QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Lamboglia, PR

No earthquake was likely felt in Lamboglia in the 24 hours to 10:47 am AST (14:47 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 2.4 earthquake was recorded 21 km (13 mi) south of Lamboglia, PR, at 7:01 pm AST on 12 September 2019 (23:01 UTC), 12 km deep.

USGS: 21 km S of Lamboglia, Puerto Rico

69 km (43 mi) S of San Juan, PR · 50 km (31 mi) S of Caguas, PR

7:01 pm AST, Sep 12, 2019 · · 12 km deep · released about 100 lb of TNT

Every earthquake near Lamboglia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Arroyo Municipio 22 kmPatillas Municipio 24 kmMaunabo Municipio 24 kmGuayama Municipio 28 kmYabucoa Municipio 31 kmSalinas Municipio 39 kmSan Lorenzo Municipio 40 kmCayey Municipio 41 kmHumacao Municipio 42 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
7:01 pm AST on 12 September 2019 ()
Where
21 km (13 mi) south of Lamboglia, PR · earthquakes near Lamboglia
Magnitude
M 2.4 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Arroyo Municipio, 22 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2616 days ago

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

At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. In Lamboglia, 21 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: Arroyo, Palmas, Palo Seco, Emajagua, Maunabo, Patillas.

How big was it?

This earthquake released about 100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 150,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.4× the energy of this one
  4. This earthquake M 2.4 about 100 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 2,400 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 17.7915, -65.9506. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Arroyo Municipio, PR 22 km (14 mi) NNW earthquakes near Arroyo Municipio
Patillas Municipio, PR 24 km (15 mi) N earthquakes near Patillas Municipio
Maunabo Municipio, PR 24 km (15 mi) NNE earthquakes near Maunabo Municipio
Guayama Municipio, PR 28 km (18 mi) NW earthquakes near Guayama Municipio
Yabucoa Municipio, PR 31 km (19 mi) NNE earthquakes near Yabucoa Municipio
Salinas Municipio, PR 39 km (24 mi) WNW earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 1.8 2 km SSW of Las Ochenta, Puerto Rico
  2. 2.0 4 km SE of Salinas, Puerto Rico
  3. 1.6 3 km SSW of Las Ochenta, Puerto Rico
  4. 1.6 2 km ENE of Salinas, Puerto Rico
  5. 1.6 3 km SSW of Las Ochenta, Puerto Rico
  6. 1.8 2 km SW of Las Ochenta, Puerto Rico
  7. 2.1 3 km SSW of Las Ochenta, Puerto Rico
  8. 2.3 4 km SSW of Las Ochenta, Puerto Rico
  9. 1.6 3 km SSW of Las Ochenta, Puerto Rico
  10. 1.6 2 km E of Jauca, Puerto Rico
  11. 2.8 5 km SE of Jauca, Puerto Rico
  12. 1.6 2 km SSW of Las Ochenta, Puerto Rico
  13. 1.7 2 km E of Jauca, Puerto Rico
  14. 1.7 Puerto Rico region
  15. 1.6 4 km S of Salinas, 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.