M4.2 earthquake 182 km NW of Neiafu, Tonga
A magnitude 4.2 earthquake struck 182 km NW of Neiafu, Tonga on Sun, Sep 30, 2018, 2:01 AM GMT-12 (14:01 UTC), 206 km (128 mi) below the surface.
A larger quake followed: M4.5 137 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
- 2018-09-30 14:01:40 UTC
- Depth
- 206.5 km (128.3 mi), intermediate-depth
- Epicenter
- 17.406° S, 175.113° 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 9.9 km horizontally, 9.4 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 71°
- Stations used
- 21
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.2232 km WSW of Hihifo, Tonga · 2919 days ago · 296 km deep · 80 km away
- 4.0201 km WSW of Hihifo, Tonga · 2915 days ago · 332 km deep · 74 km away
- 4.5137 km WNW of Neiafu, Tonga · 2915 days ago · 264 km deep · 65 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000h7jy. Read Mon, Oct 5, 2026, 9:32 AM UTC.