M4.7 earthquake 129 km SE of Hihifo, Tonga
A magnitude 4.7 earthquake struck 129 km SE of Hihifo, Tonga on Sat, Aug 22, 1987, 7:45 AM GMT-11 (18:45 UTC), 33 km (21 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-08-22 18:45:21 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 16.691° S, 172.849° 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 1.7 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.2184 km SE of Hihifo, Tonga · 14285 days ago · 33 km deep · 55 km away
- 4.7206 km NE of Neiafu, Tonga · 14243 days ago · 38 km deep · 89 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00037r4. Read Sun, Oct 4, 2026, 6:38 AM UTC.