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

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

Strong mag. 6.6 earthquake  - Southern Sumatra, Indonesia on Tuesday, 18 August 2020
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.
Read all
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Earthquake data:

Date & time: Tuesday, 18 August 2020 22:29 UTC
Magnitude: 6.6
Depth: 40.0 km
Epicenter latitude / longitude: 4.12°S / 101.34°E (Indonesia)
Nearest volcano: Kaba (171 km / 106 mi)
Nearby towns and cities:
109 km (68 mi) SW of Bengkulu (pop: 309,700)
150 km (93 mi) SW of Curup (pop: 46,200)
192 km (119 mi) SW of Lubuklinggau (pop: 148,200)
653 km (406 mi) NW of Jakarta (pop: 8,540,100)
Primary data source: GFZ
Estimated released energy: 5 x 1014 joules (139 gigawatt hours, equivalent to 1.2 x 105 tons of TNT or 7.5 atomic bombs!) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
TimeMag. / DepthLocationSource
Tue, 18 Aug 22:29 UTCM 6.6 / 40 kmSouthern Sumatra, IndonesiaGFZ
Tue, 18 Aug 22:29 UTCM 6.8 / 10 kmSouthern Sumatra, IndonesiaEMSC
Tue, 18 Aug 22:29 UTCM 7.1 / 23 kmSouthwest of Sumatra, IndonesiaBMKG
Tue, 18 Aug 22:29 UTCM 6.8 / 44 kmSouthern Sumatra, IndonesiaGeoAu
Tue, 18 Aug 22:29 UTCM 7.1 / 93 kmSouthern Sumatera, Indonesia [Sea: Indonesia]INGV
Tue, 18 Aug 22:29 UTCM 6.9 / 26 km126 km WSW of Bengkulu, IndonesiaUSGS
Sun, 9 Sep 01:46 UTCM 7.0 / 40 kmSouthern Sumatra, IndonesiaGFZ
Tue, 18 Aug 22:29 UTCM 6.8 / 44 kmSouthern Sumatra, IndonesiaGeoAu

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (modified Mercalli) scale.
Contribute:
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 experience report!
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 earthquake, happened within minutes apart. | 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)
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.
763.3 km ESE of epicenter [Map] / not felt
349.8 km E of epicenter [Map] / not felt
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)
656.2 km ESE of epicenter [Map] / not felt
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.
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.
13142.5 km NNE of epicenter [Map] / not felt
2031.3 km NE of epicenter [Map] / not felt (reported through our app)
Montesano (13601.8 km NE of epicenter) [Map] / not felt
111.5 km ENE of epicenter [Map] / Light shaking (MMI IV)
369.5 km NNW of epicenter [Map] / Weak shaking (MMI III) (reported through our app)
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)

Aftershocks of the 6.6 quake: Southern Sumatra, Indonesia, 18 Aug 2020 22h29

Show info about this
List of recorded aftershocks, latest first (29 quakes):
  • 28 Sep 2020 01:17 UTC
    | M 4.3 |
    23 km (14.3 mi) depth
    |
    89 km (55 mi) distance
    | BMKG | Details
  • 27 Sep 2020 15:43 UTC
    | M 3.1 |
    23 km (14.3 mi) depth
    |
    115 km (72 mi) distance
    | BMKG | Details
  • 26 Sep 2020 08:37 UTC
    | M 3.6 |
    10 km (6.2 mi) depth
    |
    10 km (6 mi) distance
    | BMKG | Details
  • 25 Sep 2020 06:42 UTC
    | M 3.1 |
    19 km (11.8 mi) depth
    |
    116 km (72 mi) distance
    | BMKG | Details
  • 24 Sep 2020 10:11 UTC
    | M 3.1 |
    34 km (21.1 mi) depth
    |
    96 km (59 mi) distance
    | BMKG | Details
  • 21 Sep 2020 02:11 UTC
    | M 3.6 |
    14 km (8.7 mi) depth
    |
    35 km (21 mi) distance
    | BMKG | Details
  • 20 Sep 2020 02:59 UTC
    | M 4.2 |
    106 km (65.9 mi) depth
    |
    108 km (67 mi) distance
    | BMKG | Details
  • 16 Sep 2020 21:49 UTC
    | M 3.8 |
    10 km (6.2 mi) depth
    |
    99 km (61 mi) distance
    | BMKG | Details
  • 12 Sep 2020 03:09 UTC
    | M 3.5 |
    26 km (16.2 mi) depth
    |
    67 km (41 mi) distance
    | BMKG | Details
  • 29 Aug 2020 05:35 UTC
    | M 4.9 |
    10 km (6.2 mi) depth
    |
    52 km (32 mi) distance
    | BMKG | Details
  • 27 Aug 2020 22:49 UTC
    | M 3.4 |
    28 km (17.4 mi) depth
    |
    91 km (56 mi) distance
    | BMKG | Details
  • 26 Aug 2020 01:36 UTC
    | M 4.6 |
    10 km (6.2 mi) depth
    |
    37 km (23 mi) distance
    | BMKG | Details
  • 24 Aug 2020 11:45 UTC
    | M 4.2 |
    14 km (8.7 mi) depth
    |
    41 km (26 mi) distance
    | BMKG | Details
  • 24 Aug 2020 10:24 UTC
    | M 4.9 |
    25 km (15.5 mi) depth
    |
    40 km (25 mi) distance
    | GFZ | Details
  • 22 Aug 2020 19:42 UTC
    | M 3.8 |
    10 km (6.2 mi) depth
    |
    67 km (42 mi) distance
    | BMKG | Details
  • 22 Aug 2020 03:17 UTC
    | M 4.8 |
    42 km (26.1 mi) depth
    |
    26 km (16 mi) distance
    | BMKG | Details
  • Show all

Map of aftershocks

Significant earlier earthquakes in the same area since 1900

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

Map of earlier quakes

 

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