Reported by EMSC today.
It is the 8th strongest of the 9 detections recorded within 20 km of this point since 16 August 2026. Another comparable one was recorded here earlier the same day.
What the source measured
EMSC reported: FLORES SEA
EMSC recorded magnitude 4.0 at a depth of -18 km.
The seismic region given by the source is FLORES SEA.
Nearby, since 16 August 2026
- August 16, 2026 · score 17 · 11.0 km
- August 30, 2026 · score 4 · 12.3 km
- August 28, 2026 · score 3 · 13.6 km
How we know
One source: EMSC. Not yet confirmed by a second, independent source.
Our own score for this event is 0 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Low |
| Calamity Score (ours) | 0 / 100 |
| Our confidence | 65% |
| Coordinates | -7.9000, 120.6800 |
| Nearest City | Ruteng (83 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T16:04:37.000Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260903_0000263 |
Score Breakdown
Technical Details
| Mag | 4 |
| Depth | -18 |
| MagType | m |
| Region | FLORES SEA |
| Auth | BMKG |
| SourceId | 2055233 |
Safety Information
If you feel shaking: Drop, Cover, and Hold On. Move away from windows, heavy objects, and exterior walls. After shaking stops, check for injuries and structural damage. Be prepared for aftershocks, which can occur minutes to months after the mainshock. Follow instructions from local emergency management authorities.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a earthquake event with CalamityScore 0/100, in Flores Sea (Indonesia), based on data from emsc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.