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Strong mag. 6.1 earthquake - Celebes Sea, Indonesia, on Saturday, 10 April 2021 at 09:30 (GMT) - information

Strong mag. 6.1 earthquake - Celebes Sea, Indonesia, on 10 Apr 5:30 pm (GMT +8)

Strong mag. 6.1 earthquake - Celebes Sea, Indonesia, on 10 Apr 5:30 pm (GMT +8) Strong mag. 6.1 earthquake - Celebes Sea, Indonesia, on 10 Apr 5:30 pm (GMT +8)

Strong magnitude 6.1 earthquake at 307 km depth

10 Apr 09:40 UTC: First to report: GFZ after 9 minutes.
10 Apr 09:37: Magnitude recalculated from 5.9 to 6.0. Epicenter location corrected by 1.1 km (0.7 mi) towards S.
... [show all] ...
10 Apr 17:45: Hypocenter depth recalculated from 301.0 to 307.0 km (from 187 to 191 mi). Epicenter location corrected by 5.6 km (3.5 mi) towards SW.

Earthquake details

Date & timeApr 10, 2021 09:30:44 UTC
Local time at epicenter10 Apr 5:30 pm (GMT +8)
StatusConfirmed
Magnitude6.1
Depth307.0 km
Epicenter latitude / longitude4.18°N / 124.69°E (Celebes Sea, Indonesia)
Antipode4.18°S / 55.31°W
Shaking intensityVery weak shaking
Felt7 reports
Primary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearest volcanoUnnamed (60 km / 37 mi)
Nearby towns and cities192 km (119 mi) SSW of Glan (Sarangani, Philippines) (pop: 24,300) | Show on map | Quakes nearby
221 km (138 mi) SSW of General Santos City (Philippines) (pop: 679,600) | Show on map | Quakes nearby
231 km (143 mi) S of Polomolok (Philippines) (pop: 64,000) | Show on map | Quakes nearby
259 km (161 mi) S of Koronadal (Philippines) (pop: 125,500) | Show on map | Quakes nearby
301 km (187 mi) N of Manado (pop: 451,900) | Show on map | Quakes nearby
308 km (191 mi) N of Bitung (pop: 137,400) | Show on map | Quakes nearby
319 km (198 mi) N of Tomohon (pop: 27,600) | Show on map | Quakes nearby
321 km (199 mi) N of Tondano (Kabupaten Minahasa) (pop: 33,300) | Show on map | Quakes nearby
481 km (299 mi) NW of Ternate (pop: 101,700) | Show on map | Quakes nearby
498 km (310 mi) NW of Sofifi (Kota Tidore Kepulauan) (pop: 36,200) | Show on map | Quakes nearby
446 km (277 mi) ESE of Jolo Island (pop: 530,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeBroken Clouds 29°C (84 F), humidity: 65%, wind: 1 m/s (1 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
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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
6.1307 kmCelebes Sea, IndonesiaBMKG
6.1320 kmCELEBES SEA, IndonesiaEMSC
6.0317 kmCelebes Sea, IndonesiaGFZ
6.1326 km170 Km S 21° W of Sarangani (Davao Occidental), IndonesiaPHIVOLCS
5.8324 kmNear Davao, IndonesiaRENASS
6.0319 kmIndonesia [Sea]INGV
6.1311 km168 Km SSW of Sarangani, Philippines, IndonesiaUSGS
6.0323 kmCelebes Sea, IndonesiaGeoAu
6.0300 km苏拉威西海, IndonesiaCEIC

Seismograms

Seismic station: Davao, Philippines (DAV/IU network) | Distance from quake: 336 km / 209 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. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (12)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Surabaya / not felt : but my parents did, they were working and then they felt it, but it was relatively small so it didn't do much | One user found this interesting.  
near Ranau, Sabah (921 km WNW of epicenter) [Map] / not felt : not felt | One user found this interesting. (reported through our app)  
Bacan, Amasing Kota (617.7 km SSE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging : gempa | One user found this interesting. (reported through our app)  
Canggu bali (1774.4 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 30-60 s
Canggu bali (1774.4 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 30-60 s
Driyorejo, East Java (1846 km SW of epicenter) [Map] / Weak shaking (MMI III) / 5-10 s (reported through our app)
Balibago, Province of Pampanga, Central Luzon (1302.1 km NNW of epicenter) [Map] / not felt (reported through our app)
Batuganding Indonesia (123.5 km N of epicenter) [Map] / Weak shaking (MMI III) : Yes I feel earquak Batuganding Indonesia  
Davao City (334.5 km NNE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s (reported through our app)
Malang, East Java (1901.7 km SW of epicenter) [Map] / not felt (reported through our app)
Davao City / not felt
Davao Ciry / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s

Aftershocks

[More info]

Recorded aftershocks, latest first (4 quakes)

Date and timeMag
Depth
LocationDetails
Jul 20, 2021 09:47
1 year 20 weeks ago
3.5

14 km
Celebes Sea, Indonesia, 188 km SW of General Santos City, PhilippinesMore
Jul 8, 2021 20:36
1 year 22 weeks ago
4.0

579 km
Celebes Sea, Indonesia, 202 km SW of General Santos City, PhilippinesMore
Jul 6, 2021 17:13
1 year 22 weeks ago
3.8

316 km
Celebes Sea, Indonesia, 209 km S of General Santos City, PhilippinesMore
Apr 18, 2021 19:33
1 year 34 weeks ago
4.1

333 km
Celebes Sea, 252 km N of Manado, North Sulawesi, IndonesiaMore

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