QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7Md

1 km NW of Monte Grande, Puerto Rico

· 26 km deep · released about 340 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 4 kmSan Germán Municipio 9 kmCabo Rojo Municipio 13 kmLajas Municipio 16 kmSabana Grande Municipio 18 kmLas Marías Municipio 21 kmAñasco Municipio 21 kmMaricao Municipio 21 kmGuánica 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
26 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 4 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3468 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 340 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 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 18.0984, -67.1179. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 4 km (3 mi) S of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 9 km (5 mi) W of here earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 13 km (8 mi) NNE of here earthquakes near Cabo Rojo Municipio
Lajas Municipio, PR 16 km (10 mi) NNW of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 18 km (11 mi) W of here earthquakes near Sabana Grande Municipio
Las Marías Municipio, PR 21 km (13 mi) SW of here earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 2.3 11 km SSE of Guánica, Puerto Rico
  2. 2.1 3 km N of Monte Grande, Puerto Rico
  3. 2.0 33 km S of Pole Ojea, Puerto Rico
  4. 2.4 1 km W of Palmarejo, Puerto Rico
  5. 1.6 9 km S of La Parguera, Puerto Rico
  6. 1.9 4 km NNW of Puerto Real, Puerto Rico
  7. 2.7 1 km ENE of Mayagüez, Puerto Rico
  8. 2.0 2 km WSW of Sabana Grande, Puerto Rico
  9. 2.3 3 km SSE of La Parguera, Puerto Rico
  10. 1.9 9 km SW of La Parguera, Puerto Rico
  11. 2.3 9 km SW of Guánica, Puerto Rico
  12. 2.5 19 km WNW of Rincón, Puerto Rico
  13. 2.7 19 km SW of Stella, Puerto Rico
  14. 1.6 3 km SW of Mayagüez, Puerto Rico
  15. 2.3 1 km NW of Liborio Negron Torres, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.