M4.4 Earthquake 43 km ESE of Kamaishi, Japan — March 17, 2025
2025-03-17 22:30:48 UTC (2025-03-17) · approx. 7:30 AM UTC+9 local
On March 17, 2025 at 22:30 UTC, a magnitude 4.4 shallow crustal earthquake struck 43 km ESE of Kamaishi, Japan, at a depth of 48.9 km and coordinates 39.0710°, 142.2961°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
142.2961°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Kamaishi, Japan?
The magnitude 4.4 earthquake that struck 43 km ESE of Kamaishi, Japan on March 17, 2025 at 22:30 UTC had a depth of 48.9 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 4.4 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000pmx3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, March 17, 2025). M4.4 Earthquake 43 km ESE of Kamaishi, Japan — March 17, 2025. Retrieved May 17, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pmx3/