Skip to main content
U.S. flag

An official website of the United States government

Deformation and seismicity near South Sister during 2001-2022

January 2022 (approx.)

Detailed Description

Comparison of vertical GPS motion measured at station HUSB (top) with earthquake depth (bottom). Red line is a 60-day average of the cleaned GPS time series plotted in gray. Earthquakes are plotted with respect to their magnitudes. The swarm in 2004 represents the vast majority of earthquake in the vicinity of the deforming region. Earthquake information is from the Pacific Northwest Seismic Network.


Public Domain.