M4.5 Earthquake near Laccadive Sea — September 23, 2021
2021-09-23 19:48:30 UTC (2021-09-23) · approx. 12:48 AM UTC+5 local
Felt by 3 people across nearby locations.
On September 23, 2021 at 19:48 UTC, a magnitude 4.5 shallow crustal earthquake struck near Laccadive Sea, at a depth of 10.0 km and coordinates 5.5906°, 78.9430°.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 3 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
78.9430°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Laccadive Sea?
The magnitude 4.5 earthquake that struck near Laccadive Sea on September 23, 2021 at 19:48 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 5.5906°, 78.9430°, which is near Laccadive Sea.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000ff7l). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 23, 2021). M4.5 Earthquake near Laccadive Sea — September 23, 2021. Retrieved December 7, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000ff7l/