Right now
The most recent data we hold from EMSC arrived 35 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
Reported by EMSC yesterday.
It is the 4th strongest of the 6 detections recorded within 20 km of this point since 24 March 2026. The last comparable one was on 17 May 2026.
What the source measured
EMSC reported: TONGA
EMSC recorded magnitude 4.8 at a depth of 195 km.
The seismic region given by the source is TONGA.
This is the lowest magnitude we have recorded at this point, over 132 readings since 11 September 2026 — the previous range was 4.8 to 5.
Nearby, since 24 March 2026
- May 7, 2026 · score 5 · 10.6 km
- May 6, 2026 · score 6 · 10.6 km
- March 24, 2026 · score 40 · 13.0 km
How we know
Confirmed by 2 independent sources, including EMSC.
Our own score for this event is 7 out of 100, at 70 % 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) | 7 / 100 |
| Our confidence | 70% |
| Coordinates | -18.6454, -175.4391 |
| Nearest City | Nuku‘alofa (279 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-11T08:58:07.800Z |
| Source | https://www.seismicportal.eu/eventdetail.html?unid=20260911_0000120 |
Score Breakdown
Technical Details
| Mag | 4.8 |
| Depth | 195 |
| MagType | mb |
| Region | TONGA |
| Auth | EMSC |
| SourceId | 2058802 |
| Gfz Mag | 4.83 |
| Gfz Depth | 313.7 |
| Gfz MagType | mb |
| Gfz Region | Tonga Islands |
| MergedSources | [{"id":"gfz_gfz2026ruya","source":"gfz","severity":"low","severityValue":28.98,"timestamp":1789117100340,"latitude":-18.83,"longitude":-175.629}] |
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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