Pacific Northwest Seismic Network

2009 Mount Rainier Swarm

Status: Inactive
Events121Latest2009/09/22Earliest2009/09/20Largest2.5Smallest-0.5

Group Parameters

Type
Volcanic
Start
2009/09/20 07:00:00 AM UTC
End
2009/09/23 06:59:00 AM UTC
Volcano
Mount Rainier
Center
46.853, -121.76
Radius
6.21 mi

Summary

Swarm of small earthquakes under Mount Rainier in 2009.

Map

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Details

Until 2025, this flurry of small events at Mount Rainier had the largest number of events detected by PNSN at Mt. Rainier in a short amount of time. This episode was studied in detail, see the reference below, and attributed to the movement of hydrothermal fluids within the volcano.

Reference