QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

2 km NW of Bufalo, Puerto Rico

· 125 km deep · released about 390 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Barceloneta Municipio 5 kmFlorida Municipio 8 kmArecibo Municipio 9 kmManatí Municipio 10 kmCiales Municipio 17 kmVega Baja Municipio 20 kmMorovis Municipio 22 kmUtuado Municipio 22 kmHatillo Municipio 22 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 2.7 (md)
Depth
125 km below the surface
Felt
no reports yet
Nearest
Barceloneta Municipio, 5 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2740 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 390 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 39,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 28,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.5× the energy of this one
  4. This earthquake M 2.7 about 390 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 18.4346, -66.5865. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Barceloneta Municipio, PR 5 km (3 mi) SW of here earthquakes near Barceloneta Municipio
Florida Municipio, PR 8 km (5 mi) NNW of here earthquakes near Florida Municipio
Arecibo Municipio, PR 9 km (6 mi) E of here earthquakes near Arecibo Municipio
Manatí Municipio, PR 10 km (6 mi) W of here earthquakes near Manatí Municipio
Ciales Municipio, PR 17 km (11 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

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

  1. 1.6 3 km SSE of Adjuntas, Puerto Rico
  2. 1.6 3 km WNW of Santo Domingo, Puerto Rico
  3. 1.8 5 km SSE of Adjuntas, Puerto Rico
  4. 1.8 5 km S of Adjuntas, Puerto Rico
  5. 2.1 5 km NNE of Dorado, Puerto Rico
  6. 1.9 13 km N of Levittown, Puerto Rico
  7. 2.5 1 km ESE of Toa Baja, Puerto Rico
  8. 2.2 Puerto Rico region
  9. 1.9 6 km ESE of Maricao, Puerto Rico
  10. 2.2 11 km NNE of Arecibo, Puerto Rico
  11. 1.7 6 km ESE of Jayuya, Puerto Rico
  12. 1.8 8 km NNW of Brenas, Puerto Rico
  13. 1.5 1 km NNW of Animas, Puerto Rico
  14. 1.9 2 km N of Animas, Puerto Rico
  15. 2.9 37 km N of Brenas, 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 310 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.