There has been in an increase in the number of located earthquakes beneath a broad swath of volcanoes in the Katmai region beginning in August 2022. Background seismicity in this area, which includes Mount Katmai, Trident Volcano, Mount Mageik, and Mount Martin, is usually less than 30 located earthquakes per week, although there is considerable variation. An earthquake swarm occurred beneath Trident Volcano from August to October 2022, marking the approximate start of this ongoing period of elevated earthquake activity.
While earthquake activity has been more dispersed across the Katmai region since October, it has remained relatively high. Over the past month it has increased to more than 80 located earthquakes per week. This earthquake activity could be the result of magma movement but there is no indication that an eruption is imminent, or that one will occur. Seismic swarms like this are relatively common at volcanoes and most do not lead to an eruption. There have been no other signs of unrest noted in monitoring data from the region since last August. AVO will issue additional notices of activity should the earthquakes continue or increase.
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