QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

4 km ENE of Mayagüez, Puerto Rico

· 26 km deep · released about 290 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 9 kmHormigueros Municipio 9 kmLas Marías Municipio 13 kmSan Germán Municipio 14 kmMaricao Municipio 18 kmMoca Municipio 18 kmSan Sebastián Municipio 19 kmAguada Municipio 20 kmRincón Municipio 21 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
26 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 9 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2930 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 290 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 51,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 36,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.2× the energy of this one
  4. This earthquake M 2.7 about 290 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 18.2140, -67.1036. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 9 km (5 mi) SSE of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 9 km (6 mi) N of here earthquakes near Hormigueros Municipio
Las Marías Municipio, PR 13 km (8 mi) W of here earthquakes near Las Marías Municipio
San Germán Municipio, PR 14 km (9 mi) NNW of here earthquakes near San Germán Municipio
Maricao Municipio, PR 18 km (11 mi) WNW of here earthquakes near Maricao Municipio
Moca Municipio, PR 18 km (11 mi) S of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 1.5 2 km SSE of Guayanilla, Puerto Rico
  2. 2.1 3 km SW of Maricao, Puerto Rico
  3. 2.0 20 km SW of Stella, Puerto Rico
  4. 2.4 18 km N of San Antonio, Puerto Rico
  5. 2.1 3 km E of Pole Ojea, Puerto Rico
  6. 2.7 6 km E of Espino, Puerto Rico
  7. 2.3 5 km WNW of Las Marías, Puerto Rico
  8. 2.3 5 km E of Espino, Puerto Rico
  9. 2.0 6 km ENE of Espino, Puerto Rico
  10. 1.9 8 km WSW of Puerto Real, Puerto Rico
  11. 1.9 12 km SSE of Maria Antonia, Puerto Rico
  12. 2.0 12 km NW of Puerto Real, Puerto Rico
  13. 2.3 33 km SW of Stella, Puerto Rico
  14. 2.1 1 km W of Puerto Real, Puerto Rico
  15. 2.5 19 km SW of Stella, 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 290 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.