M4.9 Earthquake 87 km NE of Yonakuni, Japan — November 13, 2020
2020-11-13 07:31:56 UTC (2020-11-13) · approx. 3:31 PM UTC+8 local
On November 13, 2020 at 07:31 UTC, a magnitude 4.9 shallow crustal earthquake struck 87 km NE of Yonakuni, Japan, at a depth of 10.0 km and coordinates 25.0650°, 123.5641°.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Japan, a region characterized by the intersection of four tectonic plates — Pacific, Philippine Sea, Eurasian, and North American — creating multiple subduction zones. The nearest mapped fault system is the Japan Trench. View all earthquakes in Japan.
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Earthquake Details
123.5641°E
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Common Questions
How strong was the magnitude 4.9 earthquake near Yonakuni, Japan?
The magnitude 4.9 earthquake that struck 87 km NE of Yonakuni, Japan on November 13, 2020 at 07:31 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 25.0650°, 123.5641°, which is 87 km NE of Yonakuni, Japan. View all earthquakes in Japan.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Has Japan had earthquakes this big before?
The largest recorded earthquake in Japan was the M9.1 Tohoku earthquake of March 11, 2011. Today's magnitude 4.9 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us7000ce85). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, November 13, 2020). M4.9 Earthquake 87 km NE of Yonakuni, Japan — November 13, 2020. Retrieved January 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000ce85/