Tonga earthquakes

M4.2 earthquake 87 km SSE of Pangai, Tonga

A magnitude 4.2 earthquake struck 87 km SSE of Pangai, Tonga on Fri, Sep 29, 2017, 3:36 AM GMT+13 (14:36 UTC), 39 km (24 mi) below the surface.

A larger quake followed: M6.1 103 km SE of Pangai, Tonga. This one was a foreshock.

Nuku‘alofa forecastMore in Tonga

Map

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

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The earthquake

Magnitude
4.2 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-09-28 14:36:33 UTC
Depth
38.8 km (24.1 mi), shallow
Epicenter
20.535° S, 174.011° 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 13.4 km horizontally, 15.8 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
141°
Stations used
18

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.557 km E of ‘Ohonua, Tonga · 3284 days ago · 35 km deep · 99 km away
  2. 6.1103 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 23 km away · felt by 2
  3. 4.4133 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 54 km away
  4. 4.5105 km ESE of Pangai, Tonga · 3270 days ago · 10 km deep · 64 km away
  5. 4.4114 km ESE of Pangai, Tonga · 3270 days ago · 10 km deep · 70 km away
  6. 4.677 km SE of Pangai, Tonga · 3263 days ago · 10 km deep · 30 km away
  7. 4.9137 km SE of Pangai, Tonga · 3250 days ago · 10 km deep · 70 km away
  8. 4.682 km SSE of Pangai, Tonga · 3244 days ago · 10 km deep · 6 km away
  9. 4.6137 km SE of Pangai, Tonga · 3237 days ago · 10 km deep · 62 km away
  10. 4.7102 km ESE of Pangai, Tonga · 3235 days ago · 10 km deep · 81 km away
  11. 4.6100 km ESE of Pangai, Tonga · 3234 days ago · 10 km deep · 66 km away

Before

  1. 4.447 km ESE of Pangai, Tonga · 3302 days ago · 10 km deep · 60 km away
  2. 4.8112 km ESE of Pangai, Tonga · 3309 days ago · 10 km deep · 84 km away
  3. 4.334 km E of Pangai, Tonga · 3310 days ago · 35 km deep · 86 km away
  4. 4.6135 km ESE of Pangai, Tonga · 3317 days ago · 10 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000b1wb. Read Sun, Oct 4, 2026, 9:02 AM UTC.