By Garland Kennedy
Sitka Sentinel 

Small quakes at Mount Edgecumbe likely due to magma movement


While earthquake activity around Mount Edgecumbe has declined following a series of small quakes last month, further investigation by the Alaska Volcano Observatory shows that the area around the mountain has been steadily deforming since 2018, likely due to the movement of magma.

The observatory said in an online post: “The recent (earthquake) swarm inspired an in-depth analysis of the last 7.5 years of ground deformation detectable with radar satellite data.” That analysis revealed a broad area, almost 11 miles in diameter, “of surface uplift” just east of Mount Edgecumbe.


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