M4.2 earthquake 166 km W of Hihifo, Tonga
A magnitude 4.2 earthquake struck 166 km W of Hihifo, Tonga on Mon, May 17, 2021, 2:57 AM GMT-12 (14:57 UTC), 330 km (205 mi) below the surface.
A larger quake followed: M4.6 198 km WNW 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
- 4.2 (mb), light
- Local time
- UTC
- 2021-05-17 14:57:34 UTC
- Depth
- 330.4 km (205.3 mi), deep
- Epicenter
- 16.006° S, 175.349° 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 12.5 km horizontally, 7.0 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 113°
- Stations used
- 59
Nearby
Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.4172 km WNW of Hihifo, Tonga · 1958 days ago · 369 km deep · 73 km away
- 4.4101 km WNW of Hihifo, Tonga · 1938 days ago · 255 km deep · 98 km away
- 4.3208 km WSW of Hihifo, Tonga · 1938 days ago · 173 km deep · 66 km away
- 4.3Tonga · 1935 days ago · 371 km deep · 58 km away
- 4.4114 km W of Hihifo, Tonga · 1930 days ago · 323 km deep · 53 km away
- 4.3126 km WNW of Hihifo, Tonga · 1918 days ago · 249 km deep · 85 km away
- 4.1226 km W of Hihifo, Tonga · 1913 days ago · 387 km deep · 61 km away
- 4.1177 km WSW of Hihifo, Tonga · 1910 days ago · 271 km deep · 64 km away
- 4.4163 km WSW of Hihifo, Tonga · 1905 days ago · 10 km deep · 38 km away
- 4.6198 km WNW of Hihifo, Tonga · 1905 days ago · 10 km deep · 74 km away
- 4.3150 km W of Hihifo, Tonga · 1904 days ago · 128 km deep · 16 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000e52l. Read Wed, Sep 30, 2026, 3:53 AM UTC.