M2.1 Earthquake 4 km SW of Wilderness Rim, Washington — September 16, 2026
2026-09-16 08:40:44 UTC (2026-09-16) · approx. 12:40 AM UTC-8 local
On September 16, 2026 at 08:40 UTC, a magnitude 2.1 shallow crustal earthquake struck 4 km SW of Wilderness Rim, Washington, at a depth of 20.8 km and coordinates 47.4172°, -121.8057°.
Physical scale: An earthquake of magnitude 2.1 releases seismic energy equivalent to roughly 23.6 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 18 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 2 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-121.8057°E
Technical Information
Common Questions
How strong was the magnitude 2.1 earthquake near Wilderness Rim, Washington?
The magnitude 2.1 earthquake that struck 4 km SW of Wilderness Rim, Washington on September 16, 2026 at 08:40 UTC had a depth of 20.8 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 2.1 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: uw714103411). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 16, 2026). M2.1 Earthquake 4 km SW of Wilderness Rim, Washington — September 16, 2026. Retrieved September 16, 2026 from https://www.earthquaketracker.org/earthquakes/event/uw714103411/