Moderate mag. 4.3 earthquake - Indian Ocean, 40 km south of Singkil, Aceh, Indonesia, on Sunday, Aug 22, 2021 3:59 pm (GMT +7) -

Moderate mag. 4.3 earthquake - Indian Ocean, 40 km south of Singkil, Aceh, Indonesia, on Sunday, Aug 22, 2021 3:59 pm (GMT +7)

Moderate magnitude 4.3 earthquake at 22 km depth

22 Aug 09:05 UTC: First to report: BMKG after 5 minutes.
22 Aug 14:45: Magnitude recalculated from 4.6 to 4.3. Hypocenter depth recalculated from 21.0 to 22.0 km (from 13 to 13.7 mi). Epicenter location corrected by 1.6 km (1 mi) towards NE.
Update Sun, 22 Aug 2021, 09:09
Moderate earthquake of magnitude 4.6 just reported 41 km south of Singkil, Indonesia
4.6 quake 22 Aug 3:59 pm (GMT +7)
4.6 quake 22 Aug 3:59 pm (GMT +7)
Indonesia's Meteorology, Climatology, and Geophysical Agency reported a magnitude 4.6 quake in Indonesia near Singkil, Aceh, only 9 minutes ago. The earthquake hit early afternoon on Sunday 22 August 2021 at 3:59 pm local time at a shallow depth of 21 km. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.6 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Singkil (pop. 46,800) located 41 km from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake data

Date & time: Aug 22, 2021 08:59:47 UTC -
Local time at epicenter: Sunday, Aug 22, 2021 3:59 pm (GMT +7)
Magnitude: 4.3
Depth: 22.0 km
Epicenter latitude / longitude: 1.93°N / 97.76°E (Indian Ocean, Indonesia)
Antipode: 1.93°S / 82.24°W
Nearest volcano: Toba (129 km / 80 mi)
Nearby towns and cities:
40 km (25 mi) S of Singkil (pop: 46,800) --> See nearby quakes!
115 km (72 mi) W of Sibolga (pop: 79,700) --> See nearby quakes!
153 km (95 mi) SSW of Kabanjahe (pop: 57,200) --> See nearby quakes!
163 km (102 mi) SSW of Berastagi (pop: 44,800) --> See nearby quakes!
179 km (111 mi) WNW of Padangsidempuan (pop: 100,600) --> See nearby quakes!
185 km (115 mi) SW of Pematangsiantar (pop: 209,600) --> See nearby quakes!
202 km (126 mi) SSW of Binjai (pop: 228,800) --> See nearby quakes!
206 km (128 mi) SSW of Sunggal (pop: 157,900) --> See nearby quakes!
210 km (130 mi) SSW of metan (pop: 1,751,000) --> See nearby quakes!
225 km (140 mi) SSW of Percut (pop: 311,100) --> See nearby quakes!
91 km (57 mi) N of Nias Island (pop: 756,300) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 27.8°C (82 F), humidity: 74%, wind: 6 m/s (12 kts) from WSW
Primary data source: BMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Estimated released energy: 1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) More info
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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!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic 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.
4.322 kmNorthern Sumatra, IndonesiaBMKG
4.557 km44 Km S of Singkil, IndonesiaUSGS
4.661 kmNorthern Sumatra, IndonesiaGFZ

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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