QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

0 km SSW of San Juan, Puerto Rico

· 82 km deep · released about 550 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cataño Municipio 5 kmSan Juan Municipio 6 kmToa Baja Municipio 9 kmGuaynabo Municipio 13 kmBayamón Municipio 14 kmCarolina Municipio 16 kmDorado Municipio 16 kmLoíza Municipio 17 kmTrujillo Alto Municipio 17 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
82 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Cataño Municipio, 5 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1269 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 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 18.4580, -66.1077. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cataño Municipio, PR 5 km (3 mi) ENE of here earthquakes near Cataño Municipio
San Juan Municipio, PR 6 km (4 mi) NW of here earthquakes near San Juan Municipio
Toa Baja Municipio, PR 9 km (6 mi) E of here earthquakes near Toa Baja Municipio
Guaynabo Municipio, PR 13 km (8 mi) N of here earthquakes near Guaynabo Municipio
Bayamón Municipio, PR 14 km (9 mi) NNE of here earthquakes near Bayamón Municipio
Carolina Municipio, PR 16 km (10 mi) WNW of here earthquakes near Carolina Municipio

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

Aftershocks so far

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

  1. 3.3 Puerto Rico region
  2. 2.9 8 km NNW of Coamo, Puerto Rico
  3. 3.0 1 km E of Jagual, Puerto Rico
  4. 2.4 8 km S of Orocovis, Puerto Rico
  5. 2.9 Puerto Rico region
  6. 3.3 8 km S of Orocovis, Puerto Rico
  7. 3.0 22 km N of San Juan, Puerto Rico
  8. 2.7 2 km E of Santa Clara, Puerto Rico
  9. 3.1 37 km N of Suárez, Puerto Rico
  10. 3.0 1 km ENE of Bayamon, Puerto Rico
  11. 3.3 7 km NNW of Brenas, Puerto Rico
  12. 3.2 1 km NE of Bajandas, Puerto Rico
  13. 3.1 4 km WNW of Santa Clara, Puerto Rico
  14. 2.0 1 km NE of La Plena, Puerto Rico
  15. 3.0 3 km NE of La Plena, 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 4.4 on 2018-12-09 — it released about 220 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.