M4.2 earthquake 269 km SW of Vaini, Tonga
A magnitude 4.2 earthquake struck 269 km SW of Vaini, Tonga on Fri, Jul 31, 2015, 10:03 AM GMT+13 (21:03 UTC), 251 km (156 mi) below the surface.
A larger quake followed: M4.5 241 km WSW of Haveluloto, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2015-07-30 21:03:05 UTC
- Depth
- 250.6 km (155.7 mi), intermediate-depth
- Epicenter
- 23.049° S, 176.864° 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 9.0 km horizontally, 12.9 km in depth
- Magnitude uncertainty
- ±0.11
- Depth from
- From location
- Station coverage gap
- 144°
- Stations used
- 31
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 1 in the 30 days before it.
After
- 4.5241 km WSW of Haveluloto, Tonga · 4081 days ago · 10 km deep · 88 km away
- 4.4292 km SW of Vaini, Tonga · 4069 days ago · 222 km deep · 47 km away
- 4.5294 km SW of Vaini, Tonga · 4055 days ago · 135 km deep · 26 km away
- 4.4south of the Fiji Islands · 4040 days ago · 132 km deep · 92 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10003359. Read Mon, Oct 5, 2026, 11:55 AM UTC.