Tonga earthquakes

M4.3 earthquake 112 km SSW of Hihifo, Tonga

A magnitude 4.3 earthquake struck 112 km SSW of Hihifo, Tonga on Tue, Jul 28, 2020, 7:32 AM GMT-12 (19:32 UTC), 135 km (84 mi) below the surface.

A larger quake followed: M5.2 148 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
4.3 (mb), light
Local time
UTC
2020-07-28 19:32:04 UTC
Depth
135.0 km (83.9 mi), intermediate-depth
Epicenter
16.954° S, 174.003° 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 8.1 km horizontally, 14.7 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
129°
Stations used
19

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 5.0100 km SSE of Hihifo, Tonga · 2254 days ago · 13 km deep · 60 km away
  2. 4.550 km SW of Hihifo, Tonga · 2251 days ago · 116 km deep · 85 km away
  3. 5.2148 km N of Neiafu, Tonga · 2250 days ago · 92 km deep · 50 km away
  4. 4.5141 km SSW of Hihifo, Tonga · 2250 days ago · 151 km deep · 42 km away
  5. 4.678 km SSW of Hihifo, Tonga · 2243 days ago · 81 km deep · 37 km away
  6. 4.6153 km NNE of Neiafu, Tonga · 2225 days ago · 10 km deep · 68 km away
  7. 4.546 km SSW of Hihifo, Tonga · 2218 days ago · 59 km deep · 70 km away
  8. 4.5145 km N of Neiafu, Tonga · 2215 days ago · 74 km deep · 43 km away
  9. 4.485 km SE of Hihifo, Tonga · 2210 days ago · 79 km deep · 89 km away
  10. 4.4143 km SSW of Hihifo, Tonga · 2205 days ago · 131 km deep · 37 km away
  11. 4.462 km SSW of Hihifo, Tonga · 2200 days ago · 77 km deep · 57 km away
  12. 4.4138 km SW of Hihifo, Tonga · 2197 days ago · 213 km deep · 65 km away

Before

  1. 5.1144 km S of Hihifo, Tonga · 2273 days ago · 10 km deep · 33 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000b8sf. Read Wed, Sep 30, 2026, 11:54 PM UTC.