Tonga earthquakes

M4.5 earthquake 116 km SE of Pangai, Tonga

A magnitude 4.5 earthquake struck 116 km SE of Pangai, Tonga on Wed, Aug 2, 2017, 1:09 AM GMT+13 (12:09 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.4 111 km E 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
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-08-01 12:09:43 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
20.518° S, 173.529° 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 5.2 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
140°
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 10 in the 30 days before it.

After

  1. 5.4111 km E of Pangai, Tonga · 3348 days ago · 10 km deep · 71 km away · felt by 1
  2. 5.0121 km ESE of Pangai, Tonga · 3343 days ago · 10 km deep · 60 km away
  3. 4.4125 km E of Pangai, Tonga · 3338 days ago · 10 km deep · 97 km away
  4. 4.9Tonga · 3338 days ago · 10 km deep · 22 km away
  5. 4.7151 km ESE of Pangai, Tonga · 3327 days ago · 10 km deep · 57 km away
  6. 4.6135 km ESE of Pangai, Tonga · 3317 days ago · 10 km deep · 53 km away
  7. 4.334 km E of Pangai, Tonga · 3310 days ago · 35 km deep · 99 km away
  8. 4.8112 km ESE of Pangai, Tonga · 3309 days ago · 10 km deep · 48 km away
  9. 4.5119 km E of Pangai, Tonga · 3304 days ago · 10 km deep · 82 km away
  10. 4.447 km ESE of Pangai, Tonga · 3302 days ago · 10 km deep · 72 km away
  11. 4.287 km SSE of Pangai, Tonga · 3293 days ago · 39 km deep · 50 km away

Before

  1. 4.787 km SE of Pangai, Tonga · 3359 days ago · 10 km deep · 28 km away
  2. 5.087 km ESE of Pangai, Tonga · 3359 days ago · 10 km deep · 47 km away
  3. 4.493 km ESE of Pangai, Tonga · 3362 days ago · 10 km deep · 34 km away
  4. 4.9101 km ENE of ‘Ohonua, Tonga · 3364 days ago · 10 km deep · 72 km away
  5. 5.7119 km ESE of Pangai, Tonga · 3366 days ago · 7 km deep · 23 km away
  6. 5.6112 km ESE of Pangai, Tonga · 3367 days ago · 16 km deep · 17 km away
  7. 4.6108 km ESE of Pangai, Tonga · 3369 days ago · 10 km deep · 40 km away
  8. 4.9111 km ESE of Pangai, Tonga · 3375 days ago · 10 km deep · 48 km away
  9. 5.176 km ENE of Kolonga, Tonga · 3377 days ago · 35 km deep · 97 km away
  10. 4.4132 km ESE of Pangai, Tonga · 3381 days ago · 35 km deep · 24 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000a5jx. Read Sun, Oct 4, 2026, 8:03 AM UTC.