M4.9 earthquake 112 km N of Neiafu, Tonga
A magnitude 4.9 earthquake struck 112 km N of Neiafu, Tonga on Wed, Oct 8, 1975, 5:17 AM GMT-12 (17:17 UTC), 65 km (40 mi) below the surface.
A larger quake followed: M5.5 127 km NW 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
- 4.9 (mb), light
- Local time
- UTC
- 1975-10-08 17:17:40 UTC
- Depth
- 65.0 km (40.4 mi), shallow
- Epicenter
- 17.633° S, 173.918° 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.
- Stations used
- 21
Nearby
Within 100 km, magnitude 1.9 and up: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.2129 km SSE of Hihifo, Tonga · 18591 days ago · 214 km deep · 75 km away
- 4.1141 km NE of Neiafu, Tonga · 18564 days ago · 33 km deep · 93 km away
- 4.9126 km NW of Neiafu, Tonga · 18562 days ago · 33 km deep · 87 km away
- 5.5127 km NW of Neiafu, Tonga · 18562 days ago · 33 km deep · 90 km away
- 5.066 km NW of Neiafu, Tonga · 18562 days ago · 109 km deep · 89 km away
- 5.0127 km NW of Neiafu, Tonga · 18561 days ago · 78 km deep · 85 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000d3d. Read Tue, Sep 22, 2026, 3:15 PM UTC.