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United States · Puerto Rico

M3.9 Earthquake near Boca, Puerto Rico (United States)

UTC time: 2026-07-08 20:07:32 UTC Local time: —

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About this earthquake

On July 8, 2026 at 20:07 UTC, a magnitude M3.9 earthquake occurred near Boca, Puerto Rico (United States). The hypocenter lay relatively close to the surface at around 15 km, increasing how strongly it was felt. Shaking of this size is frequently noticed but usually harmless.

The event was recorded by USGS. United States: 148 earthquakes were recorded in the past 24 hours, the strongest reaching M4.0.

Details

ID
f8116cbf5dd8e47c7cee480e9e2a14561cb7dec0
Magnitude
M3.9
Depth
15.0 km
UTC time
2026-07-08 20:07:32 UTC
Local time
—
Country
United States
State
Puerto Rico
City
Boca
County
Guayanilla
Source
usgs
Coordinates
17.97780, -66.83510
Temperature
30.2°C

Depth profile

Depth profile Depth: 15 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 15 km
Shallow
15 km
15 km — close to the regional average (15.3 km)
Regional average: 15.3 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

Felt reports

6felt reports at EMSC / LastQuake

Voluntary reports of feeling this earthquake. The count is not an intensity measurement and is not added to USGS DYFI reports.

Data updated: Jul 9, 2026, 7:07 AM UTC · Last checked: Sep 6, 2026, 12:18 PM UTC

Source: EMSC / LastQuake

Volcanoes nearby

  • Saba
    Distance: 384 km ·Stratovolcano ·Elevation: 887 m ·Last eruption: 1640 ·Netherlands
  • Quill, The
    Distance: 414 km ·Stratovolcano ·Elevation: 601 m ·Last eruption: 250 ·Netherlands
  • Liamuiga
    Distance: 433 km ·Stratovolcano ·Elevation: 1'156 m ·Last eruption: 160 ·Saint Kitts and Nevis
  • Nevis Peak
    Distance: 460 km ·Stratovolcano ·Elevation: 985 m ·Saint Kitts and Nevis

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Mercedita International AirportPuerto Rico · PSE · TJPS
    29.0 kmStraight-line distance
  • Eugenio Maria De Hostos AirportPuerto Rico · MAZ · TJMZ
    45.3 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-06

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Puerto Rico

Context for this earthquake

06 Sep 2025 – 06 Sep 2026 · M ≥ 3.0 · 89 Catalogue entries

Of 88 other entries for this area and period, 0 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · United States

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Country statistics · United States

Country overview
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