Information on the earthquake: moderate mag. Earthquake 4.1 – Flores Sea, 31 km northwest of Sumbawa Besar, Indonesia, on Friday, September 17, 2021 at 12:09 am (GMT +8)
Moderate magnitude earthquake 4.1 to 10 km deep
16 Sep 04:15 PM UTC: First to report: BMKG after 6 minutes.
Sep 16 4:20 PM: Magnitude recalculated from 4.1 to 4.2. Epicenter location corrected 1.6 km (1 mi) to the SE.
Sep 16 4:25 PM: Magnitude recalculated from 4.2 to 4.1. Epicenter location corrected 1.1 km (0.7 mi) towards W.
Updated Thu Sep 16, 2021, 4:24 PM
Magnitude 4.2 earthquake strikes near Sumbawa Besar, ID.17 Sumbawa (undefined), West Nusa Tenggara, Indonesia
Earthquake 4.2 of September 17 at 12:09 am (GMT +8)
Just 15 minutes ago, a magnitude 4.2 earthquake struck near Sumbawa Besar, ID.17 Sumbawa (undefined), West Nusa Tenggara, Indonesia. The tremor was recorded after midnight on Friday, September 17, 2021, at 12:09 a.m. local time, at a shallow depth of 10 km below the surface.
The event was recorded by the Indonesian Meteorological, Climatological and Geophysical Agency, the first seismological agency to report it.
A second report was then published by the Euro-Mediterranean Seismological Center (EMSC), which classified it as a magnitude 4.1 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 Pototano (5,000 inhabitants) located 30 km from the epicenter and in Sumbawa Besar (52,700 inhabitants) 30 km away.
Other towns near the epicenter where the earthquake could have been felt as very weak tremors include Labuan Lombok (10,000 inhabitants) located 67 km from the epicenter and Labuan Lombok (10,000 inhabitants) 67 km away.
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Date and hour : Sep 16, 2021 16:09:04 UTC –
Local time at epicenter: Friday Sep 17, 2021 12:09 AM (GMT +8)
Depth: 10.0 km
Latitude / longitude of epicenter: 8.29 ° S / 117.23 ° E↗ (Flores Sea, Indonesia)
Antipode: 8.29 ° N / 62.77 ° W↗
Nearest volcano: Tambora (84 km / 52 mi)
Nearby towns and villages:
31 km (19 mi) northwest of Sumbawa Besar (pop: 52,700) -> Observe the earthquakes nearby!
31 km (19 mi) to WNW of Pototano (Kabupaten Sumbawa) (pop: 5,000) -> See nearby earthquakes!
66 km (41 mi) ENE of Labuan Lombok (Kabupaten Lombok Timur) (pop: 10,000) -> Watch the earthquakes nearby!
66 km (41 mi) ENE of Labuan Lombok (pop: 10,000) -> Watch the earthquakes nearby!
115 km (72 mi) ENE of Praya (Kabupaten Lombok Tengah) (pop: 35,200) -> Observe the earthquakes nearby!
127 km (79 mi) ENE of Mataram-Lombok (pop: 318,700) -> Watch the earthquakes nearby!
138 km (86 mi) west of Dompu (pop: 49,000) -> See nearby earthquakes!
166 km (103 mi) west of Bima (pop: 67,000) -> See earthquakes nearby!
225 km (140 mi) east of Denpasar (pop: 834 900) -> Observe the earthquakes nearby!
426 km (265 mi) southwest of Macassar (pop: 1,321,700) -> See earthquakes nearby!
99 km (61 mi) to WNW of Pulau Sumbawa Island (pop: 1,391,300) -> See nearby earthquakes!
108 km (67 mi) ENE of Lombok Island (pop: 3,311,000) -> See nearby earthquakes!
Scattered clouds 26.4 ° C (79 F), humidity: 80%, wind: 5 m / s (10 kts) from SE
Main data source: BMKG (Meteorological, Climatological and Geophysical Agency of Indonesia)
Estimated energy released: 8.9 x 10ten joules (24.8 megawatt hours, equivalent to 21.3 tonnes of TNT) Find out more
If you did NOT feel the earthquake although you are in the area, please report it! Your contribution is valuable to earthquake science, 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.
|4.1||10 km||Sumbawa region, Indonesia||BMKG|
|4.1||10 km||SUMBAWA REGION, INDONESIA||EMSC|
Previous earthquakes in the same region
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