Reported by USGS 74 days ago.
It is the 4th strongest of the 10 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 12 June 2026. 2 more were recorded here in the fortnight before it.
What the source measured
USGS reported: 286 km WNW of Houma, Tonga
USGS recorded magnitude 4.6 at a depth of 550 km.
Nearby, since 17 March 2026
- June 18, 2026 · score 7 · 2.5 km
- March 17, 2026 · score 2 · 10.5 km
- June 2, 2026 · score 15 · 17.3 km
How we know
Confirmed by 2 independent sources, including USGS.
Our own score for this event is 5 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Earthquake |
| Severity | low |
| Calamity Score (ours) | 5 / 100 |
| Our confidence | 65% |
| Coordinates | -19.8992, -177.6930 |
| Timestamp | 2026-06-18T21:09:15.212Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us7000sueg |
Score Breakdown
Technical Details
| Mag | 4.6 |
| Depth | 549.78 |
| Tsunami | false |
| Sig | 326 |
| Emsc Mag | 4.6 |
| Emsc Depth | -556.9 |
| Emsc MagType | mb |
| Emsc Region | FIJI REGION |
| Emsc Auth | EMSC |
| Emsc SourceId | 2013431 |
| MergedSources | [{"id":"emsc_20260618_0000335","source":"emsc","severity":"low","severityValue":27.599999999999998,"timestamp":1781816955600,"latitude":-19.8901,"longitude":-177.6629}] |
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 Tonga?
Calamity.live data shows a earthquake event with CalamityScore 5/100, 286 km WNW of Houma, Tonga (Tonga), based on data from usgs. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.