M3.3 Earthquake 53 km ENE of Pedro Bay, Alaska — December 13, 2020
2020-12-13 17:45:08 UTC (2020-12-13) · approx. 7:45 AM UTC-10 local
On December 13, 2020 at 17:45 UTC, a magnitude 3.3 intermediate depth earthquake struck 53 km ENE of Pedro Bay, Alaska, at a depth of 125.3 km and coordinates 59.9854°, -153.2417°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 5 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
-153.2417°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.3 earthquake near Pedro Bay, Alaska?
The magnitude 3.3 earthquake that struck 53 km ENE of Pedro Bay, Alaska on December 13, 2020 at 17:45 UTC had a depth of 125.3 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: ak020fztesy9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 13, 2020). M3.3 Earthquake 53 km ENE of Pedro Bay, Alaska — December 13, 2020. Retrieved February 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/ak020fztesy9/