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M3.9 Earthquake near The Valley, Anguilla — 29 August 2025

A minor earthquake of magnitude 3.9 was recorded near The Valley, Anguilla on , with an epicentre 173 km north-northwest of The Valley, at a focal depth of 46.0 km. It was the strongest of the 1 earthquakes recorded in Anguilla in the preceding 30 days.

3.9 Minor

Time (UTC): 2025-08-29 02:04:22

Time (your timezone): —

Magnitude: 3.9 (minor)

Focal depth: 46.0 km (shallow)

Epicentre: 19.7178, -63.5350

Location: 173 km NNW of The Valley, Anguilla

Country: Anguilla

USGS link to NOAA tsunami information: Not linked

Review status: Reviewed

Source: USGS event page

How strong was this earthquake?

Minor earthquakes in this range are felt by people close to the epicentre as a brief jolt or rattle, but they very rarely cause any damage.

A magnitude 3.9 earthquake radiates roughly 9.0 tons of TNT equivalent in seismic energy.

The USGS assigns this earthquake a significance score of 228, which is below the USGS threshold of more than 600 for its significant-earthquake list. The ranking combines magnitude with available Did You Feel It responses and PAGER alert level; it is not a direct measurement of damage.

What the magnitude scale actually measures →

When it happened locally

That is about 21:50 local solar time at the epicentre, late at night.

This event was deeper than 79% of the 47 earthquakes recorded in Anguilla in our catalogue and stronger than 49% of them.

Where was the epicentre?

The epicentre was located at 19.7178, -63.5350 — 173 km north-northwest of The Valley. The closest other recorded event was a magnitude 3.1 earthquake 123 km west of here on 21 August 2026.

The nearest other settlements in our records are Blowing Point Village (202 km south-southeast) and Charlotte Amalie (241 km southwest).

Why the 46 km depth matters

At 46 km this was a shallow earthquake. Shallow events release their energy close to the surface, so for a given magnitude they produce noticeably stronger shaking — and more damage — than deeper ones. Roughly three quarters of all earthquakes worldwide occur at shallow depths.

This catalogue does not ingest eyewitness responses, so it cannot confirm where this earthquake was felt. Based on magnitude alone, an event this size may be noticed locally, especially close to the epicentre. Its shallow focus makes stronger surface shaking more likely than for a deeper event of the same magnitude.

Read more on how focal depth changes what you feel →

What does the tsunami information flag mean?

The USGS record does not carry a link to NOAA tsunami information. That field is not an all-clear and does not state whether a tsunami occurred. In this case, a damaging tsunami would be less likely because at M3.9 it falls below the magnitude 6.5 threshold that generally applies before a submarine earthquake displaces enough water to generate a damaging tsunami; it occurred inland rather than beneath the sea floor. For an active coastal alert, use tsunami.gov or your local warning authority.

How earthquakes generate tsunamis, and what the alert levels mean →

Aftershocks and local seismic history

16 further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event, the largest of them magnitude 4.1.

64 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 5.6 event near Cruz Bay on 04 May 2025. This M3.9 event released about 468 times less energy than that event.

30 earthquakes have been recorded within 100 km of this epicentre in the past year, 2 of them in the past 30 days.

How long aftershock sequences last, and how large they get →

Where this event sits in the record

This earthquake is part of the August 2025 worldwide record, and of earthquakes in Anguilla during August 2025. Browse the full monthly archive to compare periods.

Nearest recorded earthquakes to this epicentre

Other recent earthquakes in Anguilla

All recorded earthquakes in Anguilla →

Other magnitude 3 earthquakes worldwide

All magnitude 3 earthquakes →

Questions about this earthquake

How strong was the earthquake near The Valley?

It measured magnitude 3.9 — a minor earthquake. A magnitude 3.9 earthquake radiates roughly 9.0 tons of TNT equivalent in seismic energy.

How deep was the earthquake near The Valley?

The focus was 46 km below the surface, which counts as shallow.

Was the The Valley earthquake felt at the surface?

At magnitude 3.9 and a focal depth of 46 km, shaking would have been concentrated near the epicentre.

When did the earthquake near The Valley happen?

29 August 2025 at 02:04 UTC.

Was there a tsunami?

No. The USGS record carries no tsunami-information link for this event.

Have there been aftershocks?

16 further earthquakes have been recorded within about 150 km of the epicentre in the seven days after this event, the largest of them magnitude 4.1.

How often do earthquakes happen near The Valley?

64 earthquakes of magnitude 4 or above have been logged within roughly 200 km of this epicentre in our catalogue. The strongest was a magnitude 5.6 event near Cruz Bay on 04 May 2025. This M3.9 event released about 468 times less energy than that event.