M4.1 Earthquake 122 km SSW of Modisi, Indonesia — September 16, 2023
2023-09-16 18:20:04 UTC (2023-09-16) · approx. 2:20 AM UTC+8 local
On September 16, 2023 at 18:20 UTC, a magnitude 4.1 shallow crustal earthquake struck 122 km SSW of Modisi, Indonesia, at a depth of 11.5 km and coordinates -0.4760°, 123.8369°.
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
123.8369°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Modisi, Indonesia?
The magnitude 4.1 earthquake that struck 122 km SSW of Modisi, Indonesia on September 16, 2023 at 18:20 UTC had a depth of 11.5 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.
Actions
Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kx30). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 16, 2023). M4.1 Earthquake 122 km SSW of Modisi, Indonesia — September 16, 2023. Retrieved November 18, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kx30/