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Very strong mag. 6.0 earthquake - Indian Ocean on Sunday, Oct 3, 2021 at 12:43 am (GMT +4) -

Very strong mag. 6.0 earthquake - Indian Ocean on Sunday, Oct 3, 2021 at 12:43 am (GMT +4) Very strong mag. 6.0 earthquake - Indian Ocean on Sunday, Oct 3, 2021 at 12:43 am (GMT +4)

Very strong magnitude 6.0 earthquake at 10 km depth

2 Oct 20:53 UTC: First to report: GFZ after 10 minutes.
2 Oct 20:54: Magnitude recalculated from 5.6 to 5.5. Epicenter location corrected by 2.5 km (1.5 mi) towards ESE.
2 Oct 21:02: Magnitude recalculated from 5.5 to 5.9. Epicenter location corrected by 3.3 km (2 mi) towards W.
2 Oct 21:09: Magnitude recalculated from 5.9 to 6.0.

Earthquake details

Date & timeOct 2, 2021 20:43:39 UTC -
Local time at epicenterSunday, Oct 3, 2021 at 12:43 am (GMT +4)
Depth10.0 km
Epicenter latitude / longitude9.22°S / 67.16°E
Antipode9.22°N / 112.84°W
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities
Weather at epicenter at time of quakeFew Clouds 26.2°C (79 F), humidity: 71%, wind: 8 m/s (16 kts) from ESE
Estimated seismic energy released6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
6.010 kmMid Indian RidgeGFZ
5.410 kmNear Port LouisRENASS
5.738 kmMid Indian RidgeBMKG
5.910 kmMid-Indian RidgeUSGS
5.933 kmMid Indian RidgeGeoAu


Seismic station: Diego Garcia, Chagos Islands, Indian Ocean (DGAR/II network) | Distance from quake: 616 km / 383 mi | Show on map | Station Info
Seismic station Diego Garcia, Chagos Islands, Indian Ocean: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Sleeping / not felt : I didn't feel.  
  • Where's Sleeping?
Perth / not felt
Society Hill SC / not felt


[More info]

Recorded aftershocks, latest first (2 quakes)

Date and timeMag
Nov 22, 2021 10:30
44 weeks ago

10 km
Indian OceanMore
Oct 25, 2021 17:44
48 weeks ago

10 km
Indian OceanMore

Earlier earthquakes in the same area

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