M4.3 Earthquake 163 km SSW of Tomohon, Indonesia — October 21, 2020
2020-10-21 19:49:01 UTC (2020-10-21) · approx. 3:49 AM UTC+8 local
On October 21, 2020 at 19:49 UTC, a magnitude 4.3 shallow crustal earthquake struck 163 km SSW of Tomohon, Indonesia, at a depth of 55.8 km and coordinates -0.1234°, 124.4663°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
124.4663°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Tomohon, Indonesia?
The magnitude 4.3 earthquake that struck 163 km SSW of Tomohon, Indonesia on October 21, 2020 at 19:49 UTC had a depth of 55.8 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000cayh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, October 21, 2020). M4.3 Earthquake 163 km SSW of Tomohon, Indonesia — October 21, 2020. Retrieved January 9, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000cayh/