M4.2 Earthquake 152 km NW of Amahai, Indonesia — July 18, 2023
2023-07-18 18:45:23 UTC (2023-07-18) · approx. 3:45 AM UTC+9 local
On July 18, 2023 at 18:45 UTC, a magnitude 4.2 shallow crustal earthquake struck 152 km NW of Amahai, Indonesia, at a depth of 26.3 km and coordinates -2.2989°, 128.0159°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
128.0159°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Amahai, Indonesia?
The magnitude 4.2 earthquake that struck 152 km NW of Amahai, Indonesia on July 18, 2023 at 18:45 UTC had a depth of 26.3 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kvpe). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 18, 2023). M4.2 Earthquake 152 km NW of Amahai, Indonesia — July 18, 2023. Retrieved September 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kvpe/