M4.2 earthquake 137 km SW of Vaini, Tonga
A magnitude 4.2 earthquake struck 137 km SW of Vaini, Tonga on Wed, Jul 22, 2020, 10:54 PM GMT+13 (09:54 UTC), 74 km (46 mi) below the surface.
A larger quake followed: M5.6 189 km SSW of ‘Ohonua, 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
- 2020-07-22 09:54:25 UTC
- Depth
- 74.0 km (46.0 mi), intermediate-depth
- Epicenter
- 22.091° S, 176.088° 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 14.5 km horizontally, 10.3 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 116°
- Stations used
- 17
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 4 in the 30 days before it.
After
- 5.6189 km SSW of ‘Ohonua, Tonga · 2254 days ago · 20 km deep · 82 km away
- 4.6100 km SW of Haveluloto, Tonga · 2253 days ago · 106 km deep · 41 km away
- 5.369 km SSW of Vaini, Tonga · 2230 days ago · 20 km deep · 76 km away · felt by 2
- 4.1184 km WSW of Haveluloto, Tonga · 2228 days ago · 153 km deep · 65 km away
Before
- 4.4171 km SSW of ‘Ohonua, Tonga · 2280 days ago · 112 km deep · 68 km away
- 4.5139 km WSW of Haveluloto, Tonga · 2286 days ago · 147 km deep · 44 km away
- 4.4154 km WSW of Haveluloto, Tonga · 2286 days ago · 121 km deep · 48 km away
- 4.883 km SSW of ‘Ohonua, Tonga · 2287 days ago · 35 km deep · 83 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000b5xa. Read Sat, Oct 3, 2026, 9:25 AM UTC.