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M3.1 Depth: 9.5 km

M3.1 Earthquake near 3 km SSW of Guánica, Puerto Rico (United States)

UTC time: 2025-07-21 00:43:18 UTC Local time: —

About this earthquake

A magnitude M3.1 earthquake was recorded near 3 km SSW of Guánica, Puerto Rico (United States) on July 21, 2025 at 00:43 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: 209 earthquakes were recorded in the past 24 hours, the strongest reaching M3.2.

Details

Magnitude
M3.1
Depth
9.5 km
UTC time
2025-07-21 00:43:18 UTC
Local time
—
Country
United States
City
Puerto Rico
Source
usgs
Coordinates
17.94633, -66.92083
Temperature
26.2°C

Map

Depth profile

Depth profile Depth: 9.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9.5 km
Shallow
9.5 km
9.5 km — shallower than 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

Volcanoes nearby

  • Saba
    Distance: 392 km ·Stratovolcano ·Elevation: 887 m ·Last eruption: 1640 ·Netherlands
  • Quill, The
    Distance: 423 km ·Stratovolcano ·Elevation: 601 m ·Last eruption: 250 ·Netherlands
  • Liamuiga
    Distance: 441 km ·Stratovolcano ·Elevation: 1'156 m ·Last eruption: 160 ·Saint Kitts and Nevis
  • Nevis Peak
    Distance: 469 km ·Stratovolcano ·Elevation: 985 m ·Saint Kitts and Nevis

Historic earthquake map · United States

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Country statistics · United States

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