QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Mayagüez, PR

No earthquake was likely felt in Mayagüez in the 24 hours to 12:52 am AST (04:52 UTC). The last one was M 2.9, 25 km (15 mi) SSE, at 3:17 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Mayagüez

This page: a magnitude 2.4 earthquake was recorded 42 km (26 mi) west-southwest of Mayagüez, PR, at 10:03 pm AST on 12 October 2019 (02:03 UTC), 20 km deep.

USGS: 37 km W of Puerto Real, Puerto Rico

97 km (60 mi) W of Ponce, PR · 42 km (26 mi) WSW of Mayagüez, PR

10:03 pm AST, Oct 12, 2019 · · 20 km deep · released about 100 lb of TNT

Every earthquake near Mayagüez Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 38 kmRincón Municipio 38 kmCabo Rojo Municipio 40 kmHormigueros Municipio 44 kmAguada Municipio 46 kmAñasco Municipio 46 kmSan Germán Municipio 52 kmLajas Municipio 55 kmMoca Municipio 55 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
10:03 pm AST on 12 October 2019 ()
Where
42 km (26 mi) west-southwest of Mayagüez, PR · earthquakes near Mayagüez
Magnitude
M 2.4 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 38 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2587 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 4 km (2 mi) from the epicentre. In Mayagüez, 42 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.

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 4.4 on 2017-10-01 — about 1,200 times the energy of this one.

Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:

  1. 6.3 6 km WNW of Aguadilla, Puerto Rico · 49 km NE of this epicentre
  2. 5.2 19 km SW of Stella, Puerto Rico · 19 km ENE of this epicentre
  3. 5.1 21 km SW of Stella, Puerto Rico · 18 km ENE 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 18.1260, -67.5331. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mayagüez Municipio, PR 38 km (23 mi) W earthquakes near Mayagüez Municipio
Rincón Municipio, PR 38 km (24 mi) NE earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 40 km (25 mi) ESE earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 44 km (27 mi) E earthquakes near Hormigueros Municipio
Aguada Municipio, PR 46 km (29 mi) NE earthquakes near Aguada Municipio
Añasco Municipio, PR 46 km (29 mi) ENE earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.5 23 km SW of Stella, Puerto Rico
  2. 1.9 4 km ENE of Hormigueros, Puerto Rico
  3. 2.3 30 km W of Rincón, Puerto Rico
  4. 1.8 4 km NW of Cabo Rojo, Puerto Rico
  5. 2.3 3 km WNW of Hormigueros, Puerto Rico
  6. 2.1 30 km NW of Rincón, Puerto Rico
  7. 2.5 4 km NW of Puerto Real, Puerto Rico
  8. 1.9 15 km W of Puerto Real, Puerto Rico
  9. 2.1 4 km WNW of La Parguera, Puerto Rico
  10. 1.5 5 km NW of Puerto Real, Puerto Rico
  11. 2.4 56 km W of Stella, Puerto Rico
  12. 1.6 9 km SE of Pole Ojea, Puerto Rico
  13. 1.6 0 km E of Palmarejo, Puerto Rico
  14. 2.7 22 km NW of Rincón, Puerto Rico
  15. 1.9 4 km E of Hormigueros, 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.