QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km W of Garrochales, Puerto Rico

· 17 km deep · released about 41 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 4 kmArecibo Municipio 10 kmFlorida Municipio 10 kmManatí Municipio 10 kmCiales Municipio 19 kmVega Baja Municipio 20 kmHatillo Municipio 22 kmMorovis Municipio 23 kmUtuado Municipio 24 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 2.1 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 4 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 69 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 41 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 18.4512, -66.5867. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 4 km (2 mi) SW of here earthquakes near Barceloneta Municipio
Arecibo Municipio, PR 10 km (6 mi) ENE of here earthquakes near Arecibo Municipio
Florida Municipio, PR 10 km (6 mi) NNW of here earthquakes near Florida Municipio
Manatí Municipio, PR 10 km (6 mi) W of here earthquakes near Manatí Municipio
Ciales Municipio, PR 19 km (12 mi) NNW of here earthquakes near Ciales Municipio
Vega Baja Municipio, PR 20 km (12 mi) W 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

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

  1. 2.3 1 km E of Coto Laurel, Puerto Rico
  2. 2.8 43 km NNE of Arecibo, Puerto Rico
  3. 2.2 5 km WSW of Naranjito, Puerto Rico
  4. 2.8 10 km NNE of Tierras Nuevas Poniente, Puerto Rico
  5. 2.2 0 km WSW of Tallaboa Alta, Puerto Rico
  6. 2.6 5 km N of Animas, Puerto Rico
  7. 2.4 3 km ENE of Magas Arriba, Puerto Rico
  8. 3.1 36 km NNE of Arecibo, Puerto Rico
  9. 2.3 2 km N of Tallaboa, Puerto Rico
  10. 2.4 1 km SW of Lares, Puerto Rico
  11. 2.4 19 km NNE of Arecibo, Puerto Rico
  12. 2.1 2 km NE of Magas Arriba, Puerto Rico
  13. 2.3 4 km N of Brenas, Puerto Rico
  14. 2.9 7 km NNE of Brenas, Puerto Rico
  15. 2.2 12 km S of Lares, 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 2,900 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.