QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Earthquake near Adjuntas, PR

No earthquake was likely felt in Adjuntas in the 24 hours to 12:56 pm AST (16:56 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 2.7 earthquake was recorded 4 km (2 mi) south of Adjuntas, PR, at 5:08 pm AST on 1 July 2022 (21:08 UTC), 19 km deep. 1 person has reported feeling it to USGS.

USGS: 3 km S of Adjuntas, Puerto Rico

18 km (11 mi) NW of Ponce, PR

5:08 pm AST, Jul 1, 2022 · · 19 km deep · released about 310 lb of TNT

Every earthquake near Adjuntas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Adjuntas Municipio 7 kmPeñuelas Municipio 11 kmYauco Municipio 16 kmUtuado Municipio 16 kmGuayanilla Municipio 16 kmJayuya Municipio 17 kmPonce Municipio 18 kmLares Municipio 23 kmMaricao 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
5:08 pm AST on 1 July 2022 ()
Where
4 km (2 mi) south of Adjuntas, PR · earthquakes near Adjuntas
Magnitude
M 2.7 (md)
Depth
19 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Adjuntas Municipio, 7 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1530 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 16 km (10 mi) from the epicentre. In Adjuntas, 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.

Likely felt in: Adjuntas 4 km, intensity II · Tallaboa Alta 9 km, intensity II · Magas Arriba 13 km, intensity II · Guayanilla 14 km, intensity II · Tallaboa 15 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 310 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 50,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 35,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.1× the energy of this one
  4. This earthquake M 2.7 about 310 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 6.4 on 2020-01-07 — about 390,000 times the energy of this one.

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

  1. 5.8 4 km E of Moca, Puerto Rico · 48 km NW 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 18.1288, -66.7183. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Adjuntas Municipio, PR 7 km (4 mi) NW earthquakes near Adjuntas Municipio
Peñuelas Municipio, PR 11 km (7 mi) S earthquakes near Peñuelas Municipio
Yauco Municipio, PR 16 km (10 mi) WSW earthquakes near Yauco Municipio
Utuado Municipio, PR 16 km (10 mi) N earthquakes near Utuado Municipio
Guayanilla Municipio, PR 16 km (10 mi) SSW earthquakes near Guayanilla Municipio
Jayuya Municipio, PR 17 km (10 mi) ENE earthquakes near Jayuya Municipio

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

Aftershocks so far

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

  1. 3.3 6 km SE of Maria Antonia, Puerto Rico
  2. 2.7 4 km ENE of Tierras Nuevas Poniente, Puerto Rico
  3. 2.1 3 km WSW of Indios, Puerto Rico
  4. 1.6 3 km E of La Parguera, Puerto Rico
  5. 2.0 6 km NNE of Lluveras, Puerto Rico
  6. 1.9 13 km SSE of Maria Antonia, Puerto Rico
  7. 2.2 2 km E of Magas Arriba, Puerto Rico
  8. 1.8 6 km WSW of Fuig, Puerto Rico
  9. 2.7 2 km ESE of Palomas, Puerto Rico
  10. 2.3 5 km SW of La Parguera, Puerto Rico
  11. 2.1 8 km N of Arecibo, Puerto Rico
  12. 2.3 Puerto Rico region
  13. 2.5 5 km WSW of Fuig, Puerto Rico
  14. 2.2 3 km SSW of Guánica, Puerto Rico
  15. 2.2 2 km S of Guánica, 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.