M4.2 Earthquake 43 km ESE of Koseda, Japan — March 26, 2022
2022-03-26 20:08:50 UTC (2022-03-26) · approx. 5:08 AM UTC+9 local
On March 26, 2022 at 20:08 UTC, a magnitude 4.2 shallow crustal earthquake struck 43 km ESE of Koseda, Japan, at a depth of 48.0 km and coordinates 30.2437°, 131.0728°.
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
131.0728°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Koseda, Japan?
The magnitude 4.2 earthquake that struck 43 km ESE of Koseda, Japan on March 26, 2022 at 20:08 UTC had a depth of 48.0 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.
Actions
Location
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000gyqn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, March 26, 2022). M4.2 Earthquake 43 km ESE of Koseda, Japan — March 26, 2022. Retrieved June 4, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000gyqn/