M4.5 Earthquake near western Indian-Antarctic Ridge — April 21, 2022
2022-04-21 18:38:47 UTC (2022-04-21) · approx. 2:38 AM UTC+8 local
On April 21, 2022 at 18:38 UTC, a magnitude 4.5 shallow crustal earthquake struck near western Indian-Antarctic Ridge, at a depth of 10.0 km and coordinates -49.7590°, 124.9263°.
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.
Earthquake Details
124.9263°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near western Indian-Antarctic Ridge?
The magnitude 4.5 earthquake that struck near western Indian-Antarctic Ridge on April 21, 2022 at 18:38 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 -49.7590°, 124.9263°, which is near western Indian-Antarctic Ridge.
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
Location
Authoritative source: USGS event page (event ID: us7000h6ig). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, April 21, 2022). M4.5 Earthquake near western Indian-Antarctic Ridge — April 21, 2022. Retrieved June 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000h6ig/