The Alaska Volcano Observatory maintains a database
of volcano earthquakes located since October 1989. For detailed information about seismic
network coverage through time, please consult the AVO volcano
earthquake catalogs. Recent seismic activity can be viewed on the recent earthquakes page. Because these
events are reviewed by a seismologist, there can be a delay of a few days. In rare cases,
large earthquake swarms may take weeks to fully process. Users are encouraged to contact
AVO directly if this data will form the basis of extended research.
Search results can be downloaded in a number of formats, some including
phase arrival times. Request size is limited to several thousand earthquakes
per search. When arrivals are included, searches are limited to 500
earthquakes. Note that requests for large numbers of events may take several
minutes, particularly when phase arrivals are included.