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United States · Puerto Rico

M3.9 Earthquake near Puerto Rico (United States)

UTC time: 2026-10-03 10:35:36 UTC Local time: —

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About this earthquake

A magnitude M3.9 earthquake was recorded near Puerto Rico (United States) on October 3, 2026 at 10:35 UTC. The hypocenter lay relatively close to the surface at around 10 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: 162 earthquakes were recorded in the past 24 hours, the strongest reaching M4.1.

Details

ID
8ff6d5b97482c0f6d4d0da2f8ac87f80330cff61
Magnitude
M3.9
Depth
10.0 km
UTC time
2026-10-03 10:35:36 UTC
Local time
—
Country
United States
State
Puerto Rico
City
Puerto Rico
Source
usgs
Coordinates
18.48820, -67.48590
Temperature
28.8°C

Depth profile

Depth profile Depth: 10 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10 km
Shallow
10 km
10 km — shallower than the regional average (15.2 km)
Regional average: 15.2 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

Volcanoes nearby

  • Saba
    Distance: 460 km ·Stratovolcano ·Elevation: 887 m ·Last eruption: 1640 ·Netherlands
  • Quill, The
    Distance: 492 km ·Stratovolcano ·Elevation: 601 m ·Last eruption: 250 ·Netherlands

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Rafael Hernández International AirportPuerto Rico · BQN · TJBQ
    37.6 kmStraight-line distance
  • Eugenio Maria De Hostos AirportPuerto Rico · MAZ · TJMZ
    44.0 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-03

Nuclear power plants

  • Boiling Nuclear Superheater (BONUS) nuclear power plantPuerto RicoPermanently shut downReactor units at site: 1
    26.7 kmStraight-line distance

Source: Global Energy Monitor · Global Nuclear Power Tracker · Dataset date: 2026-08

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

03 Oct 2025 – 03 Oct 2026 · M ≥ 3.0 · 95 Catalogue entries

Of 94 other entries for this area and period, 1 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · United States

Open history map
Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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