Earthquake · 18 Oct 2026
M4.3 earthquake — 213 km WSW of Houma, Tonga
- Event
- Earthquake
- Magnitude
- M4.3 (Light)
- Severity
- Moderate
- Time
- (16 days ago)
- Location
- 213 km WSW of Houma, Tonga
- Country
- Open ocean / not assigned
- Coordinates
- -21.684°, -177.289°
- Source
- USGS Earthquake Hazards Program
What this means
This was a light earthquake of magnitude 4.3. Usually causes noticeable shaking and rattling of indoor objects, but significant damage is unlikely.
Magnitude measures the energy released at the source. How strongly the ground shook at any particular place depends on distance from the epicenter, the depth of the quake, local geology and building construction, so the same magnitude can be harmless in one place and damaging in another. First magnitudes are preliminary and are often revised by a few tenths as more stations report.
Other events within 300 km (±14 days)
- M4.4 earthquake — Fiji region — 275 km away, 31 Oct 2026, 10:42 UTC
- M4.6 earthquake — south of the Fiji Islands — 281 km away, 28 Oct 2026, 12:58 UTC
- M4.3 earthquake — 289 km W of Houma, Tonga — 120 km away, 23 Oct 2026, 06:07 UTC
- M4.8 earthquake — 144 km SSW of ‘Ohonua, Tonga — 214 km away, 22 Oct 2026, 16:51 UTC
- M4.2 earthquake — Fiji region — 204 km away, 22 Oct 2026, 04:16 UTC
- M4.1 earthquake — Fiji region — 255 km away, 21 Oct 2026, 14:24 UTC
- M4.8 earthquake — south of the Fiji Islands — 279 km away, 20 Oct 2026, 16:29 UTC
- M4.5 earthquake — Fiji region — 165 km away, 18 Oct 2026, 22:34 UTC
- M4.4 earthquake — south of the Fiji Islands — 250 km away, 16 Oct 2026, 09:01 UTC
- M5.9 earthquake — Fiji region — 172 km away, 14 Oct 2026, 10:49 UTC
Smaller earthquakes close in time and space to a larger one are often aftershocks or foreshocks, though GlobalRisk does not classify them.
Source and attribution
Source: USGS Earthquake Hazards Program. View the original report ↗
GlobalRisk republishes only basic facts (type, time, location, magnitude or alert level) and links to the original report. Details may be revised by the source after this page was generated on 3 Nov 2026, 06:40 UTC.
Related guides
- Earthquake Magnitude Explained: What M4, M6 and M7 Really Mean
- Earthquake Safety: What to Do Before, During and After
For situational awareness only, not an official warning. Follow local authorities. Open the live map