Archived Updates

Anatahan Volcano Update for August 11
Submitted Tuesday, August 12, 10:45 a.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has been low, at a level similar to that of the past month or so. There were no apparent eruption signals or precursory events. Tremor and seismic energy release are low.

Anatahan Volcano Update for August 12
Submitted Wednesday, August 13, 10:30 a.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has been low, at a level similar to that of the past month or so. There were no apparent eruption signals or precursory events. Tremor and seismic energy release are low.

Anatahan Volcano Update for August 13
Submitted Thursday, August 14, 09:45 a.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has been very low, at a level similar to that of the past month or so. There were no eruption signals or precursory events. Tremor and seismic energy release are low.

Anatahan Volcano Update for August 14
Submitted Friday, August 15, 9:45 a.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has been low, at a level similar to that of the past month or so. There were no apparent eruption signals or precursory events. Tremor and seismic energy release are low.

Anatahan Volcano Update for August 15
Submitted Saturday, August 16, 10:00 a.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has been low, at a level similar to that of the past month or so. There were no apparent eruption signals or precursory events. Tremor and seismic energy release are low.

Anatahan Volcano Update for August 16
Submitted Sunday, August 17, 2:50 p.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has remained low, at a level similar to that of the past month or so. There were no apparent eruption signals or precursory events. Tremor and seismic energy release are low.

A recurring source region for seismicity southwest of Anatahan produced nearly 20 recorded events on the seismic network beginning around 0900 UTC. These events are roughly the same distance from the Sarigan and Saipan stations, with an S-P interval of about 10 seconds. The S-P interval at Anatahan is typically 5 seconds. The largest of these events in the past 24 hours (1536 UTC) was about magnitude 3.

Anatahan Volcano Update for August 17
Submitted Monday, August 18, 10:00 a.m. local Anatahan time

For the past 24 hours, Anatahan volcanic seismicity has remained low, at a level similar to that of the past month or so. There were no apparent eruption signals or precursory events. Tremor and seismic energy release are low.