QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Earthquake near Carolina, PR

No earthquake was likely felt in Carolina in the 24 hours to 11:29 am AST (15:29 UTC). The last one was M 4.1, 81 km (50 mi) SE, at 5:44 am AST on 28 October 2026, estimated intensity II (weak) in town; 5 felt reports to USGS. Every earthquake near Carolina

This page: a magnitude 3.0 earthquake was recorded 44 km (27 mi) northeast of Carolina, PR, at 12:36 pm AST on 28 May 2024 (16:36 UTC), 89 km deep. 1 person has reported feeling it to USGS.

USGS: 31 km NE of Vieques, Puerto Rico

51 km (32 mi) ENE of San Juan, PR · 44 km (27 mi) NE of Carolina, PR

12:36 pm AST, May 28, 2024 · · 89 km deep · released about 1,100 lb of TNT

Every earthquake near Carolina Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fajardo Municipio 30 kmLuquillo Municipio 32 kmRío Grande Municipio 34 kmLoíza Municipio 38 kmCanóvanas Municipio 43 kmCarolina Municipio 44 kmCeiba Municipio 44 kmNaguabo Municipio 50 kmSan Juan Municipio 51 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
12:36 pm AST on 28 May 2024 ()
Where
44 km (27 mi) northeast of Carolina, PR · earthquakes near Carolina
Magnitude
M 3.0 (md)
Depth
89 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Fajardo Municipio, 30 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 897 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 Carolina, 44 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.

How big was it?

This earthquake released about 1,100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 300,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,400× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 4.8 on 2021-03-09 — about 420 times the energy of this one.

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

  1. 5.0 73 km NNE of Vieques, Puerto Rico · 42 km NNE 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 18.6497, -65.6510. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Fajardo Municipio, PR 30 km (19 mi) SSE earthquakes near Fajardo Municipio
Luquillo Municipio, PR 32 km (20 mi) S earthquakes near Luquillo Municipio
Río Grande Municipio, PR 34 km (21 mi) SSW earthquakes near Río Grande Municipio
Loíza Municipio, PR 38 km (24 mi) SW earthquakes near Loíza Municipio
Canóvanas Municipio, PR 43 km (27 mi) SW earthquakes near Canóvanas Municipio
Carolina Municipio, PR 44 km (27 mi) SW earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 2.9 53 km NNE of Luquillo, Puerto Rico
  2. 3.2 9 km NNE of San Juan, Puerto Rico
  3. 2.9 44 km NNE of Luquillo, Puerto Rico
  4. 3.0 37 km N of Culebra, Puerto Rico
  5. 3.2 67 km N of Culebra, Puerto Rico
  6. 3.0 56 km NNE of Luquillo, Puerto Rico
  7. 2.7 56 km NNE of Luquillo, Puerto Rico
  8. 3.3 72 km N of Culebra, Puerto Rico
  9. 3.3 7 km ESE of San Juan, Puerto Rico
  10. 3.0 73 km N of Culebra, Puerto Rico
  11. 3.4 53 km N of Culebra, Puerto Rico
  12. 3.4 42 km NNW of Culebra, Puerto Rico
  13. 3.7 51 km N of Culebra, Puerto Rico
  14. 3.2 34 km NNE of San Juan, Puerto Rico
  15. 3.3 79 km N of Culebra, 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.