M4.9 earthquake 126 km ENE of Neiafu, Tonga
A magnitude 4.9 earthquake struck 126 km ENE of Neiafu, Tonga on Sun, Jul 27, 1986, 6:50 AM GMT-12 (18:50 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.2 204 km SE of Hihifo, 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
- 1986-07-27 18:50:27 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 18.153° S, 172.911° 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
Nearby
Within 100 km, magnitude 1.9 and up: 3 in the 60 days after this one and 6 in the 30 days before it.
After
- 5.2204 km SE of Hihifo, Tonga · 14643 days ago · 33 km deep · 98 km away
- 4.894 km ESE of Neiafu, Tonga · 14611 days ago · 33 km deep · 78 km away
- 4.793 km ESE of Neiafu, Tonga · 14609 days ago · 33 km deep · 82 km away
Before
- 4.6133 km E of Neiafu, Tonga · 14667 days ago · 33 km deep · 39 km away
- 4.2145 km E of Neiafu, Tonga · 14667 days ago · 33 km deep · 85 km away
- 5.0130 km ENE of Neiafu, Tonga · 14667 days ago · 33 km deep · 18 km away
- 5.0143 km E of Neiafu, Tonga · 14667 days ago · 33 km deep · 68 km away
- 5.1104 km NE of Neiafu, Tonga · 14668 days ago · 33 km deep · 32 km away
- 4.6111 km E of Neiafu, Tonga · 14697 days ago · 33 km deep · 72 km away
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002wks. Read Tue, Sep 22, 2026, 9:13 AM UTC.