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.