M4.0 earthquake 222 km WNW of Neiafu, Tonga
A magnitude 4.0 earthquake struck 222 km WNW of Neiafu, Tonga on Fri, May 20, 2016, 10:26 AM GMT+13 (21:26 UTC), 303 km (188 mi) below the surface.
A larger quake followed: M4.4 298 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
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2016-05-19 21:26:22 UTC
- Depth
- 303.1 km (188.3 mi), deep
- Epicenter
- 18.096° S, 176.005° 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 12.2 km horizontally, 9.6 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 108°
- Stations used
- 28
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.4298 km WNW of Neiafu, Tonga · 3761 days ago · 10 km deep · 78 km away
- 4.3292 km WNW of Neiafu, Tonga · 3730 days ago · 363 km deep · 98 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us20005y2j. Read Fri, Oct 2, 2026, 6:27 PM UTC.