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M3.5 Depth: 12.0 km

M3.5 Earthquake near Boca, Puerto Rico (United States)

UTC time: 2026-07-28 17:59:13 UTC Local time: —

About this earthquake

On July 28, 2026 at 17:59 UTC, a magnitude M3.5 earthquake occurred near Boca, Puerto Rico (United States). The hypocenter lay relatively close to the surface at around 12 km, increasing how strongly it was felt. Shaking of this size is frequently noticed but usually harmless.

The data is provided by USGS and cross-checked across seismological networks. United States: 159 earthquakes were recorded in the past 24 hours, the strongest reaching M3.5.

Details

Magnitude
M3.5
Depth
12.0 km
UTC time
2026-07-28 17:59:13 UTC
Local time
—
Country
United States
State
Puerto Rico
City
Boca
County
Guayanilla
Source
usgs
Coordinates
17.95680, -66.84100
Temperature
31.7°C

Map

Depth profile

Depth profile Depth: 12 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 12 km
Shallow
12 km
12 km — shallower than the regional average (15.5 km)
Regional average: 15.5 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: 384 km ·Stratovolcano ·Elevation: 887 m ·Last eruption: 1640 ·Netherlands
  • Quill, The
    Distance: 415 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: 461 km ·Stratovolcano ·Elevation: 985 m ·Saint Kitts and Nevis

Historic earthquake map · United States

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Country statistics · United States

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

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