QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

5 km WSW of Mayagüez, Puerto Rico

· 79 km deep · released about 330 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 9 kmAñasco Municipio 13 kmSan Germán Municipio 18 kmRincón Municipio 19 kmCabo Rojo Municipio 21 kmAguada Municipio 22 kmLas Marías Municipio 23 kmMoca Municipio 25 kmMaricao Municipio 27 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
79 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 9 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2913 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 330 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 46,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 33,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.9× the energy of this one
  4. This earthquake M 2.7 about 330 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 18.1815, -67.1903. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 9 km (6 mi) WNW of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 13 km (8 mi) SSW of here earthquakes near Añasco Municipio
San Germán Municipio, PR 18 km (11 mi) WNW of here earthquakes near San Germán Municipio
Rincón Municipio, PR 19 km (12 mi) SSE of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 21 km (13 mi) N of here earthquakes near Cabo Rojo Municipio
Aguada Municipio, PR 22 km (13 mi) S of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 2.1 7 km NW of Puerto Real, Puerto Rico
  2. 2.2 Mona Passage
  3. 2.1 5 km NW of Puerto Real, Puerto Rico
  4. 2.1 7 km NNW of Puerto Real, Puerto Rico
  5. 2.2 8 km NW of Puerto Real, Puerto Rico
  6. 2.3 9 km WNW of Puerto Real, Puerto Rico
  7. 1.9 8 km NW of Puerto Real, Puerto Rico
  8. 2.4 10 km NW of Puerto Real, Puerto Rico
  9. 2.9 9 km NW of Puerto Real, Puerto Rico
  10. 1.7 7 km ENE of Sabana Grande, Puerto Rico
  11. 2.2 5 km WNW of Puerto Real, Puerto Rico
  12. 2.2 8 km WNW of Puerto Real, Puerto Rico
  13. 1.8 7 km WNW of Puerto Real, Puerto Rico
  14. 2.0 7 km NW of Puerto Real, Puerto Rico
  15. 2.8 10 km NW 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 4.3 on 2017-10-14 — it released about 260 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.