Tonga earthquakes

M4.2 earthquake 139 km WSW of Hihifo, Tonga

A magnitude 4.2 earthquake struck 139 km WSW of Hihifo, Tonga on Tue, Apr 20, 2021, 12:24 PM GMT-12 (00:24 UTC), 305 km (189 mi) below the surface.

A larger quake followed: M4.5 88 km SW of Hihifo, Tonga. This one was a foreshock.

More 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
4.2 (mb), light
Local time
UTC
2021-04-21 00:24:47 UTC
Depth
304.6 km (189.3 mi), deep
Epicenter
16.609° S, 174.913° 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.

Location uncertainty
About 15.0 km horizontally, 4.8 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
131°
Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.588 km SW of Hihifo, Tonga · 1976 days ago · 170 km deep · 62 km away
  2. 4.3111 km SSW of Hihifo, Tonga · 1975 days ago · 167 km deep · 89 km away
  3. 4.2166 km W of Hihifo, Tonga · 1962 days ago · 330 km deep · 82 km away
  4. 4.5Tonga · 1948 days ago · 10 km deep · 64 km away
  5. 4.3208 km WSW of Hihifo, Tonga · 1938 days ago · 173 km deep · 80 km away
  6. 4.4114 km W of Hihifo, Tonga · 1930 days ago · 323 km deep · 59 km away

Before

  1. 4.3181 km NW of Neiafu, Tonga · 1994 days ago · 282 km deep · 80 km away
  2. 4.1111 km WSW of Hihifo, Tonga · 1995 days ago · 298 km deep · 34 km away
  3. 4.685 km SSW of Hihifo, Tonga · 2003 days ago · 125 km deep · 96 km away
  4. 4.0115 km W of Hihifo, Tonga · 2012 days ago · 255 km deep · 67 km away

Earthquakes todayTonga earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000dxw0. Read Wed, Sep 30, 2026, 9:52 AM UTC.