QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

22 km N of San Juan, Puerto Rico

· 75 km deep · released about 1,100 lb of TNT

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10 km30 km60 km120 km N Cataño Municipio 26 kmToa Baja Municipio 26 kmSan Juan Municipio 27 kmLoíza Municipio 28 kmDorado Municipio 29 kmCarolina Municipio 32 kmGuaynabo Municipio 36 kmBayamón Municipio 36 kmTrujillo Alto Municipio 37 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
Magnitude
M 3.0 (md)
Depth
75 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Cataño Municipio, 26 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1173 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

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 6.7 310,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 9,800× 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.

Where

Epicentre 18.6638, -66.0737. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 26 km (16 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 26 km (16 mi) NNE of here earthquakes near Toa Baja Municipio
San Juan Municipio, PR 27 km (17 mi) N of here earthquakes near San Juan Municipio
Loíza Municipio, PR 28 km (17 mi) NNW of here earthquakes near Loíza Municipio
Dorado Municipio, PR 29 km (18 mi) NE of here earthquakes near Dorado Municipio
Carolina Municipio, PR 32 km (20 mi) NNW of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 3.2 2 km SSE of Coto Norte, Puerto Rico
  2. 3.0 1 km SSE of Corozal, Puerto Rico
  3. 2.9 4 km NNW of Santa Barbara, Puerto Rico
  4. 2.9 42 km N of San Juan, Puerto Rico
  5. 3.1 37 km N of San Juan, Puerto Rico
  6. 3.2 63 km N of San Juan, Puerto Rico
  7. 3.5 0 km SSW of Bayamón, Puerto Rico
  8. 2.5 7 km ESE of Naranjito, Puerto Rico
  9. 3.0 49 km N of Brenas, Puerto Rico
  10. 3.0 Puerto Rico region
  11. 2.5 17 km NNW of Brenas, Puerto Rico
  12. 3.1 Puerto Rico region
  13. 3.0 53 km N of Loíza, Puerto Rico
  14. 2.5 39 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.3 Puerto Rico region

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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2017-08-18 — it released about 440 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.