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Very strong mag. 6.1 earthquake - Indian Ocean, 165 km southwest of Nias Island, North Sumatra, Indonesia, on Monday, 19 April 2021 at 23:58 (GMT)

Very strong mag. 6.1 earthquake - Indian Ocean, 277 km southwest of Singkil, Aceh, Indonesia, on 20 Apr 5:58 am (GMT +6)

Very strong mag. 6.1 earthquake - Indian Ocean, 277 km southwest of Singkil, Aceh, Indonesia, on 20 Apr 5:58 am (GMT +6) Very strong mag. 6.1 earthquake - Indian Ocean, 277 km southwest of Singkil, Aceh, Indonesia, on 20 Apr 5:58 am (GMT +6)

Very strong magnitude 6.1 earthquake at 16 km depth

20 Apr 00:10 UTC: First to report: GFZ after 12 minutes.
20 Apr 00:07: Magnitude recalculated from 5.8 to 5.9. Epicenter location corrected by 3.5 km (2.2 mi) towards SSW.
20 Apr 00:10: Now using data updates from BMKG
20 Apr 00:15: Magnitude recalculated from 5.7 to 6.1. Hypocenter depth recalculated from 10.0 to 16.0 km (from 6.2 to 9.9 mi).

Earthquake details

Date & timeApr 19, 2021 23:58:22 UTC
Local time at epicenter20 Apr 5:58 am (GMT +6)
StatusConfirmed
Magnitude6.1
Depth16.0 km
Epicenter latitude / longitude0.17°N / 96.48°E (Indian Ocean, Indonesia)
Antipode0.17°S / 83.52°W
Shaking intensityStrong shaking near epicenter
Felt1 report
Primary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearby towns and cities257 km (160 mi) S of Sinabang (Kabupaten Simeulue) (pop: 15,000) | Show on map | Quakes nearby
277 km (172 mi) SSW of Singkil (pop: 46,800) | Show on map | Quakes nearby
310 km (193 mi) SW of Sibolga (pop: 79,700) | Show on map | Quakes nearby
338 km (210 mi) WSW of Padangsidempuan (pop: 100,600) | Show on map | Quakes nearby
423 km (263 mi) SW of Pematangsiantar (pop: 209,600) | Show on map | Quakes nearby
430 km (267 mi) WSW of Rantauprapat (pop: 103,000) | Show on map | Quakes nearby
442 km (275 mi) SSW of Binjai (pop: 228,800) | Show on map | Quakes nearby
447 km (278 mi) SSW of Sunggal (pop: 157,900) | Show on map | Quakes nearby
451 km (280 mi) SSW of Medan (pop: 1,751,000) | Show on map | Quakes nearby
467 km (290 mi) SW of Percut (pop: 311,100) | Show on map | Quakes nearby
165 km (103 mi) SW of Nias Island (pop: 756,300) | Show on map | Quakes nearby
Weather at epicenter at time of quakeScattered Clouds 28°C (82 F), humidity: 72%, wind: 2 m/s (4 kts) from NNE
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
6.116 kmOff West Coast of Northern Sumatra, IndonesiaBMKG
6.030 kmNIAS REGION, INDONESIAEMSC
5.910 kmNear Medan, IndonesiaRENASS
6.010 kmOff West Coast of Northern Sumatra, IndonesiaGFZ
6.19 km255 Km S of Sinabang, IndonesiaUSGS
6.118 kmOff West Coast of Northern Sumatra, IndonesiaGeoAu
5.910 km印尼苏门答腊岛西部海域, IndonesiaCEIC
6.120 kmOff West Coast of Northern Sumatera, Indonesia [Sea: Indonesia]INGV

Seismograms

Seismic station: Chiang Mai, Thailand (CHTO/IU network) | Distance from quake: 2090 km / 1299 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 (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Translate
Jakarta (1361.1 km ESE of epicenter) [Map] / not felt
Bedugul, Bali (2325 km ESE of epicenter) [Map] / not felt (reported through our app)
Deli Tua, North Sumatra (439.9 km NNE of epicenter) [Map] / not felt (reported through our app)
En lima / not felt
SENAI (818 km ENE of epicenter) [Map] / not felt (reported through our app)
Padang / Very weak shaking (MMI II) / single lateral shake / 2-5 s

Aftershocks

[More info]

Recorded aftershocks, latest first (105 quakes)

Date and timeMag
Depth
LocationDetails
Oct 4, 2021 09:44
1 year 10 weeks ago
3.5

30 km
Indian Ocean, 251 km SW of Sibolga, North Sumatra, IndonesiaMore
Sep 24, 2021 23:47
1 year 11 weeks ago
2.9

10 km
Indian Ocean, IndonesiaMore
Sep 16, 2021 16:45
1 year 12 weeks ago
3.9

33 km
Indian Ocean, 257 km SW of Sibolga, North Sumatra, IndonesiaMore
Sep 6, 2021 06:15
1 year 14 weeks ago
3.8

10 km
Indian Ocean, 287 km SW of Sibolga, North Sumatra, IndonesiaMore
Aug 27, 2021 13:08
1 year 15 weeks ago
3.4

10 km
Indian Ocean, 258 km SW of Singkil, Aceh, IndonesiaMore
Aug 24, 2021 17:18
1 year 15 weeks ago
4.9

39 km
Indian Ocean, 296 km SW of Sibolga, North Sumatra, IndonesiaMore
Aug 14, 2021 22:01
1 year 17 weeks ago
3.4

10 km
Indian Ocean, 262 km SW of Singkil, Aceh, IndonesiaMore
Aug 4, 2021 16:20
1 year 18 weeks ago
4.0

10 km
Indian Ocean, IndonesiaMore
Jul 24, 2021 21:42
1 year 20 weeks ago
4.3

16 km
Indian Ocean, 283 km SW of Singkil, Aceh, IndonesiaMore
Jul 23, 2021 11:15
1 year 20 weeks ago
4.0

10 km
Indian Ocean, 273 km SW of Singkil, Aceh, IndonesiaMore
Jul 13, 2021 13:49
1 year 21 weeks ago
3.5

10 km
Indian Ocean, 259 km SW of Singkil, Aceh, IndonesiaMore
Jul 10, 2021 00:26
1 year 22 weeks ago
4.0

10 km
Indian Ocean, 268 km SW of Singkil, Aceh, IndonesiaMore
Jun 25, 2021 11:19
1 year 24 weeks ago
3.6

10 km
Indian Ocean, 289 km SW of Singkil, Aceh, IndonesiaMore
Jun 25, 2021 11:10
1 year 24 weeks ago
3.3

10 km
Indian Ocean, 285 km SW of Singkil, Aceh, IndonesiaMore
Jun 25, 2021 11:03
1 year 24 weeks ago
3.7

10 km
Indian Ocean, 294 km SW of Singkil, Aceh, IndonesiaMore
Jun 17, 2021 13:57
1 year 25 weeks ago
3.4

10 km
Indian Ocean, 270 km SW of Singkil, Aceh, IndonesiaMore
Jun 14, 2021 06:40
1 year 26 weeks ago
4.4

10 km
Indian Ocean, 256 km SW of Sibolga, North Sumatra, IndonesiaMore
Jun 11, 2021 04:00
1 year 26 weeks ago
4.3

10 km
Indian Ocean, 280 km SW of Singkil, Aceh, IndonesiaMore
Jun 10, 2021 23:34
1 year 26 weeks ago
3.7

12 km
Indian Ocean, 294 km SW of Singkil, Aceh, IndonesiaMore
Jun 8, 2021 16:32
1 year 26 weeks ago
4.6

10 km
Indian Ocean, 270 km SW of Sibolga, North Sumatra, IndonesiaMore
Jun 7, 2021 19:03
1 year 27 weeks ago
3.6

13 km
Indian Ocean, 287 km SW of Singkil, Aceh, IndonesiaMore
Jun 5, 2021 14:14
1 year 27 weeks ago
3.9

10 km
Indian Ocean, 292 km SW of Sibolga, North Sumatra, IndonesiaMore
Jun 5, 2021 12:06
1 year 27 weeks ago
4.9

10 km
Indian Ocean, 281 km SW of Singkil, Aceh, IndonesiaMore
Jun 4, 2021 13:34
1 year 27 weeks ago
4.7

12 km
Indian Ocean, 271 km SW of Sibolga, North Sumatra, IndonesiaMore
May 31, 2021 12:16
1 year 28 weeks ago
4.2

19 km
Indian Ocean, 291 km SW of Sibolga, North Sumatra, IndonesiaMore
May 31, 2021 07:59
1 year 28 weeks ago
4.4

10 km
Indian Ocean, IndonesiaMore
May 30, 2021 23:47
1 year 28 weeks ago
4.1

10 km
Indian Ocean, 280 km SW of Singkil, Aceh, IndonesiaMore
May 30, 2021 19:13
1 year 28 weeks ago
4.1

22 km
Indian Ocean, 274 km SW of Singkil, Aceh, IndonesiaMore
May 30, 2021 02:19
1 year 28 weeks ago
3.4

12 km
Indian Ocean, 237 km SW of Singkil, Aceh, IndonesiaMore
May 29, 2021 23:48
1 year 28 weeks ago
4.0

10 km
Indian Ocean, 295 km SW of Sibolga, North Sumatra, IndonesiaMore
May 28, 2021 01:08
1 year 28 weeks ago
4.6

17 km
Indian Ocean, 276 km SW of Singkil, Aceh, IndonesiaMore
May 27, 2021 18:38
1 year 28 weeks ago
4.6

10 km
Indian Ocean, 279 km SW of Sibolga, North Sumatra, IndonesiaMore
May 26, 2021 13:56
1 year 28 weeks ago
3.5

62 km
Indian Ocean, 268 km SW of Singkil, Aceh, IndonesiaMore
May 26, 2021 09:00
1 year 28 weeks ago
3.8

18 km
Indian Ocean, 291 km SW of Sibolga, North Sumatra, IndonesiaMore
May 25, 2021 11:29
1 year 28 weeks ago
3.5

15 km
Indian Ocean, 280 km SW of Sibolga, North Sumatra, IndonesiaMore
May 24, 2021 22:16
1 year 28 weeks ago
3.8

16 km
Indian Ocean, 278 km SW of Singkil, Aceh, IndonesiaMore
May 24, 2021 16:10
1 year 29 weeks ago
3.6

10 km
Indian Ocean, 264 km SW of Singkil, Aceh, IndonesiaMore
May 24, 2021 02:17
1 year 29 weeks ago
3.8

12 km
Indian Ocean, 298 km SW of Sibolga, North Sumatra, IndonesiaMore
May 23, 2021 15:33
1 year 29 weeks ago
3.0

30 km
Indian Ocean, 274 km SW of Sibolga, North Sumatra, IndonesiaMore
May 23, 2021 14:01
1 year 29 weeks ago
2.9

25 km
Indian Ocean, IndonesiaMore
May 23, 2021 13:17
1 year 29 weeks ago
3.7

37 km
Indian Ocean, 248 km SW of Singkil, Aceh, IndonesiaMore
May 23, 2021 13:16
1 year 29 weeks ago
3.8

17 km
Indian Ocean, 280 km SW of Sibolga, North Sumatra, IndonesiaMore
May 23, 2021 06:59
1 year 29 weeks ago
3.5

10 km
Indian Ocean, 274 km SW of Sibolga, North Sumatra, IndonesiaMore
May 22, 2021 20:01
1 year 29 weeks ago
3.6

10 km
Indian Ocean, 236 km SW of Singkil, Aceh, IndonesiaMore
May 22, 2021 16:37
1 year 29 weeks ago
3.4

17 km
Indian Ocean, 239 km SW of Singkil, Aceh, IndonesiaMore
May 22, 2021 15:25
1 year 29 weeks ago
4.3

10 km
Indian Ocean, 283 km SW of Sibolga, North Sumatra, IndonesiaMore
May 21, 2021 04:17
1 year 29 weeks ago
3.3

10 km
Indian Ocean, 230 km SW of Singkil, Aceh, IndonesiaMore
May 20, 2021 23:16
1 year 29 weeks ago
3.6

10 km
Indian Ocean, 293 km SW of Singkil, Aceh, IndonesiaMore
May 20, 2021 15:23
1 year 29 weeks ago
3.5

10 km
Indian Ocean, 293 km SW of Singkil, Aceh, IndonesiaMore
May 20, 2021 00:05
1 year 29 weeks ago
4.0

10 km
Indian Ocean, 297 km SW of Sibolga, North Sumatra, IndonesiaMore
May 19, 2021 23:47
1 year 29 weeks ago
4.3

28 km
Indian Ocean, 287 km SW of Sibolga, North Sumatra, IndonesiaMore
May 19, 2021 09:17
1 year 29 weeks ago
4.5

10 km
Indian Ocean, 288 km SW of Singkil, Aceh, IndonesiaMore
May 19, 2021 09:01
1 year 29 weeks ago
3.5

13 km
Indian Ocean, 252 km SW of Sibolga, North Sumatra, IndonesiaMore
May 18, 2021 21:34
1 year 29 weeks ago
4.8

24 km
Indian Ocean, 280 km SW of Sibolga, North Sumatra, IndonesiaMore
May 17, 2021 12:21
1 year 30 weeks ago
5.3

13 km
Indian Ocean, 277 km SW of Singkil, Aceh, IndonesiaMore
May 17, 2021 03:44
1 year 30 weeks ago
3.6

15 km
Indian Ocean, 265 km SW of Sibolga, North Sumatra, IndonesiaMore
May 17, 2021 02:32
1 year 30 weeks ago
3.9

40 km
Indian Ocean, 296 km SW of Sibolga, North Sumatra, IndonesiaMore
May 16, 2021 14:06
1 year 30 weeks ago
3.8

47 km
Indian Ocean, 278 km SW of Sibolga, North Sumatra, IndonesiaMore
May 16, 2021 07:14
1 year 30 weeks ago
3.9

46 km
Indian Ocean, 283 km SW of Sibolga, North Sumatra, IndonesiaMore
May 16, 2021 04:59
1 year 30 weeks ago
3.7

26 km
Indian Ocean, 287 km SW of Sibolga, North Sumatra, IndonesiaMore
May 16, 2021 02:07
1 year 30 weeks ago
3.7

13 km
Indian Ocean, 262 km SW of Sibolga, North Sumatra, IndonesiaMore
May 16, 2021 00:11
1 year 30 weeks ago
4.2

13 km
Indian Ocean, 277 km SW of Sibolga, North Sumatra, IndonesiaMore
May 15, 2021 17:47
1 year 30 weeks ago
4.0

10 km
Indian Ocean, 287 km SW of Singkil, Aceh, IndonesiaMore
May 15, 2021 17:04
1 year 30 weeks ago
3.9

20 km
Indian Ocean, 277 km SW of Singkil, Aceh, IndonesiaMore
May 15, 2021 15:47
1 year 30 weeks ago
4.3

10 km
Indian Ocean, 293 km SW of Sibolga, North Sumatra, IndonesiaMore
May 15, 2021 08:04
1 year 30 weeks ago
3.5

10 km
Indian Ocean, 256 km SW of Sibolga, North Sumatra, IndonesiaMore
May 15, 2021 06:28
1 year 30 weeks ago
3.9

10 km
Indian Ocean, 256 km SW of Sibolga, North Sumatra, IndonesiaMore
May 15, 2021 01:53
1 year 30 weeks ago
4.9

11 km
Indian Ocean, 283 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 20:42
1 year 30 weeks ago
3.9

10 km
Indian Ocean, 284 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 20:29
1 year 30 weeks ago
3.4

12 km
Indian Ocean, 288 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 20:25
1 year 30 weeks ago
3.1

14 km
Indian Ocean, 290 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 18:51
1 year 30 weeks ago
4.7

10 km
Indian Ocean, 276 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 17:02
1 year 30 weeks ago
4.6

10 km
Indian Ocean, 277 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 16:51
1 year 30 weeks ago
4.4

10 km
Indian Ocean, 277 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 15:18
1 year 30 weeks ago
3.6

10 km
Indian Ocean, 282 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 13:15
1 year 30 weeks ago
4.2

25 km
Indian Ocean, 295 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 10:25
1 year 30 weeks ago
3.9

49 km
Indian Ocean, 294 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 10:08
1 year 30 weeks ago
3.3

66 km
Indian Ocean, 300 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 09:59
1 year 30 weeks ago
3.8

65 km
Indian Ocean, 280 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 09:48
1 year 30 weeks ago
4.5

48 km
Indian Ocean, 283 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 09:35
1 year 30 weeks ago
3.5

48 km
Indian Ocean, 274 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 09:16
1 year 30 weeks ago
5.2

10 km
Indian Ocean, 295 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 08:10
1 year 30 weeks ago
4.0

10 km
Indian Ocean, 300 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 07:53
1 year 30 weeks ago
3.9

10 km
Indian Ocean, 277 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 07:48
1 year 30 weeks ago
4.6

10 km
Indian Ocean, 292 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 07:32
1 year 30 weeks ago
3.9

21 km
Indian Ocean, 277 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 07:27
1 year 30 weeks ago
4.0

24 km
Indian Ocean, 288 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 07:16
1 year 30 weeks ago
5.0

10 km
Indian Ocean, 295 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 07:01
1 year 30 weeks ago
4.5

27 km
Indian Ocean, 295 km SW of Sibolga, North Sumatra, IndonesiaMore
May 14, 2021 06:43
1 year 30 weeks ago
5.1

10 km
Indian Ocean, 284 km SW of Singkil, Aceh, IndonesiaMore
May 14, 2021 06:33
1 year 30 weeks ago - felt
6.7

10 km
Indian Ocean, 293 km SW of Sibolga, North Sumatra, IndonesiaMore
May 3, 2021 17:04
1 year 32 weeks ago
3.7

30 km
Indian Ocean, 245 km SW of Sibolga, North Sumatra, IndonesiaMore
May 3, 2021 14:11
1 year 32 weeks ago
4.6

24 km
Indian Ocean, 292 km SW of Sibolga, North Sumatra, IndonesiaMore
Apr 28, 2021 03:23
1 year 32 weeks ago
3.9

10 km
Indian Ocean, 272 km SW of Singkil, Aceh, IndonesiaMore
Apr 27, 2021 15:31
1 year 32 weeks ago
3.6

61 km
Indian Ocean, 254 km SW of Singkil, Aceh, IndonesiaMore
Apr 27, 2021 01:38
1 year 32 weeks ago
4.2

10 km
Indian Ocean, 297 km SW of Sibolga, North Sumatra, IndonesiaMore
Apr 25, 2021 22:26
1 year 33 weeks ago
3.6

15 km
Indian Ocean, 292 km SW of Sibolga, North Sumatra, IndonesiaMore
Apr 25, 2021 00:19
1 year 33 weeks ago
4.1

68 km
Indian Ocean, 296 km SW of Singkil, Aceh, IndonesiaMore
Apr 24, 2021 23:35
1 year 33 weeks ago
4.4

10 km
Indian Ocean, 285 km SW of Singkil, Aceh, IndonesiaMore
Apr 24, 2021 11:04
1 year 33 weeks ago
4.3

10 km
Indian Ocean, 295 km SW of Sibolga, North Sumatra, IndonesiaMore
Apr 21, 2021 13:34
1 year 33 weeks ago
3.3

26 km
Indian Ocean, 293 km SW of Sibolga, North Sumatra, IndonesiaMore
Apr 21, 2021 02:00
1 year 33 weeks ago
3.5

10 km
Indian Ocean, 268 km SW of Singkil, Aceh, IndonesiaMore
Apr 20, 2021 19:36
1 year 33 weeks ago
3.3

15 km
Indian Ocean, 288 km SW of Singkil, Aceh, IndonesiaMore
Apr 20, 2021 02:23
1 year 33 weeks ago
4.0

10 km
Indian Ocean, 284 km SW of Singkil, Aceh, IndonesiaMore
Apr 20, 2021 02:07
1 year 33 weeks ago
3.6

10 km
Indian Ocean, 262 km SW of Singkil, Aceh, IndonesiaMore
Show all

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