M4.1 Earthquake 40 km NNW of Pototano, Indonesia — April 9, 2021
2021-04-09 20:09:03 UTC (2021-04-09) · approx. 4:09 AM UTC+8 local
On April 9, 2021 at 20:09 UTC, a magnitude 4.1 shallow crustal earthquake struck 40 km NNW of Pototano, Indonesia, at a depth of 10.0 km and coordinates -8.1054°, 117.2754°.
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
117.2754°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.1 earthquake near Pototano, Indonesia?
The magnitude 4.1 earthquake that struck 40 km NNW of Pototano, Indonesia on April 9, 2021 at 20:09 UTC had a depth of 10.0 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: us6000e1vc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 9, 2021). M4.1 Earthquake 40 km NNW of Pototano, Indonesia — April 9, 2021. Retrieved June 19, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e1vc/