M4.5 earthquake 84 km NNW of Pangai, Tonga
A magnitude 4.5 earthquake struck 84 km NNW of Pangai, Tonga on Mon, Sep 4, 2017, 8:18 AM GMT+13 (19:18 UTC), 100 km (62 mi) below the surface.
A larger quake followed: M6.1 156 km NW of Pangai, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-09-03 19:18:13 UTC
- Depth
- 99.5 km (61.8 mi), intermediate-depth
- Epicenter
- 19.175° S, 174.799° 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 15.9 km horizontally, 15.0 km in depth
- Magnitude uncertainty
- ±0.12
- Depth from
- From location
- Station coverage gap
- 119°
- Stations used
- 21
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.9108 km WSW of Neiafu, Tonga · 3300 days ago · 129 km deep · 27 km away
- 4.7120 km W of Neiafu, Tonga · 3282 days ago · 10 km deep · 58 km away
- 4.6170 km WNW of Pangai, Tonga · 3281 days ago · 188 km deep · 100 km away
- 6.1156 km NW of Pangai, Tonga · 3280 days ago · 10 km deep · 83 km away · felt by 1
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000ag79. Read Thu, Oct 1, 2026, 7:24 AM UTC.