Tonga earthquakes

M4.6 earthquake 96 km NE of Hihifo, Tonga

A magnitude 4.6 earthquake struck 96 km NE of Hihifo, Tonga on Thu, Feb 4, 2021, 5:28 PM GMT+14 (03:28 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.0 122 km NE of Hihifo, Tonga. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
4.6 (mb), light
Local time
UTC
2021-02-04 03:28:00 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.394° S, 173.106° 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 9.3 km horizontally, 1.8 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
113°
Stations used
21

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.6 and up: 7 in the 60 days after this one and 6 in the 30 days before it.

After

  1. 4.5117 km NE of Hihifo, Tonga · 2063 days ago · 10 km deep · 24 km away
  2. 4.860 km ESE of Hihifo, Tonga · 2061 days ago · 10 km deep · 86 km away
  3. 4.933 km NE of Hihifo, Tonga · 2060 days ago · 37 km deep · 64 km away
  4. 5.0122 km NE of Hihifo, Tonga · 2046 days ago · 10 km deep · 39 km away · felt by 1
  5. 5.0112 km NNE of Hihifo, Tonga · 2044 days ago · 10 km deep · 36 km away · felt by 2
  6. 4.4147 km ENE of Hihifo, Tonga · 2026 days ago · 10 km deep · 60 km away
  7. 4.674 km NNE of Hihifo, Tonga · 2017 days ago · 10 km deep · 34 km away

Before

  1. 4.572 km ENE of Hihifo, Tonga · 2067 days ago · 10 km deep · 30 km away
  2. 4.663 km N of Hihifo, Tonga · 2073 days ago · 85 km deep · 62 km away
  3. 4.586 km E of Hihifo, Tonga · 2080 days ago · 10 km deep · 56 km away
  4. 4.983 km NE of Hihifo, Tonga · 2081 days ago · 10 km deep · 13 km away
  5. 4.450 km N of Hihifo, Tonga · 2082 days ago · 62 km deep · 81 km away
  6. 4.6108 km NNE of Hihifo, Tonga · 2092 days ago · 10 km deep · 57 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dgph. Read Wed, Sep 30, 2026, 11:29 AM UTC.