M4.3 Earthquake 83 km E of Minami-S?ma, Japan — August 30, 2023
2023-08-30 21:17:18 UTC (2023-08-30) · approx. 6:17 AM UTC+9 local
On August 30, 2023 at 21:17 UTC, a magnitude 4.3 shallow crustal earthquake struck 83 km E of Minami-S?ma, Japan, at a depth of 49.4 km and coordinates 37.7327°, 141.9207°.0
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from submitted citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
141.9207°E
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Common Questions
How strong was the magnitude 4.3 earthquake near Minami-S?ma, Japan?
The magnitude 4.3 earthquake that struck 83 km E of Minami-S?ma, Japan on August 30, 2023 at 21:17 UTC had a depth of 49.4 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: us7000ks74). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 30, 2023). M4.3 Earthquake 83 km E of Minami-S?ma, Japan — August 30, 2023. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ks74/