M4.2 earthquake 107 km WNW of Hihifo, Tonga
A magnitude 4.2 earthquake struck 107 km WNW of Hihifo, Tonga on Fri, Aug 10, 2018, 6:30 PM GMT+13 (05:30 UTC), 260 km (162 mi) below the surface.
A larger quake followed: M4.9 Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-10 05:30:17 UTC
- Depth
- 260.4 km (161.8 mi), intermediate-depth
- Epicenter
- 15.722° S, 174.768° 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 9.4 km horizontally, 12.3 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- From location
- Station coverage gap
- 103°
- Stations used
- 16
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.2119 km WNW of Hihifo, Tonga · 2972 days ago · 278 km deep · 13 km away
- 4.694 km NW of Hihifo, Tonga · 2955 days ago · 225 km deep · 43 km away
- 4.1101 km WNW of Hihifo, Tonga · 2953 days ago · 279 km deep · 12 km away
- 4.5150 km WNW of Hihifo, Tonga · 2941 days ago · 247 km deep · 43 km away
- 4.3100 km NNW of Hihifo, Tonga · 2938 days ago · 153 km deep · 89 km away
- 4.9Tonga · 2930 days ago · 10 km deep · 55 km away
- 4.3150 km WSW of Hihifo, Tonga · 2919 days ago · 332 km deep · 84 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000gad3. Read Fri, Oct 2, 2026, 12:23 PM UTC.