QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

Earthquake near Santa Clara, PR

No earthquake was likely felt in Santa Clara in the 24 hours to 10:48 am AST (14:48 UTC). The last one was M 3.3, 49 km (30 mi) SW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near Santa Clara

This page: a magnitude 3.1 earthquake was recorded 4 km (3 mi) west-northwest of Santa Clara, PR, at 9:13 am AST on 26 June 2023 (13:13 UTC), 76 km deep.

USGS: 4 km WNW of Santa Clara, Puerto Rico

23 km (14 mi) SSW of San Juan, PR · 14 km (9 mi) W of Caguas, PR

9:13 am AST, Jun 26, 2023 · · 76 km deep · released about 1,400 lb of TNT

Every earthquake near Santa Clara Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Comerío Municipio 5 kmAguas Buenas Municipio 6 kmCidra Municipio 6 kmNaranjito Municipio 11 kmCaguas Municipio 13 kmBayamón Municipio 13 kmCayey Municipio 14 kmGuaynabo Municipio 14 kmAibonito Municipio 15 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
9:13 am AST on 26 June 2023 ()
Where
4 km (3 mi) west-northwest of Santa Clara, PR · earthquakes near Santa Clara
Magnitude
M 3.1 (md)
Depth
76 km below the surface
Felt
no reports yet
Nearest
Comerío Municipio, 5 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1234 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 it was probably too small to be felt, even directly above it. In Santa Clara, 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.

Earthquakes near other towns within 30 km: Sumidero, Comerío, Cidra, Parcelas La Milagrosa, Aguas Buenas, Parcelas Nuevas.

How big was it?

This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 230,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 10,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 7,400× the energy of this one
  4. This earthquake M 3.1 about 1,400 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.5× more

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 4.6 on 2016-12-05 — about 170 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 5 km NE of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 35 km NNW 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 18.2282, -66.1713. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Comerío Municipio, PR 5 km (3 mi) W earthquakes near Comerío Municipio
Aguas Buenas Municipio, PR 6 km (3 mi) NE earthquakes near Aguas Buenas Municipio
Cidra Municipio, PR 6 km (4 mi) S earthquakes near Cidra Municipio
Naranjito Municipio, PR 11 km (7 mi) NW earthquakes near Naranjito Municipio
Caguas Municipio, PR 13 km (8 mi) E earthquakes near Caguas Municipio
Bayamón Municipio, PR 13 km (8 mi) N earthquakes near Bayamón Municipio

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

Aftershocks so far

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

  1. 3.1 10 km S of Lamboglia, Puerto Rico
  2. 2.3 3 km S of Las Ochenta, Puerto Rico
  3. 2.4 4 km WSW of Central Aguirre, Puerto Rico
  4. 2.5 Puerto Rico region
  5. 2.7 4 km S of Salinas, Puerto Rico
  6. 2.3 4 km SSE of Salinas, Puerto Rico
  7. 1.9 Puerto Rico region
  8. 3.3 Puerto Rico region
  9. 2.4 15 km SSE of Central Aguirre, Puerto Rico
  10. 2.4 15 km S of Central Aguirre, Puerto Rico
  11. 2.7 12 km S of Central Aguirre, Puerto Rico
  12. 2.6 18 km S of Jobos, Puerto Rico
  13. 2.5 Puerto Rico region
  14. 3.0 18 km S of Central Aguirre, Puerto Rico
  15. 2.7 16 km S of Central Aguirre, 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.