Contact | RSS | EN | DE | EL | ES | FR | IT | RU

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 09:12 am (GMT +5:30)

Very strong mag. 6.1 Earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 09:12 am (GMT +5:30) Very strong mag. 6.1 Earthquake - Andaman Sea, India, on Tuesday, Aug 3, 2021 09:12 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 09:12 am (GMT +5:30)
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)
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
[smaller] [bigger]

Nearby places

Distance Place Max. shaking intensity(*) Region Country
318 km (197 mi)
NNW of epicenter
Port Blair
(pop: 112,100)
South Andamans, Andaman and Nicobar
384 km (239 mi)
SSE of epicenter
Kuta Sabang
(pop: 42,100)
Kota Sabang, Aceh
421 km (261 mi)
SSE of epicenter
Banda Aceh
(pop: 255,000)
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

Compare Quake Data

Data for the same earthquake as reported by different agencies

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 Depth Time GMT Epicenter Agency
6.1 10 km (6.2 mi) (*) 2021-08-3 03:42:12 Nicobar Islands, India Region NCS (National Center for Seismology)
6.1 10 km (6.2 mi) (*) 2021-08-3 03:42:35 NICOBAR ISLANDS, INDIA REGION
17 km (10.7 mi) epicenter difference with NCS
EMSC (European-Mediterranean Seismological Centre)
5.9 10 km (6.2 mi) (*) 2021-08-3 03:42:15 Nicobar Islands, India Region
74 km (46 mi) epicenter difference with NCS
BMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
5.4 10 km (6.2 mi) (*) 2021-08-3 03:42:11 India: Near Banda Aceh
6.9 km (4.3 mi) epicenter difference with NCS
RENASS (Réseau National de Surveillance Sismique (RéNaSS))
6.0 10 km (6.2 mi) (*) 2021-08-3 03:42:41 India: Nicobar Islands
20 km (13 mi) epicenter difference with NCS
GFZ (German Research Centre for Geosciences)
6.1 10 km (6.2 mi) (*) 2021-08-3 03:42:38 Nicobar Islands, India Region
23 km (14 mi) epicenter difference with NCS
USGS (United States Geological Survey)
6.0 71 km (44 mi) 2021-08-3 03:42:15 India [Sea]
39 km (25 mi) epicenter difference with NCS
INGV (Istituto Nazionale di Geofisica e Vulcanologia)
5.6 21 km (13 mi) 2021-08-3 03:42:10 Nicobar Islands, India Region
49 km (31 mi) epicenter difference with NCS
TMD (Earthquake Observation Division of Thailand)
6.1 19 km (12 mi) 2021-08-3 03:42:40 Nicobar Islands, India Region
17 km (10.4 mi) epicenter difference with NCS
GeoAu (Geoscience Australia )
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.


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. Bandpass filter applied: 0.02-5.0 Hz. 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.
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!
near Mayāng Imphāl, Imphal East, Manipur (1741.4 km N of epicenter) [Map] / not felt : I don't feel (reported through our app)  
Myeik, Tanintharyi (640.7 km NE of epicenter) [Map] / not felt (reported through our app)
Kolkata / Weak shaking (MMI III) / several minutes
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
Yangon / Very weak shaking (MMI II) / single vertical bump / 1-2 s


[More info]

Recorded aftershocks, latest first (12 quakes)

Date and Time GMTMag
Dec 28, 2021 07:06
1 year 48 weeks ago

10 km
Andaman Sea, IndiaMore
Oct 27, 2021 08:41
2 years ago - felt

153 km
Andaman Sea, IndiaMore
Oct 24, 2021 09:47
2 years ago

10 km
Andaman Sea, 280 km SE of Port Blair, South Andamans, Andaman and Nicobar, IndiaMore
Sep 24, 2021 15:04
2 years ago

63 km
Andaman Sea, IndiaMore
Sep 4, 2021 18:27
2 years ago

10 km
Andaman Sea, IndiaMore
Aug 7, 2021 21:17
2 years ago

10 km
Andaman Sea, IndiaMore
Aug 6, 2021 08:19
2 years ago

150 km
Andaman Sea, IndiaMore
Aug 5, 2021 12:46
2 years ago - felt

100 km
Andaman Sea, IndiaMore
Aug 4, 2021 17:57
2 years ago

13 km
Andaman Sea, IndiaMore
Aug 3, 2021 17:20
2 years ago

10 km
Andaman Sea, IndiaMore
Aug 3, 2021 07:39
2 years ago

10 km
Andaman Sea, IndiaMore
Aug 3, 2021 03:43
2 years ago

10 km
Andaman Sea, IndiaMore

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Design upgrade
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Stop Russia's Agression - Support Ukraine
Significant parts of this website use brilliant open-source software developed by Ukrainians. Russia's unprovoked war has killed tens of thousands, displaced millions, and the beautiful country of Ukraine is being destroyed. We cannot be silent even if the topic of this website has nothing to do with politics.
If you like to support Ukraine from abroad:
Ukrainians recommend the Come Back Alive charity. For other options, see StandWithUkraine.
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 297 465 123 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings