Tonga earthquakes

M4.2 earthquake 128 km W of Hihifo, Tonga

A magnitude 4.2 earthquake struck 128 km W of Hihifo, Tonga on Mon, Sep 23, 2019, 2:02 AM GMT-12 (14:02 UTC), 298 km (185 mi) below the surface.

A larger quake followed: M4.5 73 km SW of Hihifo, Tonga. This one was a foreshock.

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The earthquake

Magnitude
4.2 (mb), light
Local time
UTC
2019-09-23 14:02:48 UTC
Depth
297.7 km (185.0 mi), intermediate-depth
Epicenter
16.063° S, 174.987° 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 13.3 km horizontally, 9.8 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
67°
Stations used
24

Nearby

Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.460 km SW of Hihifo, Tonga · 2561 days ago · 72 km deep · 99 km away
  2. 4.573 km SW of Hihifo, Tonga · 2561 days ago · 113 km deep · 75 km away
  3. 4.1225 km W of Hihifo, Tonga · 2527 days ago · 354 km deep · 97 km away
  4. 4.3144 km NW of Hihifo, Tonga · 2520 days ago · 231 km deep · 100 km away
  5. 4.3136 km SW of Hihifo, Tonga · 2520 days ago · 255 km deep · 82 km away
  6. 4.5138 km WNW of Hihifo, Tonga · 2507 days ago · 10 km deep · 65 km away

Before

  1. 4.977 km SW of Hihifo, Tonga · 2571 days ago · 193 km deep · 83 km away
  2. 4.5130 km WNW of Hihifo, Tonga · 2576 days ago · 286 km deep · 70 km away
  3. 4.7135 km WNW of Hihifo, Tonga · 2581 days ago · 10 km deep · 61 km away
  4. 4.3215 km WSW of Hihifo, Tonga · 2581 days ago · 320 km deep · 90 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70005pee. Read Thu, Oct 1, 2026, 2:14 AM UTC.