M3.3 Earthquake 119 km E of Chignik, Alaska — December 14, 2020
2020-12-14 20:19:19 UTC (2020-12-14) · approx. 10:19 AM UTC-10 local
On December 14, 2020 at 20:19 UTC, a magnitude 3.3 shallow crustal earthquake struck 119 km E of Chignik, Alaska, at a depth of 45.8 km and coordinates 56.3571°, -156.4739°.
Physical scale: An earthquake of magnitude 3.3 releases seismic energy equivalent to roughly 1.3 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 114 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-156.4739°E
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Common Questions
How strong was the magnitude 3.3 earthquake near Chignik, Alaska?
The magnitude 3.3 earthquake that struck 119 km E of Chignik, Alaska on December 14, 2020 at 20:19 UTC had a depth of 45.8 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 3.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.3 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak020g1ikwcv). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 14, 2020). M3.3 Earthquake 119 km E of Chignik, Alaska — December 14, 2020. Retrieved February 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak020g1ikwcv/