M4.2 Earthquake 79 km SSW of Kuril’sk, Russia — April 21, 2021
2021-04-21 19:04:29 UTC (2021-04-21) · approx. 5:04 AM UTC+10 local
On April 21, 2021 at 19:04 UTC, a magnitude 4.2 intermediate depth earthquake struck 79 km SSW of Kuril’sk, Russia, at a depth of 101.3 km and coordinates 44.5450°, 147.5640°.
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
147.5640°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Kuril’sk, Russia?
The magnitude 4.2 earthquake that struck 79 km SSW of Kuril’sk, Russia on April 21, 2021 at 19:04 UTC had a depth of 101.3 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: us7000dxxi). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 21, 2021). M4.2 Earthquake 79 km SSW of Kuril’sk, Russia — April 21, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000dxxi/