M4.2 Earthquake 32 km E of Iwaki, Japan — March 1, 2024
2024-03-01 18:56:30 UTC (2024-03-01) · approx. 3:56 AM UTC+9 local
On March 1, 2024 at 18:56 UTC, a magnitude 4.2 shallow crustal earthquake struck 32 km E of Iwaki, Japan, at a depth of 39.1 km and coordinates 37.0077°, 141.2398°.
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
141.2398°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Iwaki, Japan?
The magnitude 4.2 earthquake that struck 32 km E of Iwaki, Japan on March 1, 2024 at 18:56 UTC had a depth of 39.1 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: us7000m3pz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, March 1, 2024). M4.2 Earthquake 32 km E of Iwaki, Japan — March 1, 2024. Retrieved May 10, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000m3pz/