M4.3 Earthquake 169 km S of Severo-Kuril’sk, Russia — May 18, 2021
2021-05-18 18:43:35 UTC (2021-05-18) · approx. 4:43 AM UTC+10 local
On May 18, 2021 at 18:43 UTC, a magnitude 4.3 shallow crustal earthquake struck 169 km S of Severo-Kuril’sk, Russia, at a depth of 42.7 km and coordinates 49.1541°, 156.0033°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
156.0033°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Severo-Kuril’sk, Russia?
The magnitude 4.3 earthquake that struck 169 km S of Severo-Kuril’sk, Russia on May 18, 2021 at 18:43 UTC had a depth of 42.7 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000e5u4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, May 18, 2021). M4.3 Earthquake 169 km S of Severo-Kuril’sk, Russia — May 18, 2021. Retrieved July 24, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000e5u4/