M4.1 Earthquake 135 km SSE of Biak, Indonesia — August 28, 2020
2020-08-28 20:10:36 UTC (2020-08-28) · approx. 5:10 AM UTC+9 local
On August 28, 2020 at 20:10 UTC, a magnitude 4.1 shallow crustal earthquake struck 135 km SSE of Biak, Indonesia, at a depth of 54.7 km and coordinates -2.3775°, 136.3386°.
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
136.3386°E
Technical Information
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Common Questions
How strong was the magnitude 4.1 earthquake near Biak, Indonesia?
The magnitude 4.1 earthquake that struck 135 km SSE of Biak, Indonesia on August 28, 2020 at 20:10 UTC had a depth of 54.7 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: us7000bek7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 28, 2020). M4.1 Earthquake 135 km SSE of Biak, Indonesia — August 28, 2020. Retrieved November 7, 2020 from https://www.earthquaketracker.org/earthquakes/event/us7000bek7/