M4.6 Earthquake 201 km SE of Port Blair, India — April 21, 2021
2021-04-21 19:34:42 UTC (2021-04-21) · approx. 1:34 AM UTC+6 local
On April 21, 2021 at 19:34 UTC, a magnitude 4.6 shallow crustal earthquake struck 201 km SE of Port Blair, India, at a depth of 26.1 km and coordinates 10.5902°, 94.2339°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
94.2339°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Port Blair, India?
The magnitude 4.6 earthquake that struck 201 km SE of Port Blair, India on April 21, 2021 at 19:34 UTC had a depth of 26.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 10.5902°, 94.2339°, which is 201 km SE of Port Blair, India.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Actions
Location
Authoritative source: USGS event page (event ID: us7000dxx6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 21, 2021). M4.6 Earthquake 201 km SE of Port Blair, India — April 21, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000dxx6/