcelamiento Monte Claro. The southern lava flow on the dome's flank produced some weak avalanches.

Pacaya (Guatemala): Weak explosive activity has apparently resumed, INSIVUMEH reported.

Fuego (Guatemala): Activity remains relatively weak. During the past 24 hours, INSIVUMEH observed 6 small explosions with ash plumes up to 500 m height. At the moment, the main risk from Fuego is posed by lahars (mud flows). Following heavy rainfall, unusually strong lahars with fronts of up to 5 meters tall travelled through the Ceniza ravine on 8 June, damaging the road that connects Siquinala to Rochela, San Andrés Osuna, and Ceilán. Deposits of 2-3 meters were left containing blocks of up to 3 meter in size.

Nevado del Ruiz (Colombia): Strong degassing is visible as a large SO2 plume on satellite data. Seismic recordings show many mostly long-period quakes, typical of internal fluid movements.

Copahue (Chile/Argentina): Seismic and degassing activity have decreased, although SERNAGEOMIN maintains alert level "orange". A total of 120 quakes, mostly near the surface, were counted during 8-9 June. No volcanic tremor was detected. A white steam and gas plume was rising 300 m from the crater.