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Strong mag. 5.6 earthquake - Andaman Sea, India, on Wednesday, Aug 4, 2021 at 11:27 pm (GMT +5:30)

This quake was likely an aftershock of the 6.1 quake Andaman Sea, India, Aug 3, 2021 9:12 am (GMT +5:30), which had occurred 1 day 14 hours earlier.
Strong mag. 5.6 earthquake - Andaman Sea, India, on Wednesday, Aug 4, 2021 at 11:27 pm (GMT +5:30) Strong mag. 5.6 earthquake - Andaman Sea, India, on Wednesday, Aug 4, 2021 at 11:27 pm (GMT +5:30)

Strong magnitude 5.6 earthquake at 13 km depth

4 Aug 18:07 UTC: First to report: GFZ after 9 minutes.
4 Aug 18:08: Epicenter location corrected by 3.1 km (1.9 mi) towards SW.
4 Aug 18:16: Now using data updates from NCS
4 Aug 19:34: Magnitude recalculated from 4.9 to 5.6. Hypocenter depth recalculated from 10.0 to 13.0 km (from 6.2 to 8.1 mi).

Earthquake details

Date & timeAug 4, 2021 17:57:50 UTC
Local time at epicenterWednesday, Aug 4, 2021 at 11:27 pm (GMT +5:30)
StatusConfirmed
Magnitude5.6
Depth13.0 km
Epicenter latitude / longitude8.76°N / 94.22°E (Andaman Sea, India)
Antipode8.76°S / 85.78°W
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceNCS (National Center for Seismology)
Nearby towns and cities341 km (212 mi) NNW of Sabang (Indonesia) (pop: 24,500) | Show on map | Quakes nearby
361 km (224 mi) SSE of Port Blair (pop: 112,100) | Show on map | Quakes nearby
378 km (235 mi) NNW of Banda Aceh (Indonesia) (pop: 250,800) | Show on map | Quakes nearby
422 km (262 mi) NNW of Sigli (Kabupaten Pidie, Indonesia) (pop: 17,500) | Show on map | Quakes nearby
455 km (283 mi) NNW of Reuleuet (Indonesia) (pop: 40,400) | Show on map | Quakes nearby
481 km (299 mi) NW of Bireun (Kabupaten Bireuen, Indonesia) (pop: 25,800) | Show on map | Quakes nearby
513 km (319 mi) NW of Lhokseumawe (Indonesia) (pop: 89,000) | Show on map | Quakes nearby
134 km (83 mi) ENE of Teressa Island (pop: 1,930) | Show on map | Quakes nearby
378 km (235 mi) SE of North Sentinel Island (pop: 50) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 28.4°C (83 F), humidity: 80%, wind: 11 m/s (21 kts) from WSW
Estimated seismic energy released1.6 x 1013 joules (4.4 gigawatt hours, equivalent to 3788 tons of TNT or 0.2 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
5.613 kmIndia: Nicobar IslandsNCS
5.210 kmIndia: Near Banda AcehRENASS
5.630 kmNICOBAR ISLANDS, INDIA REGIONEMSC
5.210 kmNicobar Islands, India RegionTMD
5.2161 kmNicobar Islands, India RegionBMKG
5.510 kmIndia: Nicobar IslandsGFZ
5.55 kmNicobar Islands, India RegionUSGS
5.610 kmNicobar Islands, India RegionGeoAu

Seismograms

Seismic station: Chiang Mai, Thailand (CHTO/IU network) | Distance from quake: 1229 km / 763 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.

Earlier earthquakes in the same area

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