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Very strong mag. 6.2 earthquake - Indonesia: Northern Molucca Sea on Saturday, 10 July 2021 at 00:43 (GMT)

Very strong mag. 6.2 Earthquake - Molucca Sea, 260 km northeast of Manado, North Sulawesi, Indonesia, on Saturday, Jul 10, 2021, at 08:43 am (Makassar time)

A very strong magnitude 6.2 earthquake occurred in the Molucca Sea 83 km (52 mi) from  Indonesia in the morning of Saturday, Jul 10, 2021 at 8.43 am local time (Asia/Makassar GMT +8). The quake had a very shallow depth of 23 km (14 mi) and was not felt (or at least not reported so).

Very strong mag. 6.2 Earthquake - Molucca Sea, 260 km northeast of Manado, North Sulawesi, Indonesia, on Saturday, Jul 10, 2021, at 08:43 am (Makassar time) Very strong mag. 6.2 Earthquake - Molucca Sea, 260 km northeast of Manado, North Sulawesi, Indonesia, on Saturday, Jul 10, 2021, at 08:43 am (Makassar time)

Very strong magnitude 6.2 earthquake at 23 km depth

10 Jul 00:51 UTC: First to report: GFZ after 7 minutes.
10 Jul 00:52: Magnitude recalculated from 5.9 to 5.8. Epicenter location corrected by 12 km (7.5 mi) towards WNW.
10 Jul 00:55: Now using data updates from BMKG

Earthquake details

Date & timeJul 10, 2021 00:43:57 UTC
Local time at epicenterSaturday, Jul 10, 2021, at 08:43 am (Asia/Makassar GMT +8)
StatusPreliminary (automatic detection)
Magnitude6.2
Depth23.0 km
Epicenter latitude / longitude2.99°N / 126.64°E Molucca Sea, Indonesia
Seismic antipode2.99°S / 53.36°W Brazil
Shaking intensityStrong shaking near epicenter
Felt0 reports
Primary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearest volcanoBanua Wuhu (118 km / 73 mi)
Weather at epicenter at time of quakeOvercast Clouds 28.6°C (84 F), humidity: 75%, wind: 5 m/s (9 kts) from SSW
Estimated seismic energy released1.3 x 1014 joules (35 gigawatt hours, equivalent to 30089 tons of TNT or 1.9 atomic bombs!) | about seismic energy
Interactive map
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Nearby places

The closest larger town where the quake might have been felt is Tobelo, a town with 10,000 inhabitants in Indonesia, in 207 km (129 mi) distance southeast of the epicenter. People likely experienced light shaking there.
The following table shows some of the places that might have been affected (or not) by the shaking.
Distance Place Max. shaking intensity(*) Region Country
207 km (129 mi)
SE of epicenter
Tobelo
(pop: 10,000)
IV: Light
North Maluku
235 km (146 mi)
SW of epicenter
Bitung
(pop: 137,400)
IV: Light
North Sulawesi
258 km (160 mi)
S of epicenter
Ternate
(pop: 101,700)
IV: Light
North Maluku
260 km (162 mi)
SW of epicenter
Manado
(pop: 451,900)
IV: Light
North Sulawesi
268 km (167 mi)
SW of epicenter
Tondano
(pop: 33,300)
IV: Light
North Sulawesi
271 km (168 mi)
SE of epicenter
Sofifi
(pop: 36,200)
IV: Light
North Maluku
276 km (172 mi)
SW of epicenter
Tomohon
(pop: 27,600)
IV: Light
North Sulawesi
384 km (238 mi)
NW of epicenter
General Santos City
(pop: 679,600)
III: Weak
Province of South Cotabato, Soccsksargen
438 km (272 mi)
NW of epicenter
Koronadal
(pop: 125,500)
III: Weak
Province of South Cotabato, Soccsksargen
482 km (300 mi)
SW of epicenter
Gorontalo
(pop: 144,200)
III: Weak
Gorontalo
Notes:
(*) Shaking intensity according to the Modified Mercalli Intensity Scale (MMI) and estimated using seismic models.

User-reports for this quake (1)

We received 1 report for this quake.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Translate
Singapore / not felt

What is Intensity and the Mercalli Intensity Scale?


The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.
Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.
Read more about the MMI scale!

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
2021-07-10
Epicenter Agency
6.2 23 km
14 mi
00:43:57 Indonesia: Northern Molucca Sea BMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
6.1 80 km
50 mi
00:43:59 Indonesia: MOLUCCA SEA
15 km (9.4 mi) epicenter difference with BMKG
EMSC (European-Mediterranean Seismological Centre)
6.1 45 km
28 mi
00:43:56 Indonesia: Molucca Sea
17 km (10.6 mi) epicenter difference with BMKG
USGS (United States Geological Survey)
6.2 26 km
16 mi
00:43:53 Talaud Islands, Indonesia
15 km (9.4 mi) epicenter difference with BMKG
GFZ (German Research Centre for Geosciences)
5.7 10 km
6.2 mi
(*)
00:43:52 Indonesia: Near Davao
42 km (26 mi) epicenter difference with BMKG
RENASS (Réseau National de Surveillance Sismique (RéNaSS))
6.2 73 km
45 mi
00:43:58 Indonesia [Sea]
10.7 km (6.6 mi) epicenter difference with BMKG
INGV (Istituto Nazionale di Geofisica e Vulcanologia)
6.1 64 km
39 mi
00:43:57 Indonesia: Northern Molucca Sea
13 km (8.4 mi) epicenter difference with BMKG
GeoAu (Geoscience Australia )
6.2 64 km
40 mi
00:43:00 Indonesia: 347 Km S 23° E of Sarangani (Davao Occidental)
52 km (32 mi) epicenter difference with BMKG
PHIVOLCS (Philippine Institute of Volcanology and Seismology)
Notes:
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.

Seismograms

Seismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 469 km / 291 mi | Show on map | Station Info
Seismic station Davao, Philippines: 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: 0.1-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

39 aftershocks for this quake

For this strong earthquake, 39 aftershocks have been detected so far. The strongest was a magnitude 5.8 quake that hit 7 minutes after the mainshock in 4.7 km (2.9 mi) distance, in 261 km northeast of Manado, North Sulawesi, Indonesia, on Saturday, Jul 10, 2021 on 08:51 am (Makassar local time GMT +8).
The most recent aftershock occurred 3 years ago 265 km northeast of Manado, North Sulawesi, Indonesia, and had a magnitude of 4.4.

What are aftershocks?


Larger earthquakes (above magnitude 5 or so) such as this one are usually followed by smaller ones known as aftershocks that occur in the same area during the days, weeks, months or even years after the main shock.
[More info]

What about this quake?


Based on its magnitude, the fault that was active during the quake likely ruptured beneath a surface of approx. 158 km2 (=61 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 22 km (14 mi).
[More info]


Recorded aftershocks, latest first (39 quakes)

Date and Time GMTMag
Depth
DistanceRegionDetails
Sep 18, 2021 10:49 pm (Makassar)
2 years ago
10 weeks after main shock
4.4

10 km
5.6 km (3.5 mi)
E of main shock
265 km NE of Manado, North Sulawesi, IndonesiaMore
Sep 14, 2021 09:32 pm (GMT +8)
2 years ago
10 weeks after main shock
3.0

10 km
14 km (8.4 mi)
SE of main shock
259 km NE of Manado, North Sulawesi, IndonesiaMore
Aug 14, 2021 05:19 am (GMT +8)
3 years ago
5 weeks after main shock
3.5

1 km
13 km (8.3 mi)
SE of main shock
266 km NE of Manado, North Sulawesi, IndonesiaMore
Aug 6, 2021 08:07 am (Makassar)
3 years ago
4 weeks after main shock
3.9

10 km
7.5 km (4.6 mi)
SE of main shock
259 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 28, 2021 08:30 pm (GMT +8)
3 years ago
3 weeks after main shock
3.3

31 km
5.7 km (3.5 mi)
S of main shock
231 km NE of Bitung, North Sulawesi, IndonesiaMore
Jul 24, 2021 10:44 pm (GMT +8)
3 years ago
2 weeks after main shock
3.4

113 km
20 km (13 mi)
SW of main shock
241 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 24, 2021 09:07 pm (Makassar)
3 years ago
2 weeks after main shock
5.4

58 km
4.6 km (2.8 mi)
E of main shock
263 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 15, 2021 09:00 pm (Makassar)
3 years ago
6 days after main shock
4.7

10 km
27 km (17 mi)
E of main shock
282 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 15, 2021 09:00 pm (Makassar)
3 years ago
6 days after main shock
3.8

51 km
18 km (11 mi)
E of main shock
271 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 14, 2021 12:52 am (GMT +8)
3 years ago
4 days after main shock
3.1

10 km
9.4 km (5.9 mi)
SE of main shock
261 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 12, 2021 03:16 am (GMT +8)
3 years ago
1 day 19 hours after main shock
3.6

32 km
4.7 km (2.9 mi)
NW of main shock
260 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 12, 2021 12:07 am (Makassar)
3 years ago
1 day 15 hours after main shock
4.3

10 km
9 km (5.6 mi)
NE of main shock
269 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 11, 2021 10:36 am (GMT +8)
3 years ago
1 day 2 hours after main shock
3.2

10 km
9.2 km (5.7 mi)
S of main shock
256 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 11, 2021 10:13 am (GMT +8)
3 years ago
1 day 1 hours after main shock
3.6

10 km
10.5 km (6.5 mi)
E of main shock
266 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 06:06 pm (Makassar)
3 years ago
9 hours after main shock
4.8

60 km
12 km (7.7 mi)
SW of main shock
249 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 06:04 pm (Makassar)
3 years ago
9 hours after main shock
5.0

10 km
13 km (8.3 mi)
E of main shock
271 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 06:04 pm (GMT +8)
3 years ago
9 hours after main shock
3.5

1 km
23 km (14 mi)
NW of main shock
257 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 05:52 pm (GMT +8)
3 years ago
9 hours after main shock
3.5

10 km
7.9 km (4.9 mi)
E of main shock
266 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 05:03 pm (GMT +8)
3 years ago
8 hours after main shock
3.6

28 km
6.8 km (4.2 mi)
E of main shock
266 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 07:58 am (universal)
3 years ago
7 hours after main shock
3.5

10 km
7.1 km (4.4 mi)
SE of main shock
234 km NE of Bitung, North Sulawesi, IndonesiaMore
Jul 10, 2021 03:25 pm (Makassar)
3 years ago
7 hours after main shock
3.8

10 km
1.6 km (1 mi)
NE of main shock
262 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 03:09 pm (GMT +8)
3 years ago
6 hours after main shock
2.8

10 km
4.6 km (2.8 mi)
S of main shock
258 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 02:26 pm (GMT +8)
3 years ago
6 hours after main shock
3.3

12 km
5 km (3.1 mi)
SE of main shock
233 km NE of Bitung, North Sulawesi, IndonesiaMore
Jul 10, 2021 02:23 pm (GMT +8)
3 years ago
6 hours after main shock
3.4

32 km
7 km (4.4 mi)
E of main shock
267 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 01:47 pm (GMT +8)
3 years ago
5 hours after main shock
3.5

53 km
6 km (3.7 mi)
E of main shock
263 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 01:35 pm (GMT +8)
3 years ago
5 hours after main shock
3.4

51 km
6.5 km (4 mi)
NE of main shock
267 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 11:30 am (Makassar)
3 years ago
2 hours and 47 minutes after main shock
4.5

12 km
6 km (3.7 mi)
S of main shock
258 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 11:00 am (GMT +8)
3 years ago
2 hours and 17 minutes after main shock
4.0

66 km
17 km (10.5 mi)
S of main shock
248 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 10:33 am (Makassar)
3 years ago
1 hour and 50 minutes after main shock
4.6

69 km
9.7 km (6 mi)
S of main shock
255 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 10:30 am (Makassar)
3 years ago
1 hour and 47 minutes after main shock
4.9

10 km
17 km (10.7 mi)
E of main shock
271 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 10:26 am (Makassar)
3 years ago
1 hour and 42 minutes after main shock
4.5

65 km
20 km (13 mi)
S of main shock
247 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 10:20 am (Makassar)
3 years ago
1 hour and 36 minutes after main shock
4.4

10 km
11 km (7 mi)
E of main shock
268 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 09:24 am (GMT +8)
3 years ago
40 minutes after main shock
3.6

10 km
11 km (6.9 mi)
E of main shock
270 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 09:19 am (GMT +8)
3 years ago
35 minutes after main shock
4.2

69 km
16 km (10.1 mi)
S of main shock
247 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 09:18 am (Makassar)
3 years ago
34 minutes after main shock
4.1

10 km
13 km (7.9 mi)
NE of main shock
273 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 09:14 am (GMT +8)
3 years ago
30 minutes after main shock
3.6

10 km
12 km (7.2 mi)
E of main shock
267 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 09:10 am (Makassar)
3 years ago
27 minutes after main shock
4.0

11 km
4 km (2.5 mi)
NE of main shock
264 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 08:58 am (Makassar)
3 years ago
14 minutes after main shock
5.2

35 km
2.5 km (1.5 mi)
NE of main shock
263 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 08:51 am (Makassar)
3 years ago
7 minutes after main shock
5.8

27 km
4.7 km (2.9 mi)
SE of main shock
261 km NE of Manado, North Sulawesi, IndonesiaMore
Jul 10, 2021 08:43 am (Makassar)
3 years ago
6.2

23 km
0 km - This quakeMolucca Sea, 260 km NE of Manado, North Sulawesi, Indonesia
Main Shock (this quake)
More
Show all

Map of aftershocks

Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 1,700 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 7 or higher: 0.03 quakes per year (or 1 quake every 31.3 years)
  • Mag. 6 or higher: 0.51 quakes per year (or 1 quake every 2 years)
  • Mag. 5 or higher: 10.4 quakes per year
  • Mag. 4 or higher: 50 quakes per year
  • Mag. 3 or higher: 137 quakes per year (or 11.4 quakes per month)
  • Mag. 2 or higher: 143 quakes per year (or 11.9 quakes per month)
The area where this quake occurred has a very high level of seismic activity. It has had at least 4 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 30 to 35 years.

Number of quakes per year

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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Map to embed or share

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