M4.3 earthquake 111 km SSW of Hihifo, Tonga
A magnitude 4.3 earthquake struck 111 km SSW of Hihifo, Tonga on Mon, May 3, 2021, 7:38 PM GMT-12 (07:38 UTC), 167 km (104 mi) below the surface.
A larger quake followed: M4.8 141 km NNW of Neiafu, 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
- 2021-05-04 07:38:34 UTC
- Depth
- 167.3 km (104.0 mi), intermediate-depth
- Epicenter
- 16.907° S, 174.135° 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 15.3 km horizontally, 8.5 km in depth
- Magnitude uncertainty
- ±0.13
- Depth from
- From location
- Station coverage gap
- 141°
- Stations used
- 21
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.8141 km NNW of Neiafu, Tonga · 1951 days ago · 105 km deep · 67 km away
- 4.436 km S of Hihifo, Tonga · 1948 days ago · 80 km deep · 80 km away
- 4.5Tonga · 1948 days ago · 10 km deep · 43 km away
- 4.436 km SE of Hihifo, Tonga · 1942 days ago · 102 km deep · 97 km away
- 4.5138 km S of Hihifo, Tonga · 1918 days ago · 10 km deep · 60 km away
Before
- 4.588 km SW of Hihifo, Tonga · 1976 days ago · 170 km deep · 43 km away
- 4.529 km SW of Hihifo, Tonga · 1983 days ago · 10 km deep · 86 km away
- 4.2139 km WSW of Hihifo, Tonga · 1988 days ago · 305 km deep · 89 km away
- 4.1111 km WSW of Hihifo, Tonga · 1994 days ago · 298 km deep · 91 km away
- 4.685 km SSW of Hihifo, Tonga · 2003 days ago · 125 km deep · 27 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000e22g. Read Wed, Sep 30, 2026, 3:53 AM UTC.