M4.4 Earthquake 59 km E of Shizunai-furukawach?, Japan — March 21, 2022
2022-03-21 20:12:19 UTC (2022-03-21) · approx. 6:12 AM UTC+10 local
On March 21, 2022 at 20:12 UTC, a magnitude 4.4 intermediate depth earthquake struck 59 km E of Shizunai-furukawach?, Japan, at a depth of 70.5 km and coordinates 42.2338°, 143.0764°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 6.0 mainshock that occurred 21 days ago 32 km SSW of Honchō, Japan. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for weeks to months as stresses on surrounding faults redistribute.
Earthquake Details
143.0764°E
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Common Questions
How strong was the magnitude 4.4 earthquake near Shizunai-furukawach?, Japan?
The magnitude 4.4 earthquake that struck 59 km E of Shizunai-furukawach?, Japan on March 21, 2022 at 20:12 UTC had a depth of 70.5 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.
Is this the same earthquake as the M6.0 one earlier?
No. This magnitude 4.4 earthquake is an aftershock of the larger magnitude 6.0 mainshock that occurred earlier 32 km SSW of Honchō, Japan. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000h6ib). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, March 21, 2022). M4.4 Earthquake 59 km E of Shizunai-furukawach?, Japan — March 21, 2022. Retrieved May 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000h6ib/