QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

Earthquake near Gurabo, PR

No earthquake was likely felt in Gurabo in the 24 hours to 4:44 pm AST (20:44 UTC). The last one was M 4.1, 75 km (47 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 Gurabo

This page: a magnitude 2.8 earthquake was recorded in Gurabo, PR, at 12:19 am AST on 31 May 2024 (04:19 UTC), 8.6 km deep.

USGS: 1 km ESE of Gurabo, Puerto Rico

21 km (13 mi) SSE of San Juan, PR · 9 km (6 mi) ENE of Caguas, PR

12:19 am AST, May 31, 2024 · · 8.6 km deep · released about 510 lb of TNT

Every earthquake near Gurabo Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Gurabo Municipio 4 kmJuncos Municipio 6 kmTrujillo Alto Municipio 11 kmCaguas Municipio 11 kmLas Piedras Municipio 11 kmCanóvanas Municipio 12 kmSan Lorenzo Municipio 12 kmCarolina Municipio 16 kmAguas Buenas Municipio 18 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
12:19 am AST on 31 May 2024 ()
Where
in Gurabo, PR · earthquakes near Gurabo
Magnitude
M 2.8 (md)
Depth
8.6 km below the surface
Felt
no reports yet
Nearest
Gurabo Municipio, 4 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 895 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 27 km (17 mi) from the epicentre. 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: Caguas 10 km, intensity III · Jagual 11 km, intensity III · Trujillo Alto 13 km, intensity II · Carolina 15 km, intensity II · Humacao 18 km, intensity II · Sumidero 19 km, intensity II · Río Grande 20 km, intensity II · Guaynabo 20 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 470 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 · 19 km W of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 49 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 18.2503, -65.9568. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Gurabo Municipio, PR 4 km (2 mi) NW earthquakes near Gurabo Municipio
Juncos Municipio, PR 6 km (4 mi) ESE earthquakes near Juncos Municipio
Trujillo Alto Municipio, PR 11 km (7 mi) NNW earthquakes near Trujillo Alto Municipio
Caguas Municipio, PR 11 km (7 mi) WSW earthquakes near Caguas Municipio
Las Piedras Municipio, PR 11 km (7 mi) SE earthquakes near Las Piedras Municipio
Canóvanas Municipio, PR 12 km (7 mi) NE earthquakes near Canóvanas Municipio

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

Aftershocks so far

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

  1. 2.8 1 km SE of Naranjito, Puerto Rico
  2. 2.3 10 km SSE of Lamboglia, Puerto Rico
  3. 2.1 7 km SSW of Corozal, Puerto Rico
  4. 2.7 5 km SSE of G. L. Garcia, Puerto Rico
  5. 2.6 1 km NW of El Negro, Puerto Rico
  6. 2.3 0 km ENE of Parcelas La Milagrosa, Puerto Rico
  7. 3.4 9 km NNE of San Juan, Puerto Rico
  8. 2.8 5 km SSE of Bajandas, Puerto Rico
  9. 3.2 14 km N of Dorado, Puerto Rico
  10. 2.1 4 km NW of Orocovis, Puerto Rico
  11. 2.2 6 km SSE of Bajandas, Puerto Rico
  12. 3.3 5 km SSE of Bajandas, Puerto Rico
  13. 3.2 0 km ENE of Cidra, Puerto Rico
  14. 2.2 2 km NW of Orocovis, Puerto Rico
  15. 3.0 6 km SSE of Bajandas, 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.