QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Rincón, PR

No earthquake was likely felt in Rincón in the 24 hours to 5:52 pm AST (21:52 UTC). The last one was M 3.4, 53 km (33 mi) NNE, at 9:00 pm AST on 27 October 2026, estimated intensity II (weak) in town. Every earthquake near Rincón

This page: a magnitude 2.4 earthquake was recorded 29 km (18 mi) northwest of Rincón, PR, at 1:22 am AST on 13 December 2018 (05:22 UTC), 21 km deep.

USGS: 28 km NW of Rincón, Puerto Rico

48 km (30 mi) NW of Mayagüez, PR · 147 km (91 mi) W of San Juan, PR

1:22 am AST, Dec 13, 2018 · · 21 km deep · released about 100 lb of TNT

Every earthquake near Rincón Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Rincón Municipio 29 kmAguada Municipio 32 kmAguadilla Municipio 32 kmMoca Municipio 42 kmAñasco Municipio 42 kmIsabela Municipio 46 kmSan Sebastián Municipio 55 kmHormigueros Municipio 55 kmQuebradillas 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
1:22 am AST on 13 December 2018 ()
Where
29 km (18 mi) northwest of Rincón, PR · earthquakes near Rincón
Magnitude
M 2.4 (md)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 29 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2891 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 Rincón, 29 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 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 24 km NNW of San Antonio, Puerto Rico · 34 km NE of this epicentre
  2. 6.4 32 km NW of Aguadilla, Puerto Rico · 13 km NNE of this epicentre
  3. 6.3 6 km WNW of Aguadilla, Puerto Rico · 26 km ESE of this epicentre
  4. 6.3 58 km E of Punta Cana, Dominican Republic · 43 km W of this epicentre
  5. 6.1 15 km WNW of San Antonio, Puerto Rico · 23 km E 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 18.5148, -67.4490. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Rincón Municipio, PR 29 km (18 mi) SE earthquakes near Rincón Municipio
Aguada Municipio, PR 32 km (20 mi) ESE earthquakes near Aguada Municipio
Aguadilla Municipio, PR 32 km (20 mi) E earthquakes near Aguadilla Municipio
Moca Municipio, PR 42 km (26 mi) ESE earthquakes near Moca Municipio
Añasco Municipio, PR 42 km (26 mi) SE earthquakes near Añasco Municipio
Isabela Municipio, PR 46 km (29 mi) E earthquakes near Isabela Municipio

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

Aftershocks so far

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

  1. 2.7 35 km WNW of San Antonio, Puerto Rico
  2. 2.0 9 km NW of Puerto Real, Puerto Rico
  3. 2.1 7 km NNW of Rincón, Puerto Rico
  4. 1.6 16 km WSW of Rincón, Puerto Rico
  5. 2.3 22 km NW of Rincón, Puerto Rico
  6. 2.9 49 km NW of Aguadilla, Puerto Rico
  7. 2.8 53 km NNW of San Antonio, Puerto Rico
  8. 2.8 47 km WSW of Stella, Puerto Rico
  9. 2.3 8 km WSW of Mayagüez, Puerto Rico
  10. 2.8 25 km NW of Rincón, Puerto Rico
  11. 2.3 45 km NW of Aguadilla, Puerto Rico
  12. 2.4 26 km N of San Antonio, Puerto Rico
  13. 2.8 21 km NW of San Antonio, Puerto Rico
  14. 2.3 7 km NNW of Puerto Real, Puerto Rico
  15. 2.5 37 km NNW of San Antonio, 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.