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Strong mag. 5.9 earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 at 9:13 am (GMT +5:30)

Strong mag. 5.9 earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 at 9:13 am (GMT +5:30) Strong mag. 5.9 earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 at 9:13 am (GMT +5:30)

Strong magnitude 5.9 earthquake at 10 km depth

3 Aug 04:00 UTC: First to report: GFZ after 17 minutes.
3 Aug 04:35: Now using data updates from NCS
3 Aug 04:38: Epicenter location corrected by 20 km (13 mi) towards NW.

Earthquake details

Date & timeAug 3, 2021 03:43:55 UTC
Local time at epicenterTuesday, Aug 3, 2021 at 9:13 am (GMT +5:30)
Depth10.0 km
Epicenter latitude / longitude9.19°N / 93.94°E (Andaman Sea, India)
Antipode9.19°S / 86.06°W
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceNCS (National Center for Seismology)
Nearby towns and cities305 km (189 mi) SSE of Port Blair (pop: 112,100) | Show on map | Quakes nearby
397 km (247 mi) NNW of Sabang (Indonesia) (pop: 24,500) | Show on map | Quakes nearby
138 km (85 mi) NE of Teressa Island (pop: 1,930) | Show on map | Quakes nearby
321 km (200 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: 11 m/s (20 kts) from WSW
Estimated seismic energy released4.5 x 1013 joules (12.4 gigawatt hours, equivalent to 10676 tons of TNT or 0.7 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.
5.910 kmIndia: Nicobar IslandsNCS
5.810 kmNicobar Islands, India RegionUSGS
5.910 kmIndia [Sea]INGV
5.910 kmIndia: Nicobar IslandsGFZ
5.510 kmNicobar Islands, India RegionGeoAu


Seismic station: Chiang Mai, Thailand (CHTO/IU network) | Distance from quake: 1198 km / 745 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. Bandpass filter applied: 0.02-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.


[More info]

Recorded aftershocks, latest first (4 quakes)

Date and timeMag
Sep 24, 2021 15:04
1 year 19 weeks ago

63 km
Andaman Sea, IndiaMore
Sep 4, 2021 18:27
1 year 21 weeks ago

10 km
Andaman Sea, IndiaMore
Aug 6, 2021 08:19
1 year 26 weeks ago

150 km
Andaman Sea, IndiaMore
Aug 5, 2021 12:46
1 year 26 weeks ago - felt

100 km
Andaman Sea, IndiaMore

Earlier earthquakes in the same area

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