QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

36 km W of Puerto Real, Puerto Rico

· 18 km deep · released about 310 lb of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 38 kmRincón Municipio 38 kmCabo Rojo Municipio 39 kmHormigueros Municipio 44 kmAñasco Municipio 46 kmAguada Municipio 46 kmSan Germán Municipio 52 kmLajas Municipio 54 kmMoca Municipio 56 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
18 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 38 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2851 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 310 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 50,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 35,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.1× the energy of this one
  4. This earthquake M 2.7 about 310 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 18.1190, -67.5311. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 38 km (23 mi) E of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 38 km (24 mi) SW of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 39 km (24 mi) WNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 44 km (27 mi) W of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 46 km (29 mi) WSW of here earthquakes near Añasco Municipio
Aguada Municipio, PR 46 km (29 mi) SW of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 2.0 9 km NW of Puerto Real, Puerto Rico
  2. 2.1 7 km NNW of Rincón, Puerto Rico
  3. 1.6 16 km WSW of Rincón, Puerto Rico
  4. 2.3 22 km NW of Rincón, Puerto Rico
  5. 2.5 5 km ENE of Mayagüez, Puerto Rico
  6. 2.8 47 km WSW of Stella, Puerto Rico
  7. 1.9 0 km NNW of Puerto Real, Puerto Rico
  8. 2.3 8 km WSW of Mayagüez, Puerto Rico
  9. 2.8 25 km NW of Rincón, Puerto Rico
  10. 2.3 7 km NNW of Puerto Real, Puerto Rico
  11. 1.8 13 km WNW of Puerto Real, Puerto Rico
  12. 2.4 28 km NW of Rincón, Puerto Rico
  13. 1.9 5 km WSW of Puerto Real, Puerto Rico
  14. 2.3 4 km ESE of Mayagüez, Puerto Rico
  15. 2.4 25 km W of Puerto Real, 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 2017-10-01 — it released about 390 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.