M4.4 Earthquake 104 km SE of King Cove, Alaska — October 4, 2020
2020-10-04 23:19:01 UTC (2020-10-04) · approx. 12:19 PM UTC-11 local
On October 4, 2020 at 23:19 UTC, a magnitude 4.4 shallow crustal earthquake struck 104 km SE of King Cove, Alaska, at a depth of 5.6 km and coordinates 54.3064°, -161.3559°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-161.3559°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near King Cove, Alaska?
The magnitude 4.4 earthquake that struck 104 km SE of King Cove, Alaska on October 4, 2020 at 23:19 UTC had a depth of 5.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000c5k4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 4, 2020). M4.4 Earthquake 104 km SE of King Cove, Alaska — October 4, 2020. Retrieved December 12, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000c5k4/