M4.9 Earthquake near Southwest Indian Ridge — July 13, 2021
2021-07-13 20:45:22 UTC (2021-07-13) · approx. 12:45 AM UTC+4 local
On July 13, 2021 at 20:45 UTC, a magnitude 4.9 shallow crustal earthquake struck near Southwest Indian Ridge, at a depth of 10.0 km and coordinates -27.7158°, 63.8664°.
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
63.8664°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Southwest Indian Ridge?
The magnitude 4.9 earthquake that struck near Southwest Indian Ridge on July 13, 2021 at 20:45 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 -27.7158°, 63.8664°, which is near Southwest Indian Ridge.
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: us7000elpm). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 13, 2021). M4.9 Earthquake near Southwest Indian Ridge — July 13, 2021. Retrieved September 17, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000elpm/