QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Lamboglia, PR

No earthquake was likely felt in Lamboglia in the 24 hours to 4:42 pm AST (20:42 UTC). The last one was M 3.3, 47 km (29 mi) WSW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near Lamboglia

This page: a magnitude 1.6 earthquake was recorded 7 km (4 mi) south of Lamboglia, PR, at 4:56 pm AST on 30 September 2025 (20:56 UTC), 13 km deep.

USGS: 6 km SSE of Lamboglia, Puerto Rico

55 km (34 mi) S of San Juan, PR · 35 km (22 mi) SSE of Caguas, PR

4:56 pm AST, Sep 30, 2025 · · 13 km deep · released about 6.4 lb of TNT

Every earthquake near Lamboglia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Patillas Municipio 9 kmArroyo Municipio 9 kmMaunabo Municipio 12 kmGuayama Municipio 18 kmYabucoa Municipio 20 kmSan Lorenzo Municipio 25 kmCayey Municipio 28 kmHumacao Municipio 31 kmSalinas Municipio 31 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
4:56 pm AST on 30 September 2025 ()
Where
7 km (4 mi) south of Lamboglia, PR · earthquakes near Lamboglia
Magnitude
M 1.6 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Patillas Municipio, 9 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 407 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Lamboglia, 7 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.

Earthquakes near other towns within 30 km: Palmas, Palo Seco, Patillas, Arroyo, Buena Vista, Maunabo.

How big was it?

This earthquake released about 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 38,000 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 · 41 km NNW 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 17.9210, -65.9732. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Patillas Municipio, PR 9 km (6 mi) N earthquakes near Patillas Municipio
Arroyo Municipio, PR 9 km (6 mi) NW earthquakes near Arroyo Municipio
Maunabo Municipio, PR 12 km (7 mi) NE earthquakes near Maunabo Municipio
Guayama Municipio, PR 18 km (11 mi) WNW earthquakes near Guayama Municipio
Yabucoa Municipio, PR 20 km (12 mi) NE earthquakes near Yabucoa Municipio
San Lorenzo Municipio, PR 25 km (16 mi) N earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 1.6 1 km SW of G. L. Garcia, Puerto Rico
  2. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  3. 2.4 3 km SSE of Salinas, Puerto Rico
  4. 1.7 1 km WSW of G. L. Garcia, Puerto Rico
  5. 2.0 1 km SSE of Cidra, Puerto Rico
  6. 2.4 1 km WSW of Las Ochenta, Puerto Rico
  7. 1.9 3 km SSW of Salinas, Puerto Rico
  8. 3.1 30 km SE of Emajagua, Puerto Rico
  9. 3.0 19 km WSW of Esperanza, Puerto Rico
  10. 2.0 4 km WNW of Yaurel, Puerto Rico
  11. 3.1 9 km SSE of Daguao, Puerto Rico
  12. 2.6 2 km SW of Campo Rico, Puerto Rico
  13. 1.9 4 km SE of Jagual, Puerto Rico
  14. 2.9 29 km SSW of Esperanza, Puerto Rico
  15. 2.6 5 km NNW of Aguas Buenas, 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.