|Start:||February 2001 ||Observed|
|Stop:||September 2001 ||Observed|
|Seismicity with no confirmed eruption: ||
|Eruption Type:||Not an eruption.|
McGimsey and others (2004) report anomalous seismicity at Great Sitkin during 2001: "Beginning in early February, 2001, seismicity at Great Sitkin volcano began to increase. The activity came to an abrupt end by the end of the month. The next seven months was characterized by short-lived seismic swarms that ended as quickly as they began, most only a day or two in duration. The largest swarm (15 events) occurred on Saturday, August 18, 2001."