M4.3 earthquake 23 km W of Hihifo, Tonga
A magnitude 4.3 earthquake struck 23 km W of Hihifo, Tonga on Thu, Mar 18, 2021, 5:54 PM GMT+14 (03:54 UTC), 110 km (69 mi) below the surface.
A larger quake followed: M4.7 66 km N of Hihifo, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 2021-03-18 03:54:42 UTC
- Depth
- 110.4 km (68.6 mi), intermediate-depth
- Epicenter
- 15.965° S, 174.019° 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 8.5 km horizontally, 11.9 km in depth
- Magnitude uncertainty
- ±0.14
- Depth from
- From location
- Station coverage gap
- 135°
- Stations used
- 20
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.674 km NNE of Hihifo, Tonga · 2017 days ago · 10 km deep · 91 km away
- 4.0115 km W of Hihifo, Tonga · 2013 days ago · 255 km deep · 92 km away
- 4.685 km SSW of Hihifo, Tonga · 2003 days ago · 125 km deep · 81 km away
- 4.1111 km WSW of Hihifo, Tonga · 1995 days ago · 298 km deep · 89 km away
- 4.529 km SW of Hihifo, Tonga · 1984 days ago · 10 km deep · 20 km away
- 4.459 km ESE of Hihifo, Tonga · 1980 days ago · 35 km deep · 82 km away
- 4.588 km SW of Hihifo, Tonga · 1976 days ago · 170 km deep · 75 km away
- 4.650 km NNE of Hihifo, Tonga · 1974 days ago · 69 km deep · 65 km away
- 4.766 km N of Hihifo, Tonga · 1969 days ago · 22 km deep · 73 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000dwmp. Read Wed, Sep 30, 2026, 12:21 PM UTC.