QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

19 km NNE of San Juan, Puerto Rico

· 69 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cataño Municipio 23 kmSan Juan Municipio 23 kmLoíza Municipio 24 kmToa Baja Municipio 24 kmCarolina Municipio 28 kmDorado Municipio 28 kmGuaynabo Municipio 33 kmTrujillo Alto Municipio 33 kmBayamón Municipio 34 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 2.8 (md)
Depth
69 km below the surface
Felt
no reports yet
Nearest
Cataño Municipio, 23 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 665 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 550 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 28,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.8 about 550 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 18.6312, -66.0533. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 23 km (14 mi) NNE of here earthquakes near Cataño Municipio
San Juan Municipio, PR 23 km (14 mi) N of here earthquakes near San Juan Municipio
Loíza Municipio, PR 24 km (15 mi) NNW of here earthquakes near Loíza Municipio
Toa Baja Municipio, PR 24 km (15 mi) NE of here earthquakes near Toa Baja Municipio
Carolina Municipio, PR 28 km (17 mi) NNW of here earthquakes near Carolina Municipio
Dorado Municipio, PR 28 km (17 mi) NE of here earthquakes near Dorado 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. 3.4 24 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 3.0 50 km N of Loíza, Puerto Rico
  3. 3.0 52 km N of Loíza, Puerto Rico
  4. 2.6 3 km ESE of Cataño, Puerto Rico
  5. 3.1 1 km S of Campanilla, Puerto Rico
  6. 3.3 68 km N of San Juan, Puerto Rico
  7. 3.0 5 km NNW of Dorado, Puerto Rico
  8. 2.8 47 km N of Brenas, Puerto Rico
  9. 3.0 42 km N of San Juan, Puerto Rico
  10. 2.8 25 km N of Tierras Nuevas Poniente, Puerto Rico
  11. 2.7 27 km NNW of Brenas, Puerto Rico
  12. 3.0 12 km NNW of San Juan, Puerto Rico
  13. 2.8 53 km NNW of San Juan, Puerto Rico
  14. 3.1 2 km NW of Hato Candal, Puerto Rico
  15. 3.0 3 km NW of H. Rivera Colon, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.8 on 2017-08-18 — it released about 870 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.