M4.2 Earthquake 277 km SSE of Amahai, Indonesia — September 27, 2020
2020-09-27 16:10:48 UTC (2020-09-27) · approx. 1:10 AM UTC+9 local
On September 27, 2020 at 16:10 UTC, a magnitude 4.2 intermediate depth earthquake struck 277 km SSE of Amahai, Indonesia, at a depth of 205.1 km and coordinates -5.6577°, 129.8875°.
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
129.8875°E
Technical Information
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Common Questions
How strong was the magnitude 4.2 earthquake near Amahai, Indonesia?
The magnitude 4.2 earthquake that struck 277 km SSE of Amahai, Indonesia on September 27, 2020 at 16:10 UTC had a depth of 205.1 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 4.2 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: us6000c1ye). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, September 27, 2020). M4.2 Earthquake 277 km SSE of Amahai, Indonesia — September 27, 2020. Retrieved December 5, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000c1ye/