M3.4 Earthquake 105 km ENE of Chignik, Alaska — June 5, 2021
2021-06-05 22:10:47 UTC (2021-06-05) · approx. 12:10 PM UTC-10 local
On June 5, 2021 at 22:10 UTC, a magnitude 3.4 intermediate depth earthquake struck 105 km ENE of Chignik, Alaska, at a depth of 81.8 km and coordinates 56.4926°, -156.7269°.
Physical scale: An earthquake of magnitude 3.4 releases seismic energy equivalent to roughly 1.9 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 134 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 1 citizen response 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
-156.7269°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.4 earthquake near Chignik, Alaska?
The magnitude 3.4 earthquake that struck 105 km ENE of Chignik, Alaska on June 5, 2021 at 22:10 UTC had a depth of 81.8 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 3.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.4 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak02176czx7d). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, June 5, 2021). M3.4 Earthquake 105 km ENE of Chignik, Alaska — June 5, 2021. Retrieved August 24, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak02176czx7d/