Reported by USGS today.
It is one of only 3 we have recorded within 20 km of this point since 3 September 2026. Another comparable one was recorded here earlier the same day.
What the source measured
USGS reported: 122 km WNW of Houma, Tonga
USGS recorded magnitude 4.5 at a depth of 218 km.
Nearby, since 3 September 2026
- September 3, 2026 · score 9 · 15.3 km
How we know
Confirmed by 2 independent sources, including USGS.
Our own score for this event is 5 out of 100, at 68 % 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) | 5 / 100 |
| Our confidence | 68% |
| Coordinates | -20.7887, -176.4067 |
| Nearest City | Nuku‘alofa (131 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T07:46:19.606Z |
| Source | https://earthquake.usgs.gov/earthquakes/eventpage/us7000tdv1 |
Score Breakdown
Technical Details
| Mag | 4.5 |
| Depth | 217.98 |
| Tsunami | false |
| Sig | 312 |
| Emsc Mag | 4.5 |
| Emsc Depth | -218 |
| Emsc MagType | mb |
| Emsc Region | FIJI REGION |
| Emsc Auth | NEIC |
| Emsc SourceId | 2055031 |
| MergedSources | [{"id":"emsc_20260903_0000114","source":"emsc","severity":"low","severityValue":27,"timestamp":1788421579606,"latitude":-20.7887,"longitude":-176.4067}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a earthquake event with CalamityScore 5/100, 122 km WNW of Houma, Tonga (Tonga), based on data from usgs. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.