M4.3 earthquake 111 km SW of Hihifo, Tonga
A magnitude 4.3 earthquake struck 111 km SW of Hihifo, Tonga on Wed, Sep 20, 2017, 7:09 PM GMT-12 (07:09 UTC), 235 km (146 mi) below the surface.
A larger quake followed: M5.3 146 km NNW 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
- 4.3 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-09-21 07:09:28 UTC
- Depth
- 235.1 km (146.1 mi), intermediate-depth
- Epicenter
- 16.622° S, 174.583° 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 8.5 km horizontally, 6.5 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- From location
- Station coverage gap
- 84°
- Stations used
- 21
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000awpe. Read Fri, Oct 2, 2026, 12:48 PM UTC.