Tonga earthquakes

M4.4 earthquake 114 km ESE of Pangai, Tonga

A magnitude 4.4 earthquake struck 114 km ESE of Pangai, Tonga on Sun, Oct 22, 2017, 6:20 AM GMT+13 (17:20 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.7 130 km SSE 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
4.4 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-10-21 17:20:14 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
20.299° S, 173.388° 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 7.4 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.15
Depth from
Operator assigned
Station coverage gap
139°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 14 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.677 km SE of Pangai, Tonga · 3263 days ago · 10 km deep · 47 km away
  2. 4.9137 km SE of Pangai, Tonga · 3250 days ago · 10 km deep · 35 km away
  3. 4.682 km SSE of Pangai, Tonga · 3244 days ago · 10 km deep · 67 km away
  4. 4.6137 km SE of Pangai, Tonga · 3237 days ago · 10 km deep · 46 km away
  5. 4.7102 km ESE of Pangai, Tonga · 3235 days ago · 10 km deep · 25 km away
  6. 4.6100 km ESE of Pangai, Tonga · 3234 days ago · 10 km deep · 15 km away
  7. 5.0111 km SE of Pangai, Tonga · 3230 days ago · 10 km deep · 51 km away
  8. 5.0132 km SSE of Pangai, Tonga · 3230 days ago · 10 km deep · 72 km away
  9. 5.7130 km SSE of Pangai, Tonga · 3219 days ago · 7 km deep · 69 km away
  10. 4.7117 km SE of Pangai, Tonga · 3218 days ago · 10 km deep · 35 km away
  11. 4.9137 km SSE of Pangai, Tonga · 3218 days ago · 10 km deep · 68 km away
  12. 4.6132 km E of Pangai, Tonga · 3217 days ago · 26 km deep · 41 km away
  13. 4.9111 km SE of Pangai, Tonga · 3216 days ago · 10 km deep · 30 km away
  14. 5.387 km SSE of Pangai, Tonga · 3210 days ago · 10 km deep · 61 km away

Before

  1. 4.5105 km ESE of Pangai, Tonga · 3270 days ago · 10 km deep · 9 km away
  2. 4.4144 km E of Pangai, Tonga · 3270 days ago · 10 km deep · 71 km away
  3. 4.4133 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 52 km away
  4. 6.1103 km SE of Pangai, Tonga · 3273 days ago · 10 km deep · 54 km away · felt by 2
  5. 4.287 km SSE of Pangai, Tonga · 3293 days ago · 39 km deep · 70 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000axm4. Read Sun, Oct 4, 2026, 9:38 AM UTC.