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 12:41 am AST (04:41 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 6 km (4 mi) southeast of Adjuntas, PR, at 9:08 pm AST on 7 May 2019 (01:08 UTC), 22 km deep.

USGS: 5 km SE of Adjuntas, Puerto Rico

15 km (10 mi) NNW of Ponce, PR

9:08 pm AST, May 7, 2019 · · 22 km deep · released about 5.7 lb of TNT

Every earthquake near Adjuntas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Adjuntas Municipio 10 kmPeñuelas Municipio 11 kmJayuya Municipio 15 kmPonce Municipio 16 kmUtuado Municipio 17 kmGuayanilla Municipio 17 kmYauco Municipio 18 kmVillalba Municipio 23 kmJuana Díaz Municipio 25 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
9:08 pm AST on 7 May 2019 ()
Where
6 km (4 mi) southeast of Adjuntas, PR · earthquakes near Adjuntas
Magnitude
M 1.5 (md)
Depth
22 km below the surface
Felt
no reports yet
Nearest
Adjuntas Municipio, 10 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2745 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 Adjuntas, 6 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, Peñuelas, Santo Domingo, Ponce, Magas Arriba, Tallaboa.

How big was it?

This earthquake released about 5.7 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 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 since 1900 lists no earthquake of M5 or more within 50 km.

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 18.1220, -66.6903. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Adjuntas Municipio, PR 10 km (6 mi) NW earthquakes near Adjuntas Municipio
Peñuelas Municipio, PR 11 km (7 mi) SSW earthquakes near Peñuelas Municipio
Jayuya Municipio, PR 15 km (9 mi) NE earthquakes near Jayuya Municipio
Ponce Municipio, PR 16 km (10 mi) SSE earthquakes near Ponce Municipio
Utuado Municipio, PR 17 km (10 mi) N earthquakes near Utuado Municipio
Guayanilla Municipio, PR 17 km (11 mi) SW earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 1.9 14 km S of La Parguera, Puerto Rico
  2. 2.0 18 km S of Guánica, Puerto Rico
  3. 1.6 2 km NNW of Lluveras, Puerto Rico
  4. 2.3 9 km ESE of Maricao, Puerto Rico
  5. 1.5 15 km SSW of Potala Pastillo, Puerto Rico
  6. 1.9 14 km SW of Potala Pastillo, Puerto Rico
  7. 1.8 2 km ESE of Potala Pastillo, Puerto Rico
  8. 2.6 3 km WSW of Ciales, Puerto Rico
  9. 1.5 3 km NE of Río Cañas Abajo, Puerto Rico
  10. 1.8 4 km SW of Juncal, Puerto Rico
  11. 1.6 8 km NE of Sabana Grande, Puerto Rico
  12. 1.8 6 km ESE of Jayuya, Puerto Rico
  13. 1.9 6 km NW of Villalba, Puerto Rico
  14. 1.6 2 km WSW of Jauca, Puerto Rico
  15. 1.9 4 km SSW of Adjuntas, 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.