M4.2 Earthquake 101 km SE of Port Blair, India — July 7, 2021
2021-07-07 20:21:09 UTC (2021-07-07) · approx. 2:21 AM UTC+6 local
On July 7, 2021 at 20:21 UTC, a magnitude 4.2 intermediate depth earthquake struck 101 km SE of Port Blair, India, at a depth of 96.7 km and coordinates 11.0785°, 93.4623°.
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
93.4623°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Port Blair, India?
The magnitude 4.2 earthquake that struck 101 km SE of Port Blair, India on July 7, 2021 at 20:21 UTC had a depth of 96.7 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: us7000elju). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 7, 2021). M4.2 Earthquake 101 km SE of Port Blair, India — July 7, 2021. Retrieved September 10, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000elju/