M4.6 earthquake 94 km S of Hihifo, Tonga
A magnitude 4.6 earthquake struck 94 km S of Hihifo, Tonga on Wed, Jul 1, 1987, 9:39 PM GMT-11 (08:39 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.8 141 km N 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
- 4.6 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-07-02 08:39:01 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.807° S, 173.711° 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.
- Depth from
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.6 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.759 km SW of Hihifo, Tonga · 14334 days ago · 33 km deep · 66 km away
- 4.287 km SE of Hihifo, Tonga · 14285 days ago · 33 km deep · 69 km away
- 4.7129 km SE of Hihifo, Tonga · 14285 days ago · 33 km deep · 93 km away
- 4.8141 km N of Neiafu, Tonga · 14279 days ago · 33 km deep · 65 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp000368k. Read Thu, Oct 1, 2026, 6:34 PM UTC.