M4.9 earthquake 97 km E of ‘Ohonua, Tonga
A magnitude 4.9 earthquake struck 97 km E of ‘Ohonua, Tonga on Fri, Apr 24, 1987, 8:26 AM GMT+13 (19:26 UTC), 40 km (25 mi) below the surface.
A larger quake followed: M5.6 74 km ENE 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
- 4.9 (mb), light
- Local time
- UTC
- 1987-04-23 19:26:39 UTC
- Depth
- 39.6 km (24.6 mi), shallow
- Epicenter
- 21.507° S, 174.024° 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
- CONSTRAINED_BY_DEPTH_PHASES
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 5.674 km ENE of ‘Ohonua, Tonga · 14377 days ago · 33 km deep · 43 km away
- 4.799 km ENE of ‘Ohonua, Tonga · 14375 days ago · 33 km deep · 60 km away
- 4.481 km NE of ‘Ohonua, Tonga · 14345 days ago · 120 km deep · 72 km away
Before
- 5.381 km E of ‘Ohonua, Tonga · 14427 days ago · 32 km deep · 26 km away
- 5.028 km ENE of ‘Ohonua, Tonga · 14431 days ago · 33 km deep · 75 km away
- 4.889 km SE of ‘Ohonua, Tonga · 14431 days ago · 33 km deep · 46 km away
- 6.151 km E of ‘Ohonua, Tonga · 14431 days ago · 81 km deep · 47 km away
- 5.6120 km E of ‘Ohonua, Tonga · 14432 days ago · 20 km deep · 23 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00034dr. Read Tue, Sep 29, 2026, 3:57 AM UTC.