Right now
The most recent data we hold from BMKG arrived 45 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by BMKG today.
It is the 4th strongest of the 86 detections recorded within 20 km of this point since 19 August 2026. The last comparable one was on 18 September 2026. 20 more were recorded here in the fortnight before it.
What the source measured
BMKG reported: Pusat gempa berada di darat 34 km Timur Laut Ruteng · Felt: III-IV Manggarai, III-IV Bajawa, III-IV Labuan Bajo, II-III Nagekeo, II-III Waingapu, II Maumere
BMKG recorded magnitude 5.3 at a depth of 10 km.
The seismic region given by the source is Pusat gempa berada di darat 34 km Timur Laut Ruteng.
Urban PEI: 24,265 within a heuristic 70 km radius; not unique people.
Nearby, since 19 August 2026
- September 21, 2026 · score 30 · 0.0 km
- September 18, 2026 · score 22 · 3.1 km
- August 20, 2026 · score 19 · 3.9 km
How we know
4 recorded sources include BMKG; independence is not established by this count.
Our own score for this event is 24 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Earthquakes |
| Severity | Medium |
| Calamity Score (ours) | 24 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | -8.3300, 120.5900 |
| Nearest City | Ruteng (34 km) |
| Urban exposure index (PEI) | 24.3K within 70 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T01:41:37.000Z |
| Source | https://www.bmkg.go.id/tews.html |
Physical priority index · v5. 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: 2026-09-21T01:41:37.000Z.
First archived: 2026-09-21T02:02:07.519Z. Material modification: 2026-09-21T07:56:59.016Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-21T07:56:59.016Z · data_change
Index 30 → 24; severity medium → medium; version 5 → 5.
2026-09-21T07:46:14.242Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-21T06:19:50.933Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
2026-09-21T04:59:14.133Z · data_change
Index 30 → 30; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Mag | 5.3 |
| Depth | 10 |
| Region | Pusat gempa berada di darat 34 km Timur Laut Ruteng |
| TsunamiPotential | false |
| Felt | III-IV Manggarai, III-IV Bajawa, III-IV Labuan Bajo, II-III Nagekeo, II-III Waingapu, II Maumere |
| Usgs Mag | 5.5 |
| Usgs Depth | 10 |
| Usgs Tsunami | false |
| Usgs Mmi | 6.7 |
| Usgs Alert | green |
| Usgs Sig | 465 |
| Emsc Mag | 5.5 |
| Emsc Depth | 12.1 |
| Emsc MagType | mb |
| Emsc Region | FLORES REGION, INDONESIA |
| Emsc Auth | EMSC |
| Emsc SourceId | 2063122 |
| Usgs Shakemap Mag | 5.5 |
| Usgs Shakemap Depth | 10 |
| Usgs Shakemap Mmi | 6.7 |
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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