QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

Earthquake near Las Marias, PR

No earthquake was likely felt in Las Marias in the 24 hours to 10:47 am AST (14:47 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 2.0 earthquake was recorded 4 km (3 mi) north-northwest of Las Marias, PR, at 7:12 pm AST on 23 March 2019 (23:12 UTC), 20 km deep.

USGS: 4 km NNW of Las Marias, Puerto Rico

14 km (9 mi) N of Mayagüez, PR · 116 km (72 mi) W of San Juan, PR

7:12 pm AST, Mar 23, 2019 · · 20 km deep · released about 36 lb of TNT

Every earthquake near Las Marias Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Añasco Municipio 5 kmAguada Municipio 6 kmRincón Municipio 10 kmMoca Municipio 10 kmAguadilla Municipio 17 kmSan Sebastián Municipio 20 kmHormigueros Municipio 22 kmLas Marías Municipio 22 kmIsabela Municipio 23 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
7:12 pm AST on 23 March 2019 ()
Where
4 km (3 mi) north-northwest of Las Marias, PR · earthquakes near Las Marias
Magnitude
M 2.0 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 5 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2789 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 Las Marias, 4 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: Luyando, La Playa, Añasco, Aguada, Espino, Moca.

How big was it?

This earthquake released about 36 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 420,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 300,000× the energy of this one
  3. Around the size people start to feel M 3.0 27× the energy of this one
  4. This earthquake M 2.0 about 36 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 4.3 on 2017-10-14 — about 2,400 times the energy of this one.

Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 24 km NNW of San Antonio, Puerto Rico · 42 km N of this epicentre
  2. 6.4 32 km NW of Aguadilla, Puerto Rico · 40 km NW of this epicentre
  3. 6.3 6 km WNW of Aguadilla, Puerto Rico · 14 km NNW of this epicentre
  4. 6.1 15 km WNW of San Antonio, Puerto Rico · 26 km NNW of this epicentre
  5. 6.1 18 km NNW of San Antonio, Puerto Rico · 34 km N 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 18.3275, -67.1606. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Añasco Municipio, PR 5 km (3 mi) SE earthquakes near Añasco Municipio
Aguada Municipio, PR 6 km (4 mi) NNW earthquakes near Aguada Municipio
Rincón Municipio, PR 10 km (6 mi) W earthquakes near Rincón Municipio
Moca Municipio, PR 10 km (6 mi) ENE earthquakes near Moca Municipio
Aguadilla Municipio, PR 17 km (11 mi) N earthquakes near Aguadilla Municipio
San Sebastián Municipio, PR 20 km (13 mi) E earthquakes near San Sebastián 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. 2.0 25 km NNE of Isabela, Puerto Rico
  2. 1.9 6 km NNW of Santo Domingo, Puerto Rico
  3. 1.7 11 km NE of Sabana Grande, Puerto Rico
  4. 2.0 4 km SSE of Espino, Puerto Rico
  5. 1.5 3 km NNE of Mayagüez, Puerto Rico
  6. 2.0 12 km NNW of Hatillo, Puerto Rico
  7. 1.9 4 km NNW of Sabana Grande, Puerto Rico
  8. 1.8 9 km WNW of Puerto Real, Puerto Rico
  9. 2.4 36 km NW of San Antonio, Puerto Rico
  10. 1.9 20 km NW of Rincón, Puerto Rico
  11. 2.4 Puerto Rico region
  12. 2.1 3 km NW of Quebradillas, Puerto Rico
  13. 1.6 3 km SSE of Mayagüez, Puerto Rico
  14. 1.9 1 km ENE of Hormigueros, Puerto Rico
  15. 2.7 19 km N of Isabela, 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.