Tonga earthquakes

M4.5 earthquake Tonga

A magnitude 4.5 earthquake struck in Tonga on Thu, Oct 20, 2022, 2:14 PM GMT-12 (02:14 UTC), 147 km (91 mi) below the surface.

A larger quake followed: M5.0 Tonga. This one was a foreshock.

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The earthquake

Magnitude: 4.5 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Thu, Oct 20, 2022, 2:14 PM GMT-12
UTC: 2022-10-21 02:14:57 UTC
Depth: 147.1 km (91.4 mi), intermediate-depth
Epicenter: 16.723° S, 174.271° 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 11.3 km horizontally, 8.9 km in depth
Magnitude uncertainty: ±0.20
Depth from: From location
Station coverage gap: 110°
Stations used: 18

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 3 in the 30 days before it.

After

Before

Earthquakes today Tonga earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000iwef. Read Fri, Oct 2, 2026, 11:28 AM UTC.