AVO uses several different types of data to monitor volcanoes for signs of unrest or eruptive activity. The data displayed here have not been reviewed in any way, and are preliminary unless reviewed by an AVO geoscientist.
0000 UTC= 4:00 PM AKST on the previous day as UTC 0600 UTC = 10:00 PM AKST on the previous day as UTC
1200 UTC= 4:00 AM AKST on the same day as UTC 1800 UTC = 10:00 AM AKST on the same day as UTC
RED LINES indicate either a calibration pulse, or where the signal was clipped
(too large to be recorded on the scale of the webicorder).
Great Sitkin 24 hour webicorder
Seismic station GSTD is 1.6 miles (2.5 km) from the summit of Great Sitkin Volcano. There is a problem with the power at the telemetry hub in Adak since March 2, 2010. Image last updated: March 07 2014 23:05:50