M4.2 earthquake 206 km WSW of Haveluloto, Tonga
A magnitude 4.2 earthquake struck 206 km WSW of Haveluloto, Tonga on Sun, May 20, 2018, 6:38 PM GMT+13 (05:38 UTC), 175 km (109 mi) below the surface.
A larger quake followed: M5.2 202 km SW of Vaini, 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
- 2018-05-20 05:38:31 UTC
- Depth
- 175.3 km (109.0 mi), intermediate-depth
- Epicenter
- 22.107° S, 176.931° 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 15.3 km horizontally, 9.7 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 106°
- Stations used
- 24
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000eb37. Read Thu, Oct 1, 2026, 3:36 AM UTC.