Volcanos

Roundup of Global Volcanic Activity:

Tolbachik (Kamchatka): The eruption continues with well-fed lava flows from the southern fissure. Tremor has decreased a bit compared to yesterday, but remains strong, KVERT reports. None of the other volcanoes in Kamchatka has showed significant changes in activity.

Sakurajima (Kyushu, Japan): After a phase of several relatively strong explosions with ash plumes often reaching 10,000 ft (3 km) during 31 Jan - 2 Feb, the volcano seems to have taken a short rest, with only two small eruptions recorded during the past 48 hours.

Tavurvur (Papua New Guinea): More ash emissions and explosions have occurred during the past days.

Batu Tara (Indonesia) is back more often on this list: A moderately strong explosion this morning produced an ash plume rising to 7,000 ft (2.1 km) which drifted 60 nautical miles to the west.

White Island (New Zealand): Unchanged strong continuous tremor but with a bit less earthquakes than yesterday accompany strong degassing.

In Mexico, Colima volcano continues with small explosions, rockfalls and volcanic tremor. Popocatépetl has slowed down its rate of emissions to only 1 per 2 hours during yesterday, but there is still glow at the summit and an important (but decreased compared to last week) gas (SO2) plume emitted. A shallow magnitude 3.2 earthquake occurred yesterday under the western flank.

San Cristobal (Nicaragua): A shallow magnitude 2.7 earthquake occurred this morning about 20 km NW of the volcano. Pulses of tremor and numerous aftershocks are visible on the current seismogram. There are no reports about other unusual activity at the volcano. Masaya (Nicaragua): Tremor has eased a bit today and is close to background levels.

San Miguel (El Salvador): Tremor has remained at unchanged, weak levels today.

Reventador (Ecuador): Seismic activity with continuous strong tremor continues, but cloud cover prevented direct observations of the ongoing activity (likely lava dome grown with lava flow extrusion as well as ash emissions).

Tungurahua (Ecuador): The volcano's seismic activity remains stable, but elevated with the occurrence of numerous long period events related to fluid movement within the edifice. Bad weather prevented direct observation of surface activity.

Copahue (Chile/Argentina): Activity has increased again. Sernageomin reported 92 seismic events during 2-3 Jan and the occurrence of a seismic swarm on the evening of 2 Jan. A degassing plume was observed rising up to 1350 m, whose intensity was without apparent correlation to seismicity.

Ambrym (Vanuatu): A prominent SO2 plume emanating from Ambrym is visible on today's NOAA satellite data image.