M4.6 earthquake 172 km WNW of Hihifo, Tonga
A magnitude 4.6 earthquake struck 172 km WNW of Hihifo, Tonga on Sun, Mar 28, 2021, 1:49 AM GMT-12 (13:49 UTC), 274 km (170 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 2021-03-28 13:49:58 UTC
- Depth
- 274.1 km (170.3 mi), intermediate-depth
- Epicenter
- 15.388° S, 175.294° 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 9.5 km horizontally, 6.0 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 118°
- Stations used
- 43
Nearby
Within 100 km, magnitude 1.6 and up: 3 in the 60 days after this one and 4 in the 30 days before it.
After
- 4.2166 km W of Hihifo, Tonga · 1962 days ago · 330 km deep · 69 km away
- 4.4172 km WNW of Hihifo, Tonga · 1959 days ago · 369 km deep · 4 km away
- 4.5210 km S of Mata-Utu, Wallis and Futuna · 1958 days ago · 10 km deep · 93 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us6000dx6a. Read Wed, Sep 30, 2026, 10:31 AM UTC.