M4.6 earthquake 130 km ESE of ‘Ohonua, Tonga
A magnitude 4.6 earthquake struck 130 km ESE of ‘Ohonua, Tonga on Sat, Aug 4, 2018, 12:46 PM GMT+13 (23:46 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.1 106 km E of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-03 23:46:42 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 21.816° S, 173.805° 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 9.6 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.09
- Depth from
- Operator assigned
- Station coverage gap
- 82°
- Stations used
- 45
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.5191 km SE of ‘Ohonua, Tonga · 2979 days ago · 10 km deep · 71 km away
- 5.1106 km E of ‘Ohonua, Tonga · 2932 days ago · 10 km deep · 55 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000g5a4. Read Fri, Oct 2, 2026, 1:45 PM UTC.