Tonga earthquakes

M4.5 earthquake Tonga

A magnitude 4.5 earthquake struck in Tonga on Thu, Apr 23, 2015, 5:57 AM GMT-12 (17:57 UTC), 38 km (23 mi) below the surface.

A larger quake followed: M4.6 140 km N of Neiafu, Tonga. This one was a foreshock.

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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
2015-04-23 17:57:29 UTC
Depth
37.8 km (23.5 mi), shallow
Epicenter
16.887° S, 174.274° 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 8.6 km horizontally, 10.4 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
141°
Stations used
16

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 5 in the 30 days before it.

After

  1. 4.6140 km N of Neiafu, Tonga · 4179 days ago · 92 km deep · 57 km away
  2. 4.247 km SSW of Hihifo, Tonga · 4172 days ago · 192 km deep · 67 km away
  3. 4.451 km S of Hihifo, Tonga · 4167 days ago · 67 km deep · 72 km away
  4. 4.3115 km SW of Hihifo, Tonga · 4166 days ago · 309 km deep · 47 km away
  5. 4.2102 km SSW of Hihifo, Tonga · 4140 days ago · 83 km deep · 17 km away
  6. 4.184 km SW of Hihifo, Tonga · 4130 days ago · 129 km deep · 54 km away

Before

  1. 4.5143 km SSW of Hihifo, Tonga · 4183 days ago · 277 km deep · 30 km away
  2. 4.6104 km SSE of Hihifo, Tonga · 4184 days ago · 89 km deep · 77 km away
  3. 4.689 km S of Hihifo, Tonga · 4186 days ago · 10 km deep · 67 km away
  4. 4.281 km SW of Hihifo, Tonga · 4199 days ago · 139 km deep · 56 km away · felt by 1
  5. 4.6113 km N of Neiafu, Tonga · 4202 days ago · 82 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20002a6k. Read Mon, Oct 5, 2026, 7:38 AM UTC.