QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Palomas, PR

No earthquake was likely felt in Palomas in the 24 hours to 10:52 am AST (14:52 UTC). The last one was M 2.1, 9 km (5 mi) E, at 4:39 pm AST on 9 November 2026, estimated intensity II (weak) in town. Every earthquake near Palomas

This page: a magnitude 2.4 earthquake was recorded 3 km (2 mi) south-southeast of Palomas, PR, at 1:03 am AST on 11 July 2021 (05:03 UTC), 15 km deep.

USGS: 2 km SSE of Palomas, Puerto Rico

25 km (15 mi) W of Ponce, PR

1:03 am AST, Jul 11, 2021 · · 15 km deep · released about 120 lb of TNT

Every earthquake near Palomas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 7 kmGuánica Municipio 8 kmYauco Municipio 11 kmSabana Grande Municipio 14 kmPeñuelas Municipio 14 kmLajas Municipio 19 kmMaricao Municipio 22 kmSan Germán Municipio 23 kmAdjuntas Municipio 24 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
1:03 am AST on 11 July 2021 ()
Where
3 km (2 mi) south-southeast of Palomas, PR · earthquakes near Palomas
Magnitude
M 2.4 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 7 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1949 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 15 km (9 mi) from the epicentre. In Palomas, 3 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: Yauco 5 km, intensity II · Guayanilla 8 km, intensity II · Magas Arriba 10 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 120 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 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 86,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.7× the energy of this one
  4. This earthquake M 2.4 about 120 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 970,000 times the energy of this one.

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 17.9910, -66.8593. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Guayanilla Municipio, PR 7 km (4 mi) ENE earthquakes near Guayanilla Municipio
Guánica Municipio, PR 8 km (5 mi) SW earthquakes near Guánica Municipio
Yauco Municipio, PR 11 km (7 mi) N earthquakes near Yauco Municipio
Sabana Grande Municipio, PR 14 km (9 mi) NW earthquakes near Sabana Grande Municipio
Peñuelas Municipio, PR 14 km (9 mi) ENE earthquakes near Peñuelas Municipio
Lajas Municipio, PR 19 km (12 mi) W earthquakes near Lajas Municipio

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

Aftershocks so far

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

  1. 2.5 Puerto Rico region
  2. 3.2 5 km SSE of Guánica, Puerto Rico
  3. 2.4 4 km SW of La Parguera, Puerto Rico
  4. 2.8 6 km WSW of La Parguera, Puerto Rico
  5. 2.6 5 km WSW of La Parguera, Puerto Rico
  6. 2.3 6 km SE of Maria Antonia, Puerto Rico
  7. 3.0 6 km W of La Parguera, Puerto Rico
  8. 2.8 6 km WSW of La Parguera, Puerto Rico
  9. 3.1 6 km SW of La Parguera, Puerto Rico
  10. 2.8 6 km WSW of La Parguera, Puerto Rico
  11. 4.3 5 km WSW of La Parguera, Puerto Rico
  12. 3.4 7 km WSW of La Parguera, Puerto Rico
  13. 2.6 5 km SW of La Parguera, Puerto Rico
  14. 2.5 5 km SW of La Parguera, Puerto Rico
  15. 2.3 7 km WSW of La Parguera, 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.