QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

Earthquake near Adjuntas, PR

No earthquake was likely felt in Adjuntas in the 24 hours to 2:35 am AST (06:35 UTC). The last one was M 3.0, 31 km (19 mi) SSW, at 3:45 am AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Adjuntas

This page: a magnitude 1.5 earthquake was recorded 8 km (5 mi) east-southeast of Adjuntas, PR, at 12:13 pm AST on 19 January 2019 (16:13 UTC), 8.0 km deep.

USGS: 7 km ESE of Adjuntas, Puerto Rico

16 km (10 mi) NNW of Ponce, PR

12:13 pm AST, Jan 19, 2019 · · 8.0 km deep · released about 5.4 lb of TNT

Every earthquake near Adjuntas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Jayuya Municipio 11 kmAdjuntas Municipio 12 kmPeñuelas Municipio 15 kmUtuado Municipio 16 kmPonce Municipio 16 kmVillalba Municipio 19 kmGuayanilla Municipio 21 kmYauco Municipio 22 kmCiales 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
12:13 pm AST on 19 January 2019 ()
Where
8 km (5 mi) east-southeast of Adjuntas, PR · earthquakes near Adjuntas
Magnitude
M 1.5 (md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Jayuya Municipio, 11 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2854 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 6 km (4 mi) from the epicentre. In Adjuntas, 8 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: Tallaboa Alta, Jayuya, Peñuelas, Santo Domingo, Ponce, Coto Laurel.

How big was it?

This earthquake released about 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.8 12 km N of Garrochales, Puerto Rico · 48 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 18.1373, -66.6530. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Jayuya Municipio, PR 11 km (7 mi) NE earthquakes near Jayuya Municipio
Adjuntas Municipio, PR 12 km (8 mi) WNW earthquakes near Adjuntas Municipio
Peñuelas Municipio, PR 15 km (9 mi) SSW earthquakes near Peñuelas Municipio
Utuado Municipio, PR 16 km (10 mi) NNW earthquakes near Utuado Municipio
Ponce Municipio, PR 16 km (10 mi) SSE earthquakes near Ponce Municipio
Villalba Municipio, PR 19 km (12 mi) E earthquakes near Villalba Municipio

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

Aftershocks so far

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

  1. 1.6 2 km WSW of Liborio Negron Torres, Puerto Rico
  2. 2.0 3 km WSW of Tallaboa, Puerto Rico
  3. 2.6 5 km SW of Sabana Grande, Puerto Rico
  4. 2.0 1 km WSW of Indios, Puerto Rico
  5. 1.8 7 km S of Indios, Puerto Rico
  6. 1.9 5 km NNW of Yauco, Puerto Rico
  7. 1.7 5 km SSW of Palmarejo, Puerto Rico
  8. 2.2 15 km SSE of La Parguera, Puerto Rico
  9. 2.7 2 km NW of Rafael Gonzalez, Puerto Rico
  10. 1.9 1 km SW of Indios, Puerto Rico
  11. 1.9 5 km NNW of Santo Domingo, Puerto Rico
  12. 2.3 4 km NW of Palomas, Puerto Rico
  13. 1.7 4 km E of Espino, Puerto Rico
  14. 2.3 6 km WSW of Las Marías, Puerto Rico
  15. 2.3 6 km NE of Villalba, 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.