Earthquakes near Mount St. Helens, Washington
Geological Society of America Bulletin
By: J. D. Unger and Kay F. Mills
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Abstract
Seismic monitoring around Mount St. Helens, Washington, for 28 days during the summer of 1970 showed that the frequency of local earthquakes was from 3 to 13 per day and very similar to the activity previously observed near Mount Rainier, Washington. The epicenters of the well-recorded earthquakes form a roughly linear pattern trending northeast from the summit area. This is the only obvious trend in the epicenter distribution. Recent geological investigations have not revealed faults or other major geological discontinuities along this trend. This pattern of epicenters seems to be approximately aligned with the remnants of five ancestral St. Helens plug domes that trend southwest from the summit region.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Earthquakes near Mount St. Helens, Washington |
| Series title | Geological Society of America Bulletin |
| DOI | 10.1130/0016-7606(1973)84<1065:ENMSHW>2.0.CO;2 |
| Volume | 84 |
| Issue | 3 |
| Year Published | 1973 |
| Language | English |
| Publisher | Geological Society of America |
| Description | 3 p. |
| First page | 1065 |
| Last page | 1067 |
| Country | United States |
| State | Washington |
| Other Geospatial | Mount St. Helens |
| Google Analytic Metrics | Metrics page |