QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

Earthquake near Las Marias, PR

No earthquake was likely felt in Las Marias in the 24 hours to 10:03 pm AST (02:03 UTC). The last one was M 3.5, 12 km (8 mi) NNE, at 12:03 am AST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Las Marias

This page: a magnitude 3.2 earthquake was recorded 23 km (14 mi) east-southeast of Las Marias, PR, at 1:06 am AST on 24 September 2024 (05:06 UTC), 14 km deep. 1 person has reported feeling it to USGS.

USGS: 6 km ESE of Las Marías, Puerto Rico

94 km (58 mi) WSW of San Juan, PR · 22 km (14 mi) E of Mayagüez, PR

1:06 am AST, Sep 24, 2024 · · 14 km deep · released about 1,700 lb of TNT

Every earthquake near Las Marias Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Las Marías Municipio 5 kmMaricao Municipio 7 kmLares Municipio 8 kmSan Sebastián Municipio 11 kmSabana Grande Municipio 17 kmSan Germán Municipio 18 kmYauco Municipio 19 kmAdjuntas Municipio 20 kmAñasco Municipio 21 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
1:06 am AST on 24 September 2024 ()
Where
23 km (14 mi) east-southeast of Las Marias, PR · earthquakes near Las Marias
Magnitude
M 3.2 (md)
Depth
14 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Las Marías Municipio, 5 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 774 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 43 km (27 mi) from the epicentre. In Las Marias, 23 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: Lares 9 km, intensity III · San Sebastián 13 km, intensity III · San Germán 21 km, intensity II · Mayagüez 22 km, intensity II · Adjuntas 24 km, intensity II · Yauco 24 km, intensity II · Quebradillas 26 km, intensity II · Guayanilla 28 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× more

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 6.4 on 2020-01-07 — about 70,000 times the energy of this one.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 37 km NW of this epicentre
  2. 6.1 15 km WNW of San Antonio, Puerto Rico · 47 km NW of this epicentre
  3. 5.8 4 km E of Moca, Puerto Rico · 23 km NW of this epicentre
  4. 5.2 19 km SW of Stella, Puerto Rico · 46 km W of this epicentre
  5. 5.1 21 km SW of Stella, Puerto Rico · 47 km W 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 18.2357, -66.9350. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Las Marías Municipio, PR 5 km (3 mi) WSW earthquakes near Las Marías Municipio
Maricao Municipio, PR 7 km (4 mi) S earthquakes near Maricao Municipio
Lares Municipio, PR 8 km (5 mi) ENE earthquakes near Lares Municipio
San Sebastián Municipio, PR 11 km (7 mi) NNW earthquakes near San Sebastián Municipio
Sabana Grande Municipio, PR 17 km (10 mi) S earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 18 km (11 mi) SW earthquakes near San Germán 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. 3.1 5 km E of La Parguera, Puerto Rico
  2. 2.6 2 km SSW of Indios, Puerto Rico
  3. 2.7 3 km SSW of Indios, Puerto Rico
  4. 2.9 6 km WSW of Fuig, Puerto Rico
  5. 2.4 1 km S of Maria Antonia, Puerto Rico
  6. 3.0 19 km NNW of Camuy, Puerto Rico
  7. 3.0 6 km NNE of San Germán, Puerto Rico
  8. 2.5 5 km S of Indios, Puerto Rico
  9. 2.5 1 km SSW of Indios, Puerto Rico
  10. 3.0 1 km SSW of Indios, Puerto Rico
  11. 2.6 1 km SW of Indios, Puerto Rico
  12. 2.6 3 km SSW of Indios, Puerto Rico
  13. 2.6 3 km SSW of Indios, Puerto Rico
  14. 3.6 9 km SSE of Guánica, Puerto Rico
  15. 2.9 1 km WSW of Indios, 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.