M6.4 Depth: 10.0 km

M6.4 Earthquake near Pacific-Antarctic Ridge

UTC time: 2025-08-03 04:57:10 UTC Local time: —

About this earthquake

A magnitude M6.4 earthquake was recorded near Pacific-Antarctic Ridge on August 3, 2025 at 04:57 UTC. The hypocenter lay relatively close to the surface at around 10 km, increasing how strongly it was felt. Events of this size are considered strong and can be dangerous in inhabited regions.

The data is provided by USGS and cross-checked across seismological networks.

Details

Magnitude

M6.4

Depth

10.0 km

UTC time

2025-08-03 04:57:10 UTC

Local time

—

Country

—

Source

usgs

Coordinates

-55.24840, -128.57420

Temperature

4.9°C

Map

Depth profile

Shallow

10 km

Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Subsequent earthquakes nearby

Events recorded after this earthquake within 250 km. They are not automatically classified as aftershocks.

First 6 hours3

First 24 hours3

First 72 hours3

Strongest subsequent eventM6.4

M6.42025-08-03 04:57:11 UTC12.2 kmPACIFIC-ANTARCTIC RIDGE M6.02025-08-03 04:57:12 UTC17.4 kmPacific-Antarctic Ridge M6.42025-08-03 04:57:31 UTC0.0 kmPacific-Antarctic Ridge M5.22025-08-06 17:32:59 UTC14.3 kmPacific-Antarctic Ridge

Historical context nearby

Comparison with recorded earthquakes before this event within 250 km.

Magnitude rank#1

Earlier events M≥43

Earlier events M≥52

Compared since2025-03-30

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M5.92025-08-03 02:26:19 UTC81.8 kmPacific-Antarctic Ridge M5.22025-08-03 02:26:17 UTC59.0 kmPACIFIC-ANTARCTIC RIDGE M4.52025-03-30 11:48:45 UTC143.1 kmPacific-Antarctic Ridge

Stats (last 24h)

Global (24h)

685

Country (24h)

—

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