M6.3 earthquake 62 km S of ‘Ohonua, Tonga
A magnitude 6.3 earthquake struck 62 km S of ‘Ohonua, Tonga on Sat, Mar 4, 1978, 5:46 PM GMT+13 (04:46 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
- 6.3 (ms), strong
- Local time
- UTC
- 1978-03-04 04:46:36 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 21.894° S, 174.854° 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
- Stations used
- 122
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 3.3 and up: 9 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.8Tonga · 17734 days ago · 33 km deep · 55 km away
- 5.197 km SSE of ‘Ohonua, Tonga · 17719 days ago · 45 km deep · 46 km away
- 5.2113 km SE of ‘Ohonua, Tonga · 17718 days ago · 33 km deep · 66 km away
- 5.067 km ESE of ‘Ohonua, Tonga · 17716 days ago · 33 km deep · 63 km away
- 5.7108 km ESE of ‘Ohonua, Tonga · 17715 days ago · 33 km deep · 88 km away
- 5.2120 km SE of ‘Ohonua, Tonga · 17713 days ago · 33 km deep · 86 km away
- 4.7148 km SSW of ‘Ohonua, Tonga · 17706 days ago · 33 km deep · 92 km away
- 5.859 km E of ‘Ohonua, Tonga · 17690 days ago · 33 km deep · 85 km away
- 4.975 km E of ‘Ohonua, Tonga · 17689 days ago · 33 km deep · 93 km away
Before
Earthquakes todayTonga earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000t7k (also filed as gcmtb030478a, gcmt19780304044636, iscgem684567). Read Tue, Sep 29, 2026, 4:28 AM UTC.