M4.2 Earthquake 26 km ENE of Severo-Kuril’sk, Russia — December 30, 2021
2021-12-30 19:39:33 UTC (2021-12-30) · approx. 5:39 AM UTC+10 local
On December 30, 2021 at 19:39 UTC, a magnitude 4.2 intermediate depth earthquake struck 26 km ENE of Severo-Kuril’sk, Russia, at a depth of 104.2 km and coordinates 50.7238°, 156.4988°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
156.4988°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Severo-Kuril’sk, Russia?
The magnitude 4.2 earthquake that struck 26 km ENE of Severo-Kuril’sk, Russia on December 30, 2021 at 19:39 UTC had a depth of 104.2 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000gaxr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 30, 2021). M4.2 Earthquake 26 km ENE of Severo-Kuril’sk, Russia — December 30, 2021. Retrieved March 5, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000gaxr/