QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near San Lorenzo, PR

No earthquake was likely felt in San Lorenzo in the 24 hours to 3:18 am AST (07:18 UTC). The last one was M 4.1, 71 km (44 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near San Lorenzo

This page: a magnitude 2.7 earthquake was recorded 3 km (2 mi) south-southeast of San Lorenzo, PR, at 11:15 pm AST on 30 August 2025 (03:15 UTC), 23 km deep. 1 person has reported feeling it to USGS.

USGS: 3 km SSE of San Lorenzo, Puerto Rico

29 km (18 mi) SSE of San Juan, PR · 12 km (7 mi) SE of Caguas, PR

11:15 pm AST, Aug 30, 2025 · · 23 km deep · released about 360 lb of TNT

Every earthquake near San Lorenzo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Lorenzo Municipio 3 kmJuncos Municipio 8 kmLas Piedras Municipio 9 kmCaguas Municipio 12 kmGurabo Municipio 13 kmYabucoa Municipio 15 kmHumacao Municipio 18 kmPatillas Municipio 18 kmMaunabo Municipio 19 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
11:15 pm AST on 30 August 2025 ()
Where
3 km (2 mi) south-southeast of San Lorenzo, PR · earthquakes near San Lorenzo
Magnitude
M 2.7 (md)
Depth
23 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Lorenzo Municipio, 3 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 438 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. In San Lorenzo, 3 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Jagual 4 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 360 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 42,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 30,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.6× the energy of this one
  4. This earthquake M 2.7 about 360 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 4.6 on 2016-12-05 — about 660 times the energy of this one.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 22 km WNW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.1627, -65.9542. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Lorenzo Municipio, PR 3 km (2 mi) SW earthquakes near San Lorenzo Municipio
Juncos Municipio, PR 8 km (5 mi) NE earthquakes near Juncos Municipio
Las Piedras Municipio, PR 9 km (6 mi) ENE earthquakes near Las Piedras Municipio
Caguas Municipio, PR 12 km (7 mi) WNW earthquakes near Caguas Municipio
Gurabo Municipio, PR 13 km (8 mi) NNW earthquakes near Gurabo Municipio
Yabucoa Municipio, PR 15 km (9 mi) SE earthquakes near Yabucoa Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

45 earthquakes have been recorded within 50 km since this one.

  1. 1.9 1 km ENE of Cayey, Puerto Rico
  2. 1.8 2 km E of Cayey, Puerto Rico
  3. 3.1 2 km NE of Bayamón, Puerto Rico
  4. 3.1 1 km SSE of Guaynabo, Puerto Rico
  5. 1.9 1 km E of Cayey, Puerto Rico
  6. 1.8 3 km NNE of Jobos, Puerto Rico
  7. 3.3 5 km NNE of Aguas Buenas, Puerto Rico
  8. 1.9 3 km E of G. L. Garcia, Puerto Rico
  9. 2.8 2 km NW of Levittown, Puerto Rico
  10. 2.0 9 km S of Emajagua, Puerto Rico
  11. 2.7 4 km ESE of Jagual, Puerto Rico
  12. 2.5 2 km SSW of Cayey, Puerto Rico
  13. 2.9 6 km NNW of Loíza, Puerto Rico
  14. 2.6 5 km NNW of Coamo, Puerto Rico
  15. 1.8 2 km NNW of La Plena, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.