M5.4 Earthquake near western Indian-Antarctic Ridge — April 20, 2026
2026-04-20 01:21:17 UTC (3 hours ago)
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On April 20, 2026 at 01:21 UTC, a magnitude 5.4 shallow crustal earthquake struck near western Indian-Antarctic Ridge, at a depth of 10.0 km and coordinates -49.6804°, 117.3139°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 33 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 449, placing it among routine seismic activity.
Earthquake Details
117.3139°E
Technical Information
Common Questions
How strong was the magnitude 5.4 earthquake near western Indian-Antarctic Ridge?
The magnitude 5.4 earthquake that struck near western Indian-Antarctic Ridge on April 20, 2026 at 01:21 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -49.6804°, 117.3139°, which is near western Indian-Antarctic Ridge.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.4 earthquakes can continue for days to weeks and gradually diminish over time.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.