QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Earthquake near Guaynabo, PR

No earthquake was likely felt in Guaynabo in the 24 hours to 12:59 pm AST (16:59 UTC). The last one was M 4.1, 93 km (58 mi) ESE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Guaynabo

This page: a magnitude 2.5 earthquake was recorded 5 km (3 mi) north-northeast of Guaynabo, PR, at 7:11 am AST on 16 June 2018 (11:11 UTC), 108 km deep.

USGS: 4 km NNE of Guaynabo, Puerto Rico

in San Juan, PR

7:11 am AST, Jun 16, 2018 · · 108 km deep · released about 190 lb of TNT

Every earthquake near Guaynabo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Juan Municipio 4 kmGuaynabo Municipio 6 kmCataño Municipio 7 kmBayamón Municipio 9 kmToa Baja Municipio 12 kmTrujillo Alto Municipio 12 kmCarolina Municipio 14 kmToa Alta Municipio 16 kmAguas Buenas Municipio 16 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
7:11 am AST on 16 June 2018 ()
Where
5 km (3 mi) north-northeast of Guaynabo, PR · earthquakes near Guaynabo
Magnitude
M 2.5 (md)
Depth
108 km below the surface
Felt
no reports yet
Nearest
San Juan Municipio, 4 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3070 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 Guaynabo, 5 km away, the estimate is intensity I (not felt). 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: Eleanor Roosevelt, Cataño, Bayamón, San Juan, Sabana Seca, Levittown.

How big was it?

This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 78,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 55,000× the energy of this one
  3. Around the size people start to feel M 3.0 4.9× the energy of this one
  4. This earthquake M 2.5 about 190 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 lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 16 km SSW of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 28 km WNW 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 18.3971, -66.0985. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Juan Municipio, PR 4 km (3 mi) NE earthquakes near San Juan Municipio
Guaynabo Municipio, PR 6 km (4 mi) SSW earthquakes near Guaynabo Municipio
Cataño Municipio, PR 7 km (5 mi) NW earthquakes near Cataño Municipio
Bayamón Municipio, PR 9 km (6 mi) SW earthquakes near Bayamón Municipio
Toa Baja Municipio, PR 12 km (7 mi) WNW earthquakes near Toa Baja Municipio
Trujillo Alto Municipio, PR 12 km (8 mi) SE earthquakes near Trujillo Alto Municipio

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

Aftershocks so far

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

  1. 2.3 36 km N of Dorado, Puerto Rico
  2. 2.1 0 km NE of Ciales, Puerto Rico
  3. 2.2 2 km ESE of Parcelas Nuevas, Puerto Rico
  4. 2.3 1 km WSW of Campo Rico, Puerto Rico
  5. 2.8 4 km NNW of Sabana, Puerto Rico
  6. 2.8 1 km NW of Naranjito, Puerto Rico
  7. 2.5 2 km ESE of Vega Alta, Puerto Rico
  8. 1.7 8 km S of Villalba, Puerto Rico
  9. 2.7 4 km ESE of Florida, Puerto Rico
  10. 2.7 24 km NNE of Vieques, Puerto Rico
  11. 3.0 4 km ESE of Bayamon, Puerto Rico
  12. 2.6 3 km SSE of Guaynabo, Puerto Rico
  13. 2.8 3 km NNE of Naranjito, Puerto Rico
  14. 2.0 1 km NE of Sabana Seca, Puerto Rico
  15. 2.9 5 km SE of Cataño, 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.