Earthquake Information: Powerful Mag. Earthquake 5.1 – 57 km northwest of Dompu, West Nusa Tenggara, Indonesia, on Friday October 1, 2021 at 7.15 p.m. (GMT +8)


Strong magnitude 5.1 earthquake at a depth of 16 km

1 October 11:28 UTC: First to report: GFZ after 13 minutes.
October 1 11:30 a.m.: Now using data updates from BMKG
1 October 11:35: Depth of the hypocenter recalculated from 22.0 to 16.0 km (13.7 to 9.9 mi). Epicenter location corrected 1.1 km (0.7 mi) towards S.

Updated Fri 1 Oct 2021, 11:33

Significant 5.1 magnitude earthquake 57 km northwest of Dompu, Indonesia

Earthquake 5.1 on October 1, 7.15 p.m. (GMT +8)

Earthquake 5.1 on October 1, 7.15 p.m. (GMT +8)

A magnitude 5.1 earthquake occurred in the early evening on Friday October 1, 2021 at 7:15 p.m. local time near Dompu, Dompu Regency, West Nusa Tenggara, Indonesia, as reported by the Indonesian Meteorological Agency, climatology and geophysics.
According to preliminary data, the earthquake was located at a shallow depth of 22 km. Shallow earthquakes are felt more strongly than deep ones because they are closer to the surface. The exact magnitude, epicenter and depth of the quake could be revised in the coming hours or minutes, as seismologists review the data and refine their calculations, or when other agencies release their report.
Our monitoring service identified a second report from the German Research Center for Geosciences (GFZ) which listed the earthquake at a magnitude of 4.9. A third agency, the Euro-Mediterranean Seismological Center (EMSC), reported the same 4.9 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 Dompu (49,000 inhabitants) located 57 km from the epicenter, Pototano (5,000 inhabitants) at 72 km, Bima (67,000 inhabitants) at 77 km and Sumbawa Besar (52,700 inhabitants) 82 km one way.
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 through our mobile app. This will help us provide more first-hand updates to anyone in the world who is interested in learning more about this earthquake.

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Earthquake data

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Date and hour : October 1, 2021 11:15:50 UTC –
Local time at epicenter: Friday October 1, 2021 7:15 p.m. (GMT +8)
Magnitude: 5.1
Depth: 16.0 km

Latitude / longitude of epicenter: 8.19 ° S / 118.09 ° E↗ (West Nusa Tenggara, Indonesia)
Antipode: 8.19 ° N / 61.91 ° ​​W↗
Nearest volcano: Tambora (13 km / 8 mi)

Nearby towns and villages:
56 km (35 mi) northwest of Subdued (pop: 49,000) -> See nearby earthquakes!
71 km (44 mi) ENE of Pototano (Kabupaten Sumbawa) (pop: 5,000) -> See earthquakes nearby!
76 km (47 mi) to WNW of Bima (pop: 67,000) -> See nearby earthquakes!
81 km (50 mi) ENE of Sumbawa Besar (pop: 52,700) -> Observe the earthquakes nearby!
201 km (125 mi) west of Labuan Bajo (East of Nusa Tenggara) (pop: 188,700) -> Observe the earthquakes nearby!
208 km (129 mi) ENE of Praya (Kabupaten Lombok Tengah) (pop: 35,200) -> Observe the earthquakes nearby!
222 km (138 mi) ENE of matalam (pop: 318,700) -> See nearby earthquakes!
222 km (138 mi) ENE of matalam (pop: 318,700) -> See nearby earthquakes!
320 km (199 mi) east of Denpasar (Bali) (pop: 834 900) -> Observe the earthquakes nearby!
369 km (229 mi) SSO from Macassar (South Sulawesi) (pop: 1,321,700) -> See earthquakes nearby!

Weather at the epicenter at the time of the earthquake:
Some clouds 21.6 ° C (71 F), humidity: 81%, wind: 3 m / s (5 kts) from S

Main data source: BMKG (Meteorological, Climatological and Geophysical Agency of Indonesia)

Estimated energy released: 2.8 x 1012 joules (783 megawatt hours, equivalent to 674 tonnes of TNT) Find out more

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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.

Mag. Depth Site Source
5.1 16 km Sumbawa region, Indonesia BMKG
4.9 11 km Sumbawa region, Indonesia GFZ
4.9 39 km 52 km on the northwest of Dompu, Indonesia USGS


More information

Aftershocks recorded, most recent first (2 earthquakes so far, frequently updated)

  • 01 Oct 2021 14:32 UTC

    | M 2.4 |

    19 km (11.8 mi) deep


    Distance of 4 km (2 mi)

    | BMKG | Details

  • 01 Oct 2021 13:55 UTC

    | M 2.3 |

    12 km (7.5 mi) deep


    Distance of 12 km (7 mi)

    | BMKG | Details

Previous earthquakes in the same region

Click here to search our database for previous earthquakes in the same area since 1900!


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