M4.2 earthquake 232 km WSW of Hihifo, Tonga
A magnitude 4.2 earthquake struck 232 km WSW of Hihifo, Tonga on Mon, Oct 8, 2018, 1:43 AM GMT-12 (13:43 UTC), 296 km (184 mi) below the surface.
A larger quake followed: M4.5 217 km WNW of Neiafu, 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
- 2018-10-08 13:43:19 UTC
- Depth
- 295.6 km (183.7 mi), intermediate-depth
- Epicenter
- 16.962° S, 175.707° 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, 31.4 km in depth
- Magnitude uncertainty
- ±0.15
- Depth from
- From location
- Station coverage gap
- 154°
- Stations used
- 15
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.0201 km WSW of Hihifo, Tonga · 2914 days ago · 332 km deep · 31 km away
- 4.5217 km WNW of Neiafu, Tonga · 2861 days ago · 165 km deep · 71 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000hb62. Read Sun, Oct 4, 2026, 9:30 AM UTC.