M4.2 earthquake 119 km WNW of Hihifo, Tonga
A magnitude 4.2 earthquake struck 119 km WNW of Hihifo, Tonga on Mon, Aug 13, 2018, 3:27 PM GMT+13 (02:27 UTC), 278 km (172 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
- 2018-08-13 02:27:30 UTC
- Depth
- 277.5 km (172.5 mi), intermediate-depth
- Epicenter
- 15.649° S, 174.866° 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 15.2 km horizontally, 6.7 km in depth
- Magnitude uncertainty
- ±0.14
- Depth from
- From location
- Station coverage gap
- 66°
- Stations used
- 32
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
- 4.694 km NW of Hihifo, Tonga · 2956 days ago · 225 km deep · 46 km away
- 4.1101 km WNW of Hihifo, Tonga · 2955 days ago · 279 km deep · 19 km away
- 4.5150 km WNW of Hihifo, Tonga · 2942 days ago · 247 km deep · 32 km away
- 4.3100 km NNW of Hihifo, Tonga · 2939 days ago · 153 km deep · 91 km away
- 4.9Tonga · 2931 days ago · 10 km deep · 46 km away
- 4.4211 km W of Hihifo, Tonga · 2928 days ago · 340 km deep · 94 km away
- 4.3150 km WSW of Hihifo, Tonga · 2920 days ago · 332 km deep · 87 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000gbgl. Read Sat, Oct 3, 2026, 6:38 PM UTC.