M4.4 earthquake 114 km NW of Nuku‘alofa, Tonga
A magnitude 4.4 earthquake struck 114 km NW of Nuku‘alofa, Tonga on Sat, Aug 19, 2017, 12:01 AM GMT+13 (11:01 UTC), 227 km (141 mi) below the surface.
A larger quake followed: M5.1 71 km NNW of Nuku‘alofa, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-08-18 11:01:22 UTC
- Depth
- 226.5 km (140.8 mi), intermediate-depth
- Epicenter
- 20.345° S, 175.902° 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 11.8 km horizontally, 8.7 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 94°
- Stations used
- 36
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 3 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 us2000a9by. Read Thu, Oct 1, 2026, 8:13 AM UTC.