Tonga earthquakes

M4.5 earthquake 162 km SW of Hihifo, Tonga

A magnitude 4.5 earthquake struck 162 km SW of Hihifo, Tonga on Mon, Oct 11, 2021, 4:49 AM GMT-12 (16:49 UTC), 197 km (123 mi) below the surface.

A larger quake followed: M5.0 121 km S of Hihifo, Tonga. This one was a foreshock.

More in Tonga

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude
4.5 (mb), light
Local time
UTC
2021-10-11 16:49:15 UTC
Depth
197.5 km (122.7 mi), intermediate-depth
Epicenter
17.144° S, 174.691° 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 6.8 km horizontally, 7.5 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
67°
Stations used
38

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 4 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 us6000fts2. Read Wed, Sep 30, 2026, 6:15 AM UTC.