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Moderate mag. 4.5 earthquake - Indian Ocean, 106 km west of Sinabang, Kabupaten Simeulue, Aceh, Indonesia, on Thursday, Sep 23, 2021 at 12:30 am (GMT +7)

Moderate mag. 4.5 earthquake - Indian Ocean, 106 km west of Sinabang, Kabupaten Simeulue, Aceh, Indonesia, on Thursday, Sep 23, 2021 at 12:30 am (GMT +7) Moderate mag. 4.5 earthquake - Indian Ocean, 106 km west of Sinabang, Kabupaten Simeulue, Aceh, Indonesia, on Thursday, Sep 23, 2021 at 12:30 am (GMT +7)

Moderate magnitude 4.5 earthquake at 10 km depth

22 Sep 17:35 UTC: First to report: BMKG after 5 minutes.
22 Sep 17:40: Hypocenter depth recalculated from 96.0 to 10.0 km (from 60 to 6.2 mi). Epicenter location corrected by 12 km (7.6 mi) towards E.
22 Sep 17:45: Magnitude recalculated from 4.4 to 4.5. Epicenter location corrected by 4.6 km (2.8 mi) towards WSW.
Update Wed, 22 Sep 2021, 17:45

Moderate earthquake of magnitude 4.4 just reported 102 km northwest of Sinabang, Indonesia

4.4 quake 23 Sep 12:30 am (GMT +7)
4.4 quake 23 Sep 12:30 am (GMT +7)
A shallow magnitude 4.4 earthquake was reported after midnight near Sinabang, Kabupaten Simeulue, Aceh, Indonesia.
According to Indonesia's Meteorology, Climatology, and Geophysical Agency, the quake hit on Thursday, September 23rd, 2021, at 12:30 am local time at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 4.4 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Sinabang (pop. 15,000) located 102 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 details

Date & timeSep 22, 2021 17:30:10 UTC
Local time at epicenterThursday, Sep 23, 2021 at 12:30 am (GMT +7)
Depth10.0 km
Epicenter latitude / longitude2.72°N / 95.46°E (Indian Ocean, Indonesia)
Antipode2.72°S / 84.54°W
Shaking intensityModerate shaking near epicenter
Felt0 reports
Primary data sourceBMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearby towns and cities106 km (66 mi) WNW of Sinabang (Kabupaten Simeulue) (pop: 15,000) | Show on map | Quakes nearby
175 km (109 mi) SSW of Meulaboh (Kabupaten Aceh Barat) (pop: 35,100) | Show on map | Quakes nearby
263 km (164 mi) W of Singkil (pop: 46,800) | Show on map | Quakes nearby
292 km (182 mi) SSW of Reuleuet (pop: 40,400) | Show on map | Quakes nearby
309 km (192 mi) SSW of Bireun (Kabupaten Bireuen) (pop: 25,800) | Show on map | Quakes nearby
332 km (206 mi) SW of Lhokseumawe (pop: 89,000) | Show on map | Quakes nearby
340 km (211 mi) SW of Langsa (pop: 54,500) | Show on map | Quakes nearby
Weather at epicenter at time of quakeBroken Clouds 28.1°C (83 F), humidity: 74%, wind: 3 m/s (6 kts) from S
Estimated seismic energy released3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) | 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.
4.510 kmIndonesia: Off West Coast of Northern SumatraBMKG
4.478 kmIndonesia: Off West Coast of Northern SumatraGFZ
4.510 km98 Km WNW of Sinabang, IndonesiaUSGS

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.

Earlier earthquakes in the same area

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