Alaska Volcano Observatory

Located earthquakes near Mount Spurr, Alaska, April through October 8, 2024. Earthquake locations are colored by depth, with shallow earthquakes appearing red and deeper earthquakes are blue. Larger dots indicate higher magnitude earthquakes; the largest earthquake on this figure is a M2.3. Triangles indicate the locations of AVO's monitoring sites, colored by equipment at the specific site. Black triangle denote a location of a seismometer, and yellow triangles mark sites with co-located seismometers and GNSS. GNSS stands for Global Navigation Satellite System receiving sites that use signals from the Global Positioning System and other satellite constellations to precisely measure the position on the Earth in three dimensions (north-south, east-west, and vertical).

Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
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