LIGHT EARTHQUAKE
Mariana Islands region
A magnitude 4.3 earthquake struck Mariana Islands region on 16 Oct 2026, 03:57 UTC. The hypocentre was 343.1 km below the surface — deep by seismological convention. 6 other earthquakes above our reporting threshold have been recorded within 250 km in the past 30 days.
- Depth
- 343.1 km
- Latitude
- 21.54°N
- Time
- 03:57 UTC
- Magnitude
- M4.3
deep
142.99°E longitude
16 Oct 2026
mb
EPICENTRE
MAGNITUDE 4.3
Noticeable shaking of indoor objects. Damage is unlikely.
The scale is logarithmic: this released about 89 times the energy of a magnitude 3.0, roughly the energy of 43 tonnes of TNT.
343.1 KM DEEP
Deep earthquakes rarely cause damage. The energy dissipates over hundreds of kilometres before reaching the surface, though it can still be felt far from the epicentre.
NEARBY IN THE PAST 30 DAYS
6 earthquakes above our reporting threshold within 250 km of this one, the largest a magnitude 5.5.
OTHER RECENT EARTHQUAKES
19 Oct 2026, 08:51 UTC · 124.8 km deep
19 Oct 2026, 08:21 UTC · 10 km deep
19 Oct 2026, 08:12 UTC · 10 km deep
19 Oct 2026, 07:55 UTC · 10 km deep