M4.2 Earthquake 161 km ESE of Hirara, Japan — November 27, 2021
2021-11-27 23:55:52 UTC (2021-11-27) · approx. 7:55 AM UTC+8 local
On November 27, 2021 at 23:55 UTC, a magnitude 4.2 shallow crustal earthquake struck 161 km ESE of Hirara, Japan, at a depth of 10.0 km and coordinates 24.0754°, 126.6773°.
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
126.6773°E
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Common Questions
How strong was the magnitude 4.2 earthquake near Hirara, Japan?
The magnitude 4.2 earthquake that struck 161 km ESE of Hirara, Japan on November 27, 2021 at 23:55 UTC had a depth of 10.0 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: us6000g8fb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, November 27, 2021). M4.2 Earthquake 161 km ESE of Hirara, Japan — November 27, 2021. Retrieved February 5, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000g8fb/