M4.4 earthquake 164 km ESE of Hihifo, Tonga
A magnitude 4.4 earthquake struck 164 km ESE of Hihifo, Tonga on Sat, Jul 10, 2021, 7:18 AM GMT+13 (18:18 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.7 172 km ESE 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
- 4.4 (mb), light
- Local time
- UTC
- 2021-07-09 18:18:45 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 16.335° S, 172.314° 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 9.9 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.22
- Depth from
- Operator assigned
- Station coverage gap
- 192°, poorly surrounded by stations
- 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: 1 in the 60 days after this one and 7 in the 30 days before it.
After
Before
- 5.075 km E of Hihifo, Tonga · 1909 days ago · 10 km deep · 92 km away
- 4.4112 km E of Hihifo, Tonga · 1922 days ago · 10 km deep · 56 km away
- 4.7139 km ESE of Hihifo, Tonga · 1927 days ago · 10 km deep · 44 km away
- 4.7181 km ESE of Hihifo, Tonga · 1931 days ago · 10 km deep · 58 km away
- 5.5157 km SE of Hihifo, Tonga · 1931 days ago · 10 km deep · 88 km away
- 4.580 km ESE of Hihifo, Tonga · 1936 days ago · 35 km deep · 88 km away
- 4.667 km ESE of Hihifo, Tonga · 1938 days ago · 7 km deep · 98 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000elxc. Read Wed, Sep 30, 2026, 6:16 AM UTC.