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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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

Before

Earthquakes todayTonga earthquakesLive radar here

Sources

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