QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near G. L. Garcia, PR

No earthquake was likely felt in G. L. Garcia in the 24 hours to 5:26 pm AST (21:26 UTC). The last one was M 3.3, 44 km (27 mi) SW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near G. L. Garcia

This page: a magnitude 1.7 earthquake was recorded 4 km (2 mi) east-southeast of G. L. Garcia, PR, at 9:03 am AST on 5 June 2018 (13:03 UTC), 31 km deep.

USGS: 3 km ESE of G. L. Garcia, Puerto Rico

14 km (9 mi) SSW of Caguas, PR · 33 km (20 mi) S of San Juan, PR

9:03 am AST, Jun 5, 2018 · · 31 km deep · released about 11 lb of TNT

Every earthquake near G. L. Garcia Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 8 kmSan Lorenzo Municipio 11 kmCaguas Municipio 12 kmCidra Municipio 12 kmPatillas Municipio 15 kmArroyo Municipio 16 kmGuayama Municipio 17 kmAguas Buenas Municipio 17 kmComerío Municipio 20 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
9:03 am AST on 5 June 2018 ()
Where
4 km (2 mi) east-southeast of G. L. Garcia, PR · earthquakes near G. L. Garcia
Magnitude
M 1.7 (md)
Depth
31 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3081 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 G. L. Garcia, 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: Yaurel, Cayey, Jagual, Parcelas Nuevas, Cidra, Olimpo.

How big was it?

This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× the energy of this one
  4. This earthquake M 1.7 about 11 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 4.6 on 2016-12-05 — about 22,000 times the energy of this one.

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

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 18 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 18.1100, -66.0740. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Cayey Municipio, PR 8 km (5 mi) W earthquakes near Cayey Municipio
San Lorenzo Municipio, PR 11 km (7 mi) ENE earthquakes near San Lorenzo Municipio
Caguas Municipio, PR 12 km (7 mi) NNE earthquakes near Caguas Municipio
Cidra Municipio, PR 12 km (7 mi) NW earthquakes near Cidra Municipio
Patillas Municipio, PR 15 km (10 mi) SE earthquakes near Patillas Municipio
Arroyo Municipio, PR 16 km (10 mi) SSE earthquakes near Arroyo Municipio

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

Aftershocks so far

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

  1. 3.0 4 km ESE of Bayamon, Puerto Rico
  2. 2.6 3 km SSE of Guaynabo, Puerto Rico
  3. 2.3 9 km SSW of Emajagua, Puerto Rico
  4. 2.0 11 km S of Emajagua, Puerto Rico
  5. 2.5 10 km SSW of Emajagua, Puerto Rico
  6. 2.8 3 km NNE of Naranjito, Puerto Rico
  7. 2.0 1 km NE of Sabana Seca, Puerto Rico
  8. 2.9 5 km SE of Cataño, Puerto Rico
  9. 2.1 7 km E of Naranjito, Puerto Rico
  10. 1.5 2 km N of Coquí, Puerto Rico
  11. 2.2 2 km NNE of Coquí, Puerto Rico
  12. 2.0 1 km W of Guayabal, Puerto Rico
  13. 2.1 2 km E of Juana Díaz, Puerto Rico
  14. 2.3 2 km SW of Bajandas, Puerto Rico
  15. 2.1 7 km S of Emajagua, 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.