M4.4 Earthquake 146 km SSE of Port Blair, India — September 14, 2021
2021-09-14 18:47:12 UTC (2021-09-14) · approx. 12:47 AM UTC+6 local
On September 14, 2021 at 18:47 UTC, a magnitude 4.4 intermediate depth earthquake struck 146 km SSE of Port Blair, India, at a depth of 87.8 km and coordinates 10.4507°, 93.2806°.
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
93.2806°E
Technical Information
Common Questions
How strong was the magnitude 4.4 earthquake near Port Blair, India?
The magnitude 4.4 earthquake that struck 146 km SSE of Port Blair, India on September 14, 2021 at 18:47 UTC had a depth of 87.8 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: us7000fb56). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 14, 2021). M4.4 Earthquake 146 km SSE of Port Blair, India — September 14, 2021. Retrieved November 23, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fb56/