M4.7 earthquake 51 km WSW of Neiafu, Tonga
A magnitude 4.7 earthquake struck 51 km WSW of Neiafu, Tonga on Sat, Apr 4, 1987, 6:53 AM GMT+13 (17:53 UTC), 145 km (90 mi) below the surface.
A larger quake followed: M5.1 74 km NE of Pangai, 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
- 1987-04-03 17:53:48 UTC
- Depth
- 144.5 km (89.8 mi), intermediate-depth
- Epicenter
- 18.770° S, 174.456° 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
- FROM_LOCATION
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00033wa. Read Sat, Oct 3, 2026, 5:46 PM UTC.