M4.4 earthquake 181 km SW of Vaini, Tonga
A magnitude 4.4 earthquake struck 181 km SW of Vaini, Tonga on Sun, Oct 21, 2018, 6:49 AM GMT+13 (17:49 UTC), 155 km (96 mi) below the surface.
A larger quake followed: M4.8 192 km SW 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
- 4.4 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-10-20 17:49:17 UTC
- Depth
- 155.2 km (96.4 mi), intermediate-depth
- Epicenter
- 22.240° S, 176.529° 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 15.9 km horizontally, 8.8 km in depth
- Magnitude uncertainty
- ±0.16
- Depth from
- From location
- Station coverage gap
- 161°
- Stations used
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.3199 km SW of Vaini, Tonga · 2899 days ago · 303 km deep · 18 km away
- 4.3181 km WSW of Haveluloto, Tonga · 2883 days ago · 309 km deep · 79 km away
- 4.8192 km SW of ‘Ohonua, Tonga · 2868 days ago · 40 km deep · 75 km away
- 4.8124 km SW of ‘Ohonua, Tonga · 2865 days ago · 96 km deep · 84 km away
- 4.3133 km SW of Haveluloto, Tonga · 2856 days ago · 190 km deep · 49 km away
- 4.1200 km WSW of Haveluloto, Tonga · 2848 days ago · 275 km deep · 89 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000hgy7. Read Thu, Oct 1, 2026, 8:51 PM UTC.