M4.9 Earthquake 171 km SW of Port Blair, India — September 21, 2024
2024-09-21 16:41:36 UTC (2024-09-21) · approx. 10:41 PM UTC+6 local
On September 21, 2024 at 16:41 UTC, a magnitude 4.9 shallow crustal earthquake struck 171 km SW of Port Blair, India, at a depth of 10.0 km and coordinates 10.5828°, 91.6213°. This earthquake was detected by 130 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
91.6213°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Port Blair, India?
The magnitude 4.9 earthquake that struck 171 km SW of Port Blair, India on September 21, 2024 at 16:41 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 10.5828°, 91.6213°, which is 171 km SW 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.
Actions
Location
Authoritative source: USGS event page (event ID: us6000nti2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 21, 2024). M4.9 Earthquake 171 km SW of Port Blair, India — September 21, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nti2/