M4.7 earthquake 173 km W of Neiafu, Tonga
A magnitude 4.7 earthquake struck 173 km W of Neiafu, Tonga on Mon, Oct 20, 2008, 9:43 PM GMT+13 (08:43 UTC), 180 km (112 mi) below the surface.
A larger quake followed: M6.4 146 km W 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
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2008-10-20 08:43:27 UTC
- Depth
- 179.7 km (111.7 mi), intermediate-depth
- Epicenter
- 18.807° S, 175.619° W
- Region
- Tonga
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
What happened
The USGS’s account of the effects of this earthquake.
no people dead or missing; no people injured; no buildings damaged or destroyed
From the USGS event page for usp000gknd. U.S. Geological Survey text and figures are in the public domain.
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Station coverage gap
- 78°
- Stations used
- 26
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 9 in the 60 days after this one and 0 in the 30 days before it.
After
- 6.4146 km W of Neiafu, Tonga · 6555 days ago · 233 km deep · 52 km away · felt by 3
- 4.5202 km WNW of Pangai, Tonga · 6543 days ago · 230 km deep · 60 km away
- 4.489 km W of Neiafu, Tonga · 6543 days ago · 96 km deep · 91 km away
- 4.587 km W of Neiafu, Tonga · 6542 days ago · 82 km deep · 87 km away
- 4.9Tonga · 6510 days ago · 260 km deep · 70 km away
- 4.5155 km WNW of Pangai, Tonga · 6506 days ago · 252 km deep · 49 km away
- 5.3128 km NW of Pangai, Tonga · 6505 days ago · 238 km deep · 46 km away
- 4.4244 km WNW of Pangai, Tonga · 6503 days ago · 301 km deep · 85 km away
- 4.4231 km W of Neiafu, Tonga · 6501 days ago · 254 km deep · 76 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000gknd. Read Sat, Oct 3, 2026, 1:11 PM UTC.