M4.1 Earthquake 208 km SSE of Shimoda, Japan — January 5, 2021
2021-01-05 21:02:41 UTC (2021-01-05) · approx. 6:02 AM UTC+9 local
On January 5, 2021 at 21:02 UTC, a magnitude 4.1 intermediate depth earthquake struck 208 km SSE of Shimoda, Japan, at a depth of 92.2 km and coordinates 33.0845°, 140.1500°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
140.1500°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Shimoda, Japan?
The magnitude 4.1 earthquake that struck 208 km SSE of Shimoda, Japan on January 5, 2021 at 21:02 UTC had a depth of 92.2 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 4.1 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000d09t). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 5, 2021). M4.1 Earthquake 208 km SSE of Shimoda, Japan — January 5, 2021. Retrieved March 13, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000d09t/