QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

1 km ENE of Dorado, Puerto Rico

· 99 km deep · released about 2.8 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 1 kmToa Baja Municipio 7 kmVega Alta Municipio 9 kmToa Alta Municipio 11 kmCataño Municipio 12 kmVega Baja Municipio 15 kmBayamón Municipio 16 kmCorozal Municipio 19 kmNaranjito Municipio 19 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 3.5 (md)
Depth
99 km below the surface
Felt
2 reports · strongest reported intensity IV
Measured shaking
intensity II (ShakeMap)
Nearest
Dorado Municipio, 1 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1790 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.8 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 61,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,700× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,900× the energy of this one
  4. This earthquake M 3.5 about 2.8 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.8× more

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 18.4628, -66.2571. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 1 km (1 mi) SSE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 7 km (4 mi) W of here earthquakes near Toa Baja Municipio
Vega Alta Municipio, PR 9 km (6 mi) ENE of here earthquakes near Vega Alta Municipio
Toa Alta Municipio, PR 11 km (7 mi) N of here earthquakes near Toa Alta Municipio
Cataño Municipio, PR 12 km (7 mi) W of here earthquakes near Cataño Municipio
Vega Baja Municipio, PR 15 km (9 mi) E of here earthquakes near Vega Baja Municipio

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

Aftershocks so far

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

  1. 3.6 2 km ESE of Pájaros, Puerto Rico
  2. 3.3 1 km SW of Cayey, Puerto Rico
  3. 2.8 1 km SSW of Cayey, Puerto Rico
  4. 3.0 2 km SW of Canovanas, Puerto Rico
  5. 2.0 5 km S of Morovis, Puerto Rico
  6. 2.7 0 km NW of Aguas Buenas, Puerto Rico
  7. 2.7 2 km W of Pastos, Puerto Rico
  8. 2.8 12 km N of San Juan, Puerto Rico
  9. 2.9 0 km WNW of Aguas Buenas, Puerto Rico
  10. 3.1 13 km N of Levittown, Puerto Rico
  11. 3.0 35 km N of Tierras Nuevas Poniente, Puerto Rico
  12. 2.8 5 km SSE of Corozal, Puerto Rico
  13. 3.2 3 km S of Guaynabo, Puerto Rico
  14. 2.5 3 km S of Barranquitas, Puerto Rico
  15. 3.2 38 km N of San Juan, 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 22 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.