Reported by BMKG today.
It is the 4th strongest of the 5 detections recorded within 20 km of this point since 1 September 2026. Another comparable one was recorded here earlier the same day.
What the source measured
BMKG reported: Pusat gempa berada di laut 65 km Tenggara Halmahera Tengah · Felt: III Maba
BMKG recorded magnitude 5.5 at a depth of 10 km.
The seismic region given by the source is Pusat gempa berada di laut 65 km Tenggara Halmahera Tengah.
Nearby, since 1 September 2026
- September 1, 2026 · score 21 · 16.3 km
How we know
Confirmed by 3 independent sources, including BMKG.
Our own score for this event is 20 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | medium |
| Calamity Score (ours) | 20 / 100 |
| Our confidence | 71% |
| Coordinates | 0.2600, 128.9200 |
| Nearest City | Sofifi (160 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-01T08:22:21.000Z |
| Source | https://www.bmkg.go.id/tews.html |
Score Breakdown
Technical Details
| Mag | 5.5 |
| Depth | 10 |
| Region | Pusat gempa berada di laut 65 km Tenggara Halmahera Tengah |
| TsunamiPotential | false |
| Felt | III Maba |
| Usgs Mag | 5.6 |
| Usgs Depth | 10 |
| Usgs Tsunami | false |
| Usgs Mmi | 6.23 |
| Usgs Alert | green |
| Usgs Sig | 482 |
| Emsc Mag | 5.6 |
| Emsc Depth | -10 |
| Emsc MagType | mb |
| Emsc Region | HALMAHERA, INDONESIA |
| Emsc Auth | EMSC |
| Emsc SourceId | 2053986 |
| MergedSources | [{"id":"usgs_us7000tdav","source":"usgs","severity":"medium","severityValue":44.8,"timestamp":1788250940813,"latitude":0.1685,"longitude":128.8054},{"id":"emsc_20260901_0000097","source":"emsc","severity":"medium","severityValue":44.8,"timestamp":1788250942220,"latitude":0.2545,"longitude":128.8302}] |
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 10 February 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 near Sofifi?
Calamity.live data shows a earthquake event with CalamityScore 20/100, in Indonesia (Indonesia), based on data from bmkg. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.