M3.8 Earthquake 207 km W of Port McNeill, Canada — August 7, 2021
2021-08-07 20:13:54 UTC (2021-08-07) · approx. 11:13 AM UTC-9 local
On August 7, 2021 at 20:13 UTC, a magnitude 3.8 shallow crustal earthquake struck 207 km W of Port McNeill, Canada, at a depth of 4.6 km and coordinates 50.6505°, -130.0153°.
Physical scale: An earthquake of magnitude 3.8 releases seismic energy equivalent to roughly 7.6 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 252 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-130.0153°E
Technical Information
Common Questions
How strong was the magnitude 3.8 earthquake near Port McNeill, Canada?
The magnitude 3.8 earthquake that struck 207 km W of Port McNeill, Canada on August 7, 2021 at 20:13 UTC had a depth of 4.6 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 3.8 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.8 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000f388). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 7, 2021). M3.8 Earthquake 207 km W of Port McNeill, Canada — August 7, 2021. Retrieved October 23, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f388/