M4.9 Earthquake 280 km SSE of Port Blair, India — June 30, 2025
2025-06-30 04:39:02 UTC (2025-06-30) · approx. 10:39 AM UTC+6 local
On June 30, 2025 at 04:39 UTC, a magnitude 4.9 shallow crustal earthquake struck 280 km SSE of Port Blair, India, at a depth of 12.2 km and coordinates 9.4501°, 93.9908°. This earthquake was detected by 175 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
93.9908°E
Technical Information
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Common Questions
How strong was the magnitude 4.9 earthquake near Port Blair, India?
The magnitude 4.9 earthquake that struck 280 km SSE of Port Blair, India on June 30, 2025 at 04:39 UTC had a depth of 12.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 9.4501°, 93.9908°, which is 280 km SSE of Port Blair, India.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us7000q9nl). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 30, 2025). M4.9 Earthquake 280 km SSE of Port Blair, India — June 30, 2025. Retrieved September 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000q9nl/