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United States · Puerto Rico

M2.3 Earthquake near Montalva, Puerto Rico (United States)

UTC time: 2026-09-18 17:37:28 UTC Local time: —

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About this earthquake

A magnitude M2.3 earthquake was recorded near Montalva, Puerto Rico (United States) on September 18, 2026 at 17:37 UTC. With a focal depth of about 7 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this small magnitude are usually barely noticeable and cause no damage.

The event was recorded by USGS. United States: 191 earthquakes were recorded in the past 24 hours, the strongest reaching M3.0.

Details

ID
f9cfac23fe1e2517df256d4ba6e23981e8050233
Magnitude
M2.3
Depth
6.7 km
UTC time
2026-09-18 17:37:28 UTC
Local time
—
Country
United States
State
Puerto Rico
City
Montalva
County
Guánica
Source
usgs
Coordinates
17.95367, -66.96550
Temperature
30.7°C

Depth profile

Depth profile Depth: 6.7 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 6.7 km
Shallow
6.7 km
6.7 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: 397 km ·Stratovolcano ·Elevation: 887 m ·Last eruption: 1640 ·Netherlands
  • Quill, The
    Distance: 428 km ·Stratovolcano ·Elevation: 601 m ·Last eruption: 250 ·Netherlands
  • Liamuiga
    Distance: 446 km ·Stratovolcano ·Elevation: 1'156 m ·Last eruption: 160 ·Saint Kitts and Nevis
  • Nevis Peak
    Distance: 473 km ·Stratovolcano ·Elevation: 985 m ·Saint Kitts and Nevis

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

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

Source: OurAirports · Dataset date: 2026-09-21

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

21 Sep 2025 – 21 Sep 2026 · M ≥ 2.0 · 897 Catalogue entries

Of 896 other entries for this area and period, 538 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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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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