M4.2 earthquake Tonga
A magnitude 4.2 earthquake struck in Tonga on Mon, Aug 22, 2022, 1:21 AM GMT-12 (13:21 UTC), 333 km (207 mi) below the surface.
A larger quake followed: M4.6 159 km SE of Mata-Utu, Wallis and Futuna. 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
- 2022-08-22 13:21:32 UTC
- Depth
- 332.8 km (206.8 mi), deep
- Epicenter
- 15.314° S, 175.634° 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 10.3 km horizontally, 7.3 km in depth
- Magnitude uncertainty
- ±0.08
- Depth from
- From location
- Station coverage gap
- 85°
- Stations used
- 47
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.5257 km W of Hihifo, Tonga · 1491 days ago · 10 km deep · 93 km away
- 4.6159 km SE of Mata-Utu, Wallis and Futuna · 1489 days ago · 7 km deep · 98 km away
- 4.2218 km W of Hihifo, Tonga · 1466 days ago · 355 km deep · 85 km away
- 4.1137 km NW of Hihifo, Tonga · 1462 days ago · 221 km deep · 89 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000i40h. Read Fri, Oct 2, 2026, 9:41 AM UTC.