M4.1 Earthquake 110 km NNW of Manado, Indonesia — August 21, 2023
2023-08-21 17:37:04 UTC (2023-08-21) · approx. 1:37 AM UTC+8 local
On August 21, 2023 at 17:37 UTC, a magnitude 4.1 intermediate depth earthquake struck 110 km NNW of Manado, Indonesia, at a depth of 294.1 km and coordinates 2.3355°, 124.3319°.
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
124.3319°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Manado, Indonesia?
The magnitude 4.1 earthquake that struck 110 km NNW of Manado, Indonesia on August 21, 2023 at 17:37 UTC had a depth of 294.1 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 4.1 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kri2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, August 21, 2023). M4.1 Earthquake 110 km NNW of Manado, Indonesia — August 21, 2023. Retrieved October 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kri2/