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Strong mag. 6.1 earthquake - Chagos Archipelago Region (British Indian Ocean Territory) on Monday, 31 August 2020

Very strong mag. 6.1 earthquake - Indian Ocean, British Indian Ocean Territory, 502 km southwest of Hithadhoo, Maldives, on Monday, August 31, 2020 at 17:24 GMT

Very strong mag. 6.1 earthquake - Indian Ocean, British Indian Ocean Territory, 502 km southwest of Hithadhoo, Maldives, on Monday, August 31, 2020 at 17:24 GMT Very strong mag. 6.1 earthquake - Indian Ocean, British Indian Ocean Territory, 502 km southwest of Hithadhoo, Maldives, on Monday, August 31, 2020 at 17:24 GMT

Very strong magnitude 6.1 earthquake at 10 km depth

31 Aug 17:32 UTC: First to report: GFZ after 9 minutes.
Aug 31 17:34: Magnitude recalculated from 5.9 to 5.8.
Aug 31 18:12: Magnitude recalculated from 5.8 to 6.1.

Earthquake details

Date & timeAug 31, 2020 17:24:05 UTC
Local time at epicenter
Depth10.0 km
Epicenter latitude / longitude3.96°S / 70.07°E (Indian Ocean, British Indian Ocean Territory)
Antipode3.96°N / 109.93°W
Shaking intensityStrong shaking
Felt6 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities332 km (206 mi) NNW of Île Lubine (pop: 15) | Show on map | Quakes nearby
502 km (312 mi) SW of Hithadhoo (Addu City, Maldives) (pop: 9,930) | Show on map | Quakes nearby
Estimated seismic energy released8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 atomic bombs!) | about seismic energy
Show interactive Map
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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.
6.110 kmChagos Archipelago Region (British Indian Ocean Territory)GFZ
6.210 kmChagos Archipelago Region (British Indian Ocean Territory)EMSC
6.210 kmChagos Archipelago Region (British Indian Ocean Territory)BMKG
6.110 kmChagos Archipelago region (British Indian Ocean Territory)USGS
6.313 kmChagos Archipelago Region (British Indian Ocean Territory)GeoAu
6.010.2 kmBritish Indian Ocean Territory [Sea]INGV


Seismic station: Kilima Mbogo, Kenya (KMBO/IU network) | Distance from quake: 3659 km / 2273 mi | Show on map | Station Info
Seismic station Kilima Mbogo, Kenya: 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 (14)

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.
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Mark as helpful or interesting.
Send your own user report!
Mauritius (2268.2 km SW of epicenter) [Map] / not felt : For a few weeks now, dolphins' mass stranding on Mauritian bea | 3 users found this interesting.  
Mahebourg (2267.4 km SW of epicenter) [Map] / not felt
Mauritius / not felt : Sea was very rough in the North of Mauritius. A ship had an accident and sunk. Fishermen say that waves were extremely violent and they saw death. Out of 8, three are dead, still searching for one, and three are saved. | 3 users found this interesting.  
Port Mathurin / Very weak shaking (MMI II) : Slight tremor. Dogs barking everywhere | 2 users found this interesting.  
Java / Very weak shaking (MMI II) / single lateral shake / very short : Yess correct EMSC it must be above 6.0 | 7 users found this interesting.  
water / Violent shaking (MMI IX) / complex motion difficult to describe : scary | 3 users found this interesting.  
  • Water is more complex than most know. Is is proven your thoughts, emotions affect change in water. Demonstrates the power of thought. Hold love in your heart.
Chile strong / Very strong shaking (MMI VII) / rattling, vibrating : Yesterday there was an earthquake in Chile in the Atacama area and magnitude was 7.00 | One user found this interesting.  
Le Hochet, Terre Rouge / not felt
Mauritius / not felt
Mauritius / not felt
Addu / Very weak shaking (MMI II)
Addu city / not felt
Addu City / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
(Maldives, 984 km N of epicenter) : Ground feels like I'm floundering in quick sands (reported through EMSC)  


[More info]

Recorded aftershocks, latest first (1 quake)

Date and timeMag
Oct 1, 2020 21:07
2 years ago

10 km
British Indian Ocean Territory, 524 km SW of Hithadhoo, MaldivesMore

Earlier earthquakes in the same area

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