M4.7 earthquake 71 km SE of ‘Ohonua, Tonga
A magnitude 4.7 earthquake struck 71 km SE of ‘Ohonua, Tonga on Thu, Jul 2, 1987, 7:51 AM GMT+13 (18:51 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.3 46 km E of ‘Ohonua, Tonga. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1987-07-01 18:51:03 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 21.867° S, 174.565° 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: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 5.175 km SE of ‘Ohonua, Tonga · 14323 days ago · 33 km deep · 9 km away
- 5.1119 km SSE of ‘Ohonua, Tonga · 14300 days ago · 33 km deep · 50 km away
- 5.1102 km SE of ‘Ohonua, Tonga · 14300 days ago · 33 km deep · 35 km away
- 5.346 km E of ‘Ohonua, Tonga · 14281 days ago · 114 km deep · 65 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0003688. Read Thu, Oct 1, 2026, 5:02 AM UTC.