M4.1 Earthquake 151 km WSW of Naze, Japan — July 4, 2021
2021-07-04 23:04:16 UTC (2021-07-04) · approx. 8:04 AM UTC+9 local
On July 4, 2021 at 23:04 UTC, a magnitude 4.1 shallow crustal earthquake struck 151 km WSW of Naze, Japan, at a depth of 5.5 km and coordinates 28.0164°, 127.9896°.
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
127.9896°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Naze, Japan?
The magnitude 4.1 earthquake that struck 151 km WSW of Naze, Japan on July 4, 2021 at 23:04 UTC had a depth of 5.5 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 4.1 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: us6000et8c). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 4, 2021). M4.1 Earthquake 151 km WSW of Naze, Japan — July 4, 2021. Retrieved September 10, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000et8c/