Information on the earthquake: moderate mag. 4.3 earthquake
Moderate magnitude earthquake 4.3 to 22 km deep
22 Aug 09:05 UTC: First to report: BMKG after 5 minutes.
22 Aug 14:45: Magnitude recalculated from 4.6 to 4.3. Depth of the hypocenter recalculated from 21.0 to 22.0 km (13 to 13.7 mi). Epicenter location corrected 1.6 km (1 mi) NE.
Updated Sun Aug 22, 2021, 09:09 AM
Moderate magnitude 4.6 earthquake just reported 41 km south of Singkil, Indonesia
4.6 earthquake 22 August 15:59 (GMT +7)
Our monitoring service identified a second report from the Euro-Mediterranean Seismological Center (EMSC) which also listed the 4.6 magnitude earthquake.
Based on preliminary seismic data, the quake should not have caused significant damage, but was likely felt by many as a slight vibration in the epicenter area.
Weak tremors could have been felt in Singkil (46,800 inhabitants) located 41 km from the epicenter.
VolcanoDiscovery will automatically update the magnitude and depth if these change and follow up if other significant earthquake news becomes available. If you are in the region, please share your experience with us through our reporting mechanism, online or via our mobile application. This will help us provide more first-hand updates to anyone in the world who is interested in learning more about this earthquake.
If you were or still are in this area during the earthquake help others with your comments and file a quick report here.
I felt this tremor
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Date and Time: Aug 22, 2021 08:59:47 UTC –
Local time at epicenter: Sunday August 22, 2021 3:59 p.m. (GMT +7)
Depth: 22.0 km
Latitude / longitude of epicenter: 1.93 Â° N / 97.76 Â° Eâ (Indian Ocean, Indonesia)
Antipode: 1.93 Â° S / 82.24 Â° Wâ
Nearest volcano: Toba (129 km / 80 mi)
Nearby towns and villages:
40 km (25 mi) south of Singkil (pop: 46,800) -> Observe the earthquakes nearby!
115 km (72 mi) west of Sibolga (pop: 79,700) -> See nearby earthquakes!
153 km (95 mi) SSO of Kabanjahe (pop: 57,200) -> See nearby earthquakes!
179 km (111 mi) WNW of Padangsidempuan (pop: 100,600) -> See nearby earthquakes!
185 km (115 mi) southwest of Pematangsiantar (pop: 209,600) -> Observe the earthquakes nearby!
202 km (126 mi) SSO of Binjai (pop: 228,800) -> Observe the earthquakes nearby!
206 km (128 mi) SSO of Sunggal (pop: 157,900) -> Observe the earthquakes nearby!
210 km (130 mi) SSO of Medane (pop: 1,751,000) -> See nearby earthquakes!
431 km (268 mi) northwest of Padang (pop: 840 400) -> See earthquakes nearby!
457 km (284 mi) WW of Kuala Lumpur, Malaysia) (pop: 1,454,000) -> See nearby earthquakes!
91 km (57 mi) north of Nias Island (pop: 756,300) -> See nearby earthquakes!
Clouds covered 27.8 Â° C (82 F), humidity: 74%, wind: 6 m / s (12 kts) from WSW
Main data source: BMKG (Meteorological, Climatological and Geophysical Agency of Indonesia)
Estimated energy released: 1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tonnes of TNT) Find out more
Also if you did NOT feel the tremor even if you were in the area, please report it! Your contribution is also valuable to earthquake science and seismic risk analysis and mitigation efforts. You can use your device’s location or the map to show where you were during the earthquake. Thank you!
Data for the same earthquake reported by different agencies
Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the seismic parameters to be calculated with near optimum accuracy.
|4.3||22 km||North Sumatra, Indonesia||BMKG|
|4.5||60 km||NIAS REGION, INDONESIA||EMSC|
|4.5||57 km||44 km on the south of Singkil, Indonesia||USGS|
|4.6||61 km||North Sumatra, Indonesia||GFZ|
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