Tonga earthquakes

M6.0 earthquake 18 km WNW of Hihifo, Tonga

A magnitude 6.0 earthquake struck 18 km WNW of Hihifo, Tonga on Fri, Oct 19, 1984, 3:37 AM GMT-11 (14:37 UTC), 121 km (75 mi) below the surface.

Apia forecastMore in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
6.0 (mw), strong
Local time
UTC
1984-10-19 14:37:50 UTC
Depth
121.1 km (75.2 mi), intermediate-depth
Epicenter
15.888° S, 173.950° 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 2.5 and up: 4 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.459 km S of Hihifo, Tonga · 15309 days ago · 33 km deep · 70 km away
  2. 4.659 km WNW of Hihifo, Tonga · 15302 days ago · 122 km deep · 42 km away
  3. 4.686 km SW of Hihifo, Tonga · 15300 days ago · 192 km deep · 86 km away
  4. 4.377 km NE of Hihifo, Tonga · 15288 days ago · 33 km deep · 84 km away

Before

  1. 7.219 km ENE of Hihifo, Tonga · 15317 days ago · 128 km deep · 33 km away
  2. 4.895 km NNE of Hihifo, Tonga · 15331 days ago · 60 km deep · 94 km away
  3. 4.775 km NNE of Hihifo, Tonga · 15331 days ago · 33 km deep · 75 km away

Earthquakes todayTonga earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00028a7 (also filed as gcmtb101984b, gcmt19841019143750, iscgem541635). Read Tue, Sep 22, 2026, 8:22 AM UTC.