M4.4 Earthquake southwest of Sumatra, Indonesia — January 20, 2023
2023-01-20 18:15:11 UTC (2023-01-20) · approx. 1:15 AM UTC+7 local
On January 20, 2023 at 18:15 UTC, a magnitude 4.4 shallow crustal earthquake struck southwest of Sumatra, Indonesia, at a depth of 27.6 km and coordinates -5.2051°, 101.8081°.
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
101.8081°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake southwest of Sumatra, Indonesia?
The magnitude 4.4 earthquake that struck southwest of Sumatra, Indonesia on January 20, 2023 at 18:15 UTC had a depth of 27.6 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: us6000jjpp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, January 20, 2023). M4.4 Earthquake southwest of Sumatra, Indonesia — January 20, 2023. Retrieved March 31, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000jjpp/