Winthrop, WA – A seismic event with a magnitude of 2.7 was detected early Friday morning, approximately 15 kilometers east of Winthrop, Washington. The U.S. Geological Survey (USGS) classified the event, which occurred at 9:12 a.m. UTC, as an “other event” rather than a typical earthquake, leaving the cause open to interpretation.
“Other events” can arise from various sources, both natural and human-made. Potential explanations include mining explosions or quarry blasts, which generate seismic activity resembling small earthquakes. Another possibility is volcanic activity, where magma movement beneath the Earth’s surface triggers tremors not classified as earthquakes. Tectonic tremors, typically low-energy and deep within fault zones, are another potential cause. Glacier Peak is the nearest active volcano in the Cascade Range.
Human-induced seismicity, such as geothermal energy production, wastewater injection, or hydraulic fracturing (fracking), could also be responsible for this event. According to the USGS, these activities have been known to cause seismic events, particularly in regions with industrial operations.
At present, no damage or injuries have been reported. Local authorities and geologists are closely monitoring the situation, seeking to determine the true cause of the event. Residents are encouraged to submit any experiences through the USGS “Felt Report” to help gather more data.
No aftershocks have been reported, but residents are advised to remain aware.
