M4.4 Earthquake 12 km NNW of Miyako, Japan — August 18, 2023
2023-08-18 18:22:25 UTC (2023-08-18) · approx. 3:22 AM UTC+9 local
On August 18, 2023 at 18:22 UTC, a magnitude 4.4 shallow crustal earthquake struck 12 km NNW of Miyako, Japan, at a depth of 58.3 km and coordinates 39.7461°, 141.8842°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
141.8842°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Miyako, Japan?
The magnitude 4.4 earthquake that struck 12 km NNW of Miyako, Japan on August 18, 2023 at 18:22 UTC had a depth of 58.3 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 4.4 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kpb5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 18, 2023). M4.4 Earthquake 12 km NNW of Miyako, Japan — August 18, 2023. Retrieved October 27, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kpb5/