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M5.4 earthquake 41 km NNE of Ruteng, East Nusa Tenggara, Indonesia

A magnitude 5.4 earthquake struck 41 km NNE of Ruteng, East Nusa Tenggara, Indonesia at 16:03 local time (08:03 UTC) on 31 Aug 2026, at a depth of 10 km, according to USGS.

Data: USGS · updated 2026-09-24 13:58 UTC · reviewed

Magnitude
5.4moderate
body-wave magnitude (mb)
Depth
10 km
Status
Reviewed
Origin time
2026-08-31 08:03:27 UTC
Local: 31 Aug 2026, 16:03:27 (Asia/Makassar)
Epicentre
8.258° S, 120.573° E

Circles show this event and others within 63 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
PlaceDistanceEst. shaking
RutengEast Nusa Tenggara, Indonesia · pop. 41,53341 kmVModerate
Labuan BajoEast Nusa Tenggara, Indonesia · pop. 188,72480 kmIVLight
EndeEast Nusa Tenggara, Indonesia · pop. 87,269136 kmIIIWeak
MakassarSouth Sulawesi, Indonesia · pop. 1,474,393368 kmIIWeak
KupangEast Nusa Tenggara, Indonesia · pop. 474,801395 kmIIWeak

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more. Likely felt out to about 196 km.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses USGS, which has been reviewed by an analyst.

AgencyMagnitudeDepthEpicentreTime offsetStatus
USGSheadlineUSGS NEIC via U.S. Geological Survey5.4 mb10 km8.26° S, 120.57° E–Reviewed

How big was it?

Felt by most people over a wide area. Can damage poorly built structures close to the epicentre.

It released roughly the energy of 1.9 kt of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 10 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

M5.4 releases about 32× the energy of M4.4, and its waves are about 10× taller on a seismogram. Energy: 1.9 kt of TNT vs 60 t of TNT.

Each square is the energy of one M4.4. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

21 later earthquakes within 63 km; the largest was M5.5 7 days ago. 5 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M5.4

21 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)MagnitudeDepth (km)
30.064.510
34.144.910
46.054.710
80.024.310
111.244.510
124.534.510
160.894.170
170.614.310
188.625.310
205.654.616
240.644.310
283.524.610
326.615.010
328.844.510
370.384.310
436.294.710
461.885.110
497.645.510
545.994.510
611.604.814
635.565.010
  1. 5.536 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-21 01:41
  2. 5.352 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-08 04:40
  3. 5.168 km NE of Ruteng, East Nusa Tenggara, Indonesia09-19 13:56
  4. 5.051 km NE of Labuan Bajo, East Nusa Tenggara, Indonesia09-13 22:40
  5. 5.052 km NNW of Ruteng, East Nusa Tenggara, Indonesia09-26 19:37
  6. 4.951 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-01 18:11
  7. 4.843 km N of Ruteng, East Nusa Tenggara, Indonesia09-25 19:39
  8. 4.747 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-02 06:06
  9. 4.734 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-18 12:20
  10. 4.648 km N of Ruteng, East Nusa Tenggara, Indonesia09-08 21:42
  11. 4.645 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-12 03:34
  12. 4.577 km N of Ruteng, East Nusa Tenggara, Indonesia09-01 14:06
  13. 4.550 km NE of Ruteng, East Nusa Tenggara, Indonesia09-04 23:17
  14. 4.560 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-05 12:35
  15. 4.550 km NNW of Ruteng, East Nusa Tenggara, Indonesia09-14 00:53
  16. 4.564 km NE of Ruteng, East Nusa Tenggara, Indonesia09-23 02:02
  17. 4.397 km NNE of Ruteng, East Nusa Tenggara, Indonesia09-03 16:04
  18. 4.349 km NE of Labuan Bajo, East Nusa Tenggara, Indonesia09-07 10:40
  19. 4.361 km ENE of Ruteng, East Nusa Tenggara, Indonesia09-10 08:41
  20. 4.353 km NNW of Ruteng, East Nusa Tenggara, Indonesia09-15 18:26
  21. 4.176 km NE of Ruteng, East Nusa Tenggara, Indonesia09-07 00:56

Did you feel it?

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Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id us7000td2z. First recorded here 28 Sept 2026, 17:32:14 UTC. Solutions: USGS (usgs:us7000td2z). Cite as: SeismoAtlas, “M5.4 earthquake 41 km NNE of Ruteng, East Nusa Tenggara, Indonesia”, https://seismoatlas.com/earthquake/us7000td2z-m5-4-earthquake-41-km-nne-of-ruteng-east-nusa-tenggara-indonesia, data from USGS.

JSON: /api/v1/events/us7000td2z. SeismoAtlas is not an official warning service.