M4.0 Earthquake 113 km NW of Tobelo, Indonesia — April 20, 2023
2023-04-20 19:08:40 UTC (2023-04-20) · approx. 3:08 AM UTC+8 local
On April 20, 2023 at 19:08 UTC, a magnitude 4.0 intermediate depth earthquake struck 113 km NW of Tobelo, Indonesia, at a depth of 96.1 km and coordinates 2.4067°, 127.2476°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
127.2476°E
Technical Information
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Common Questions
How strong was the magnitude 4.0 earthquake near Tobelo, Indonesia?
The magnitude 4.0 earthquake that struck 113 km NW of Tobelo, Indonesia on April 20, 2023 at 19:08 UTC had a depth of 96.1 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000jw9b). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, April 20, 2023). M4.0 Earthquake 113 km NW of Tobelo, Indonesia — April 20, 2023. Retrieved July 3, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jw9b/