M4.2 Earthquake 77 km WSW of Banda Aceh, Indonesia — January 8, 2021
2021-01-08 23:17:13 UTC (2021-01-08) · approx. 5:17 AM UTC+6 local
On January 8, 2021 at 23:17 UTC, a magnitude 4.2 shallow crustal earthquake struck 77 km WSW of Banda Aceh, Indonesia, at a depth of 61.3 km and coordinates 5.1995°, 94.7194°.
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
94.7194°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Banda Aceh, Indonesia?
The magnitude 4.2 earthquake that struck 77 km WSW of Banda Aceh, Indonesia on January 8, 2021 at 23:17 UTC had a depth of 61.3 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: us7000d13m). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, January 8, 2021). M4.2 Earthquake 77 km WSW of Banda Aceh, Indonesia — January 8, 2021. Retrieved March 20, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000d13m/