Tonga earthquakes

M4.1 earthquake 280 km W of Haveluloto, Tonga

A magnitude 4.1 earthquake struck 280 km W of Haveluloto, Tonga on Tue, Mar 23, 2021, 2:28 PM GMT+13 (01:28 UTC), 487 km (303 mi) below the surface.

A larger quake followed: M6.5 207 km WSW of Haveluloto, Tonga. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
4.1 (mb), light
Local time
UTC
2021-03-23 01:28:48 UTC
Depth
487.1 km (302.7 mi), deep
Epicenter
21.081° S, 177.914° 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 21.8 km horizontally, 12.5 km in depth
Magnitude uncertainty
±0.20
Depth from
From location
Station coverage gap
170°
Stations used
12

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 12 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dxws. Read Mon, Sep 28, 2026, 2:03 PM UTC.