Tonga earthquakes

M4.3 earthquake 150 km WSW of Hihifo, Tonga

A magnitude 4.3 earthquake struck 150 km WSW of Hihifo, Tonga on Fri, Oct 5, 2018, 11:22 AM GMT-12 (23:22 UTC), 332 km (206 mi) below the surface.

A larger quake followed: M5.4 86 km SW of Hihifo, Tonga. This one was a foreshock.

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The earthquake

Magnitude
4.3 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2018-10-05 23:22:37 UTC
Depth
331.9 km (206.3 mi), deep
Epicenter
16.394° S, 175.123° 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 13.2 km horizontally, 10.1 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
127°
Stations used
39

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. 4.2232 km WSW of Hihifo, Tonga · 2916 days ago · 296 km deep · 89 km away
  2. 4.0201 km WSW of Hihifo, Tonga · 2913 days ago · 332 km deep · 59 km away
  3. 4.480 km WSW of Hihifo, Tonga · 2906 days ago · 108 km deep · 71 km away
  4. 5.486 km SW of Hihifo, Tonga · 2899 days ago · 200 km deep · 88 km away
  5. 4.5115 km WNW of Hihifo, Tonga · 2897 days ago · 262 km deep · 96 km away
  6. 4.4142 km WNW of Hihifo, Tonga · 2890 days ago · 317 km deep · 97 km away

Before

  1. 4.3208 km W of Hihifo, Tonga · 2924 days ago · 339 km deep · 72 km away
  2. 4.9Tonga · 2931 days ago · 10 km deep · 74 km away
  3. 4.6104 km SSW of Hihifo, Tonga · 2932 days ago · 10 km deep · 98 km away
  4. 4.0179 km SW of Hihifo, Tonga · 2933 days ago · 267 km deep · 76 km away
  5. 4.5150 km WNW of Hihifo, Tonga · 2941 days ago · 247 km deep · 85 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hany. Read Fri, Oct 2, 2026, 9:44 PM UTC.