M4.4 Earthquake 74 km W of Tobelo, Indonesia — April 20, 2021
2021-04-20 18:16:46 UTC (2021-04-20) · approx. 2:16 AM UTC+8 local
On April 20, 2021 at 18:16 UTC, a magnitude 4.4 intermediate depth earthquake struck 74 km W of Tobelo, Indonesia, at a depth of 132.5 km and coordinates 1.6814°, 127.3458°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
127.3458°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Tobelo, Indonesia?
The magnitude 4.4 earthquake that struck 74 km W of Tobelo, Indonesia on April 20, 2021 at 18:16 UTC had a depth of 132.5 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000e517). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 20, 2021). M4.4 Earthquake 74 km W of Tobelo, Indonesia — April 20, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e517/