Right now
The most recent data we hold from BMKG arrived 6 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 10 km from here.
Reported by BMKG 15 days ago.
It is the 8th strongest of the 101 detections recorded within 20 km of this point since 19 August 2026. Another comparable one was recorded here earlier the same day.
What the source measured
BMKG reported: Pusat gempa berada di laut 50 km timur laut Ruteng, Manggarai · Felt: III-IV Kab.Manggarai, III Kab.Manggarai Barat, III Kab.Sikka, II-III Kab.Sumba Timur
BMKG recorded magnitude 5.5 at a depth of 10 km.
The seismic region given by the source is Pusat gempa berada di laut 50 km timur laut Ruteng, Manggarai.
Nearby, since 19 August 2026
- August 29, 2026 · score 2 · 1.6 km
- August 29, 2026 · score 2 · 1.6 km
- September 8, 2026 · score 30 · 3.8 km
How we know
3 recorded sources include BMKG; independence is not established by this count.
Our own score for this event is 20 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v2. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Medium |
| Calamity Score (ours) | 20 / 100 |
| Legacy data-support index | 0.72/1 |
| Coordinates | -8.1700, 120.5800 |
| Nearest City | Ruteng (51 km) |
| Urban exposure index (PEI) | 0 within 20 km |
| Impact Tier | minor |
| Timestamp | 2026-08-31T08:03:29.000Z |
| Source | https://www.bmkg.go.id/tews.html |
Physical priority index · v2. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: bmkg. Occurrence: 2026-08-31T08:03:29.000Z.
First archived: 2026-08-31T10:29:11.495Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Mag | 5.5 |
| Depth | 10 |
| Region | Pusat gempa berada di laut 50 km timur laut Ruteng, Manggarai |
| TsunamiPotential | false |
| Felt | III-IV Kab.Manggarai, III Kab.Manggarai Barat, III Kab.Sikka, II-III Kab.Sumba Timur |
| Usgs Mag | 5.5 |
| Usgs Depth | 10 |
| Usgs Tsunami | false |
| Usgs Mmi | 6.41 |
| Usgs Alert | green |
| Usgs Sig | 465 |
| Emsc Mag | 5.5 |
| Emsc Depth | 10 |
| Emsc MagType | mb |
| Emsc Region | FLORES REGION, INDONESIA |
| Emsc Auth | EMSC |
| Emsc SourceId | 2053509 |
| MergedSources | [{"id":"usgs_us7000td2z","source":"usgs","severity":"medium","severityValue":44,"timestamp":1788163408497,"latitude":-8.241,"longitude":120.6119},{"id":"emsc_20260831_0000087","source":"emsc","severity":"medium","severityValue":44,"timestamp":1788163408690,"latitude":-8.1853,"longitude":120.5778}] |
Cascade Risks
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.
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