Strong mag. 6.6 earthquake - Southern Sumatra, Indonesia on Tuesday, 18 August 2020 - information

Very strong mag. 6.6 earthquake - Indian Ocean, 109 km west of Benkulu, Bengkulu, Indonesia, on Tuesday, August 18, 2020 at 22:29 (GMT)

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Very strong mag. 6.6 earthquake - Indian Ocean, 109 km west of Benkulu, Bengkulu, Indonesia, on Tuesday, August 18, 2020 at 22:29 (GMT)

Very strong magnitude 6.6 earthquake at 40 km depth

18 Aug 22:37 UTC: First to report: GFZ after 8 minutes.
Aug 18 22:39: Magnitude recalculated from 6.8 to 7.1.
Hypocenter depth recalculated from 58.0 to 10.0 km.
Aug 18 22:41: Magnitude recalculated from 7.1 to 7.0.
Aug 18 23:05: Magnitude recalculated from 7.0 to 6.6.
Hypocenter depth recalculated from 10.0 to 40.0 km.
Update Tue, 18 Aug 2020, 23:34
Today's quakes occurred in almost the same area as the massive magnitude 8.4 quake, which had occurred on 12 Sep 2007. In fact, they likely still represent late aftershocks of it.
Update Tue, 18 Aug 2020, 23:23
Magnitude recalculated to 6.6
It appears that the quake was "only" a 6.6 event. This is significantly weaker than a magnitude 7.0, after more detailed calculations have been possible in the 50 minutes since the quake occurred.
While the difference between 6.6 and 7.0 might seem small, due to the logarithmic scale, a magnitude 7 is 4 times stronger than a magnitude 6.6 quake, so the difference is very significant.
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Earthquake data

Date & time: Aug 18, 2020 22:29:27 UTC -
Magnitude: 6.6
Depth: 40.0 km
Epicenter latitude / longitude: 4.12°S / 101.34°E (Indian Ocean, Indonesia)
Antipode: 4.12°N / 78.66°W
Nearest volcano: Kaba (171 km / 106 mi)
Nearby towns and cities:
109 km (68 mi) WSW of Benkulu (pop: 309,700) --> See nearby quakes!
150 km (93 mi) WSW of Curup (pop: 46,200) --> See nearby quakes!
192 km (119 mi) WSW of Lubuklinggau (pop: 148,200) --> See nearby quakes!
212 km (132 mi) W of Pagar Alam (pop: 70,400) --> See nearby quakes!
230 km (143 mi) S of Sungai Penuh (pop: 95,900) --> See nearby quakes!
247 km (154 mi) W of Lahat (pop: 65,900) --> See nearby quakes!
274 km (170 mi) W of Tanjungagung (pop: 53,100) --> See nearby quakes!
369 km (229 mi) SSE of Padang (pop: 840,400) --> See nearby quakes!
401 km (249 mi) WSW of Palembang (pop: 1,441,500) --> See nearby quakes!
653 km (406 mi) WNW of Jakarta (pop: 8,540,100) --> See nearby quakes!
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 atomic bombs!) More info
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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
6.640 kmSouthern Sumatra, IndonesiaGFZ
6.810 kmSouthern Sumatra, IndonesiaEMSC
7.123 kmSouthwest of Sumatra, IndonesiaBMKG
6.844 kmSouthern Sumatra, IndonesiaGeoAu
7.193 kmSouthern Sumatera, Indonesia [Sea: Indonesia]INGV
6.926 km126 km WSW of Bengkulu, IndonesiaUSGS

User reports for this quake (37)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Jalan Berseh, Singapore (665.3 km NNE of epicenter) [Map] / Weak shaking (MMI III) : Was sitting on the floor when I felt my body swaying. I thought I was just feeling dizzy but then realised that the chandelier in my house was swaying too. My room door and hanged clock was also swaying. Felt both 6.8 and 6.9 magnitude Indonesia earthquak | 6 users found this interesting.  
Cileungsi, Bogor, Jawa Barat (674.8 km ESE of epicenter) [Map] / Very weak shaking (MMI II) : I felt like something just shaking me. I was in sleep at the time. I just wake up when I feel something shaking me a little bit (reported through our app)  
Singapore, SG.01 (667.8 km NNE of epicenter) [Map] / Very weak shaking (MMI II) : Very weak and faint sway. Felt on Seating position. Level 12 | 2 users found this interesting.  
Male', Maldives (3226.8 km WNW of epicenter) [Map] / Very weak shaking (MMI II) : Felt the bed shaking while resting. Was not sure it was an earthquake until I saw the news | One user found this interesting.  
Bandon, West Java (763.3 km ESE of epicenter) [Map] / not felt
49 km of Baturaja, South Sumatra (349.8 km E of epicenter) [Map] / not felt
Caranan, Province of Camarines Sur, Bicol (3093.5 km NE of epicenter) [Map] / Weak shaking (MMI III) : Light shaking and no damage (reported through our app)  
Jakarta (666.6 km ESE of epicenter) [Map] / not felt (reported through our app)
Bekasi (666.6 km ESE of epicenter) [Map] / not felt (reported through our app)
Jakarta (656.2 km ESE of epicenter) [Map] / not felt
Sungai Penuh, Jambi (229.9 km N of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Pelalawan Kerinci (509.4 km N of epicenter) [Map] / not felt : did not fell either earthquake. I am glad it was in 2 steps and not 1.  
Tasman Sea (8023.1 km SE of epicenter) [Map] / Very weak shaking (MMI II)
Marina Del Rey, CA, USA (14737.3 km NE of epicenter) [Map] / Very weak shaking (MMI II) : I felt mild shaking as I was trying to take a nap.  
unspecified (13142.5 km NNE of epicenter) [Map] / not felt
near Ranau, Sabah (2031.3 km NE of epicenter) [Map] / not felt (reported through our app)
Montesano (13601.8 km NE of epicenter) [Map] / not felt
Benkulu (111.5 km ENE of epicenter) [Map] / Light shaking (MMI IV)
Padang, West Sumatra (369.5 km NNW of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Kuta, Kabupaten Badung, Bali (1611.8 km ESE of epicenter) [Map] / not felt
Singapore / Light shaking (MMI IV) : on the 13th floor of an apartment building, near Southern coast. Felt whole building swaying for a good 10seconds | 3 users found this interesting.  
Singapore / Light shaking (MMI IV) : Fans moved quite a bit. I felt myself shake in my chair. | One user found this interesting.  
Maldives / Very weak shaking (MMI II) : Bed was shaking | One user found this interesting.  
The body shop / Violent shaking (MMI IX) : ££££££  
Tangerang / not felt
Longbeach / not felt
Singapore / Weak shaking (MMI III)
Kuta lombok / not felt
Bogor / not felt
Madiun, East Java, Indonesia / not felt : My location is about 1,350 km ESE of the quake. I did not feel it, though I was asleep at the time.  
Singapore / Light shaking (MMI IV)
Singapore / not felt
Singapore / Very weak shaking (MMI II)
Wasilla Alaska / not felt
Rejang lebong, bengkulu / Strong shaking (MMI VI)
Singapore / not felt
(Indonesia, 374 km NW of epicenter) : Its like swinging for like half minute | One user found this interesting. (reported through EMSC)  
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Aftershocks

[More info]

Recorded aftershocks, latest first (67 quakes)

  • 05 Feb 2021 09:07 UTC
    | M 4.9 |
    48 km (29.8 mi) depth
    |
    104 km (65 mi) distance
    | BMKG | Details
  • 01 Feb 2021 09:09 UTC
    | M 3.3 |
    54 km (33.6 mi) depth
    |
    116 km (72 mi) distance
    | BMKG | Details
  • 23 Jan 2021 14:06 UTC
    | M 3.8 |
    54 km (33.6 mi) depth
    |
    106 km (66 mi) distance
    | BMKG | Details
  • 13 Jan 2021 06:18 UTC
    | M 4.7 |
    27 km (16.8 mi) depth
    |
    92 km (57 mi) distance
    | BMKG | Details
  • 03 Jan 2021 21:56 UTC
    | M 3.1 |
    13 km (8.1 mi) depth
    |
    32 km (20 mi) distance
    | BMKG | Details
  • 31 Dec 2020 21:05 UTC
    | M 2.6 |
    60 km (37.3 mi) depth
    |
    110 km (68 mi) distance
    | BMKG | Details
  • 25 Dec 2020 23:06 UTC
    | M 3.2 |
    47 km (29.2 mi) depth
    |
    114 km (71 mi) distance
    | BMKG | Details
  • 23 Dec 2020 22:27 UTC
    | M 4.1 |
    10 km (6.2 mi) depth
    |
    47 km (29 mi) distance
    | BMKG | Details
  • 23 Dec 2020 22:19 UTC
    | M 4.9 |
    24 km (14.9 mi) depth
    |
    50 km (31 mi) distance
    | BMKG | Details
  • 22 Dec 2020 14:00 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Details
  • 21 Dec 2020 06:32 UTC
    | M 3.6 |
    17 km (10.6 mi) depth
    |
    68 km (42 mi) distance
    | BMKG | Details
  • 18 Dec 2020 05:20 UTC
    | M 3.7 |
    18 km (11.2 mi) depth
    |
    121 km (75 mi) distance
    | BMKG | Details
  • 14 Dec 2020 08:12 UTC
    | M 4.1 |
    10 km (6.2 mi) depth
    |
    47 km (29 mi) distance
    | BMKG | Details
  • 05 Dec 2020 02:23 UTC
    | M 3.1 |
    10 km (6.2 mi) depth
    |
    88 km (55 mi) distance
    | BMKG | Details
  • 04 Dec 2020 21:52 UTC
    | M 4.3 |
    25 km (15.5 mi) depth
    |
    107 km (66 mi) distance
    | BMKG | Details
  • 04 Dec 2020 11:01 UTC
    | M 3.4 |
    20 km (12.4 mi) depth
    |
    103 km (64 mi) distance
    | BMKG | Details
  • Show all

Earlier earthquakes in the same area

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