M5.1 earthquake 106 km E of ‘Ohonua, Tonga
A magnitude 5.1 earthquake struck 106 km E of ‘Ohonua, Tonga on Sun, Sep 23, 2018, 7:35 AM GMT+13 (18:35 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M6.1 79 km SSE of Pangai, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.1 (mb, body-wave), moderate
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-09-22 18:35:36 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 21.334° S, 173.924° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 8.1 km horizontally, 1.7 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 80°
- Stations used
- 158
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.1 and up: 1 in the 60 days after this one and 3 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000hirf. Read Fri, Oct 2, 2026, 3:23 PM UTC.