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Very strong mag. 6.1 earthquake - Nicobar Islands, India Region, on 2021-08-03 09:12:12 IST

Very strong mag. 6.1 earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 at 9:12 am (GMT +5:30)

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Very strong mag. 6.1 earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 at 9:12 am (GMT +5:30) Very strong mag. 6.1 earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 at 9:12 am (GMT +5:30)

Very strong magnitude 6.1 earthquake at 10 km depth

3 Aug 03:51 UTC: First to report: GFZ after 9 minutes.
3 Aug 03:53: Epicenter location corrected by 4.4 km (2.8 mi) towards N.
3 Aug 03:59: Now using data updates from NCS

Earthquake details

Date & timeAug 3, 2021 03:42:12 UTC -
Local time at epicenterTuesday, Aug 3, 2021 at 9:12 am (GMT +5:30)
StatusConfirmed
Magnitude6.1
Depth10.0 km
Epicenter latitude / longitude9.05°N / 93.91°E (Andaman Sea, India)
Antipode9.05°S / 86.09°W
Shaking intensityStrong shaking near epicenter
Felt2 reports
Primary data sourceNCS (National Center for Seismology)
Nearby towns and cities318 km (197 mi) SSE of Port Blair (pop: 112,100) | Show on map | Quakes nearby
384 km (239 mi) NNW of Sabang (Indonesia) (pop: 24,500) | Show on map | Quakes nearby
421 km (261 mi) NNW of Banda Aceh (Indonesia) (pop: 250,800) | Show on map | Quakes nearby
124 km (77 mi) NE of Teressa Island (pop: 1,930) | Show on map | Quakes nearby
332 km (206 mi) SE of North Sentinel Island (pop: 50) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 28.3°C (83 F), humidity: 80%, wind: 10 m/s (19 kts) from WSW
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.
Mag.DepthLocationSource
6.110 kmNicobar Islands, India RegionNCS
6.110 kmNICOBAR ISLANDS, INDIA REGIONEMSC
5.910 kmNicobar Islands, India RegionBMKG
5.410 kmIndia: Near Banda AcehRENASS
6.010 kmIndia: Nicobar IslandsGFZ
6.110 kmNicobar Islands, India RegionUSGS
6.071 kmIndia [Sea]INGV
5.621 kmNicobar Islands, India RegionTMD
6.119 kmNicobar Islands, India RegionGeoAu

Seismograms

Seismic station: Chiang Mai, Thailand (CHTO/IU network) | Distance from quake: 1214 km / 754 mi | Show on map | Station Info
Seismic station Chiang Mai, Thailand: 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
Show more

User reports for this quake (7)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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near Mayāng Imphāl, Imphal East, Manipur (1741.4 km N of epicenter) [Map] / not felt : I don't feel (reported through our app)  
Aurangabad (2338.1 km WNW of epicenter) [Map] / not felt (reported through our app)
Muralikrishnan tamilnadu india (1795.7 km W of epicenter) [Map] / not felt : No feel (reported through our app)  
Galgamuwa (1492.7 km W of epicenter) [Map] / not felt
Myeik, Tanintharyi (640.7 km NE of epicenter) [Map] / not felt (reported through our app)
Kolkata / Weak shaking (MMI III) / several minutes
Yangon / Very weak shaking (MMI II) / single vertical bump / 1-2 s

Aftershocks

[More info]

Recorded aftershocks, latest first (12 quakes)

Date and timeMag
Depth
LocationDetails
Dec 28, 2021 07:06
49 weeks ago
4.6

10 km
Andaman Sea, IndiaMore
Oct 27, 2021 08:41
1 year 5 weeks ago - felt
4.4

153 km
Andaman Sea, IndiaMore
Oct 24, 2021 09:47
1 year 6 weeks ago
4.7

10 km
Andaman Sea, 280 km SE of Port Blair, South Andamans, Andaman and Nicobar, IndiaMore
Sep 24, 2021 15:04
1 year 10 weeks ago
5.2

63 km
Andaman Sea, IndiaMore
Sep 4, 2021 18:27
1 year 13 weeks ago
4.3

10 km
Andaman Sea, IndiaMore
Aug 7, 2021 21:17
1 year 17 weeks ago
3.8

10 km
Andaman Sea, IndiaMore
Aug 6, 2021 08:19
1 year 17 weeks ago
4.6

150 km
Andaman Sea, IndiaMore
Aug 5, 2021 12:46
1 year 17 weeks ago - felt
5.0

100 km
Andaman Sea, IndiaMore
Aug 4, 2021 17:57
1 year 17 weeks ago
5.6

13 km
Andaman Sea, IndiaMore
Aug 3, 2021 17:20
1 year 17 weeks ago
4.0

10 km
Andaman Sea, IndiaMore
Aug 3, 2021 07:39
1 year 17 weeks ago
4.8

10 km
Andaman Sea, IndiaMore
Aug 3, 2021 03:43
1 year 17 weeks ago
5.9

10 km
Andaman Sea, IndiaMore

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