QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km S of Guayanilla, Puerto Rico

· 27 km deep · released about 40 lb of TNT

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10 km30 km60 km120 km N Guayanilla Municipio 1 kmPeñuelas Municipio 7 kmYauco Municipio 12 kmGuánica Municipio 15 kmPonce Municipio 19 kmSabana Grande Municipio 19 kmAdjuntas Municipio 21 kmMaricao Municipio 25 kmLajas 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 2.1 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 1 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3412 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 270,000× the energy of this one
  3. Around the size people start to feel M 3.0 24× the energy of this one
  4. This earthquake M 2.1 about 40 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 17.9950, -66.7895. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 1 km (1 mi) SE of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 7 km (5 mi) WSW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 12 km (8 mi) SE of here earthquakes near Yauco Municipio
Guánica Municipio, PR 15 km (9 mi) ENE of here earthquakes near Guánica Municipio
Ponce Municipio, PR 19 km (12 mi) W of here earthquakes near Ponce Municipio
Sabana Grande Municipio, PR 19 km (12 mi) ESE of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.0 7 km ESE of La Parguera, Puerto Rico
  2. 1.9 21 km S of La Parguera, Puerto Rico
  3. 1.6 2 km S of Cabo Rojo, Puerto Rico
  4. 2.0 0 km NW of Liborio Negron Torres, Puerto Rico
  5. 2.1 14 km S of Pole Ojea, Puerto Rico
  6. 2.1 3 km SSE of Pole Ojea, Puerto Rico
  7. 2.7 Puerto Rico region
  8. 2.5 6 km W of Hormigueros, Puerto Rico
  9. 2.4 26 km S of Ponce, Puerto Rico
  10. 2.2 9 km SW of Guánica, Puerto Rico
  11. 2.2 11 km SW of Guánica, Puerto Rico
  12. 2.2 4 km ENE of Mayagüez, Puerto Rico
  13. 1.8 Puerto Rico region
  14. 1.5 3 km S of Palmarejo, Puerto Rico
  15. 2.4 1 km ENE of Mayagüez, 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.