M4.0 earthquake 115 km WSW of Hihifo, Tonga
A magnitude 4.0 earthquake struck 115 km WSW of Hihifo, Tonga on Sat, Aug 5, 2017, 5:36 AM GMT-12 (17:36 UTC), 288 km (179 mi) below the surface.
A larger quake followed: M4.3 111 km SW of Hihifo, 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
- 2017-08-05 17:36:24 UTC
- Depth
- 287.6 km (178.7 mi), intermediate-depth
- Epicenter
- 16.212° S, 174.838° 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 18.3 km horizontally, 12.0 km in depth
- Magnitude uncertainty
- ±0.17
- Depth from
- From location
- Station coverage gap
- 120°
- Stations used
- 15
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.2116 km NW of Hihifo, Tonga · 3314 days ago · 256 km deep · 99 km away
- 4.3111 km SW of Hihifo, Tonga · 3299 days ago · 235 km deep · 53 km away
- 4.2147 km WNW of Hihifo, Tonga · 3287 days ago · 264 km deep · 89 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000a6g6. Read Sat, Oct 3, 2026, 2:59 AM UTC.