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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 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)

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 & time	Sep 22, 2021 17:30:10 UTC
Local time at epicenter	Thursday, Sep 23, 2021 at 12:30 am (GMT +7)
Status	Confirmed
Magnitude	4.5
Depth	10.0 km
Epicenter latitude / longitude	2.72°N / 95.46°E (Indian Ocean, Indonesia)
Antipode	2.72°S / 84.54°W
Shaking intensity	Moderate shaking near epicenter
Felt	0 reports
Primary data source	BMKG (Meteorological, Climatological, and Geophysical Agency of Indonesia)
Nearest volcano	###NEARESTVOLCANO2###
Nearby towns and cities	106 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 quake	Broken Clouds 28.1°C (83 F), humidity: 74%, wind: 3 m/s (6 kts) from S
Estimated seismic energy released	3.5 x 10¹¹ joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) \| about seismic energy

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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.	Depth	Location	Source
4.5	10 km	Indonesia: Off West Coast of Northern Sumatra	BMKG
4.5	30 km	SIMEULUE, INDONESIA	EMSC
4.4	78 km	Indonesia: Off West Coast of Northern Sumatra	GFZ
4.5	10 km	98 Km WNW of Sinabang, Indonesia	USGS

Most recent quakes Top 20 past 24 hrs Quakes in Indonesia

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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