M5.0 earthquake 266 km WNW of Neiafu, Tonga
A magnitude 5.0 earthquake struck 266 km WNW of Neiafu, Tonga on Wed, Oct 22, 1975, 4:57 AM GMT+13 (15:57 UTC), 61 km (38 mi) below the surface.
A larger quake followed: M5.1 278 km WNW 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
- 5.0 (mb), moderate
- Local time
- UTC
- 1975-10-21 15:57:08 UTC
- Depth
- 61.0 km (37.9 mi), shallow
- Epicenter
- 18.164° S, 176.454° 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
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.0 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.8288 km WNW of Neiafu, Tonga · 18551 days ago · 93 km deep · 34 km away
- 5.1278 km WNW of Neiafu, Tonga · 18545 days ago · 77 km deep · 34 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000d7m. Read Tue, Sep 22, 2026, 3:59 PM UTC.