M4.3 Earthquake in the Hokkaido, Japan region — October 15, 2020
2020-10-15 23:03:57 UTC (2020-10-15) · approx. 9:03 AM UTC+10 local
On October 15, 2020 at 23:03 UTC, a magnitude 4.3 intermediate depth earthquake struck in the Hokkaido, Japan region, at a depth of 87.3 km and coordinates 42.4373°, 143.7537°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.7537°E
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Common Questions
How strong was the magnitude 4.3 earthquake in the Hokkaido, Japan region?
The magnitude 4.3 earthquake that struck in the Hokkaido, Japan region on October 15, 2020 at 23:03 UTC had a depth of 87.3 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000cal1). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 15, 2020). M4.3 Earthquake in the Hokkaido, Japan region — October 15, 2020. Retrieved December 29, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000cal1/