Tonga earthquakes

M4.8 earthquake 136 km NE of Hihifo, Tonga

A magnitude 4.8 earthquake struck 136 km NE of Hihifo, Tonga on Fri, Jul 20, 2018, 1:43 PM GMT+13 (00:43 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.1 126 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
4.8 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-07-20 00:43:22 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
15.135° S, 172.842° 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 7.7 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.08
Depth from
Operator assigned
Station coverage gap
107°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.8 and up: 9 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.690 km NE of Hihifo, Tonga · 2984 days ago · 35 km deep · 47 km away
  2. 4.9108 km N of Hihifo, Tonga · 2971 days ago · 33 km deep · 88 km away · felt by 1
  3. 4.6134 km NNE of Hihifo, Tonga · 2965 days ago · 10 km deep · 71 km away
  4. 5.1126 km NE of Hihifo, Tonga · 2965 days ago · 10 km deep · 26 km away
  5. 4.6102 km NNE of Hihifo, Tonga · 2964 days ago · 19 km deep · 67 km away
  6. 4.6111 km ENE of Hihifo, Tonga · 2961 days ago · 10 km deep · 32 km away
  7. 4.8123 km NE of Hihifo, Tonga · 2958 days ago · 10 km deep · 14 km away
  8. 4.9144 km NE of Hihifo, Tonga · 2948 days ago · 10 km deep · 20 km away
  9. 4.397 km NE of Hihifo, Tonga · 2938 days ago · 10 km deep · 45 km away

Before

  1. 4.5138 km SW of Gataivai, Samoa · 3005 days ago · 39 km deep · 74 km away
  2. 4.256 km NNE of Hihifo, Tonga · 3006 days ago · 90 km deep · 87 km away
  3. 4.878 km NNE of Hihifo, Tonga · 3009 days ago · 10 km deep · 65 km away · felt by 1
  4. 4.683 km NNE of Hihifo, Tonga · 3017 days ago · 35 km deep · 77 km away
  5. 4.9124 km ENE of Hihifo, Tonga · 3021 days ago · 10 km deep · 59 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000g9fz. Read Fri, Oct 2, 2026, 6:11 PM UTC.