QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

7 km SE of Espino, Puerto Rico

· 24 km deep · released about 37 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 9 kmLas Marías Municipio 11 kmHormigueros Municipio 11 kmSan Germán Municipio 14 kmMaricao Municipio 16 kmSan Sebastián Municipio 16 kmMoca Municipio 17 kmAguada Municipio 20 kmSabana Grande 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 2.1 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 9 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2551 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 18.2270, -67.0773. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 9 km (5 mi) SE of here earthquakes near Añasco Municipio
Las Marías Municipio, PR 11 km (7 mi) W of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 11 km (7 mi) NNE of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 14 km (9 mi) NNW of here earthquakes near San Germán Municipio
Maricao Municipio, PR 16 km (10 mi) WNW of here earthquakes near Maricao Municipio
San Sebastián Municipio, PR 16 km (10 mi) SW of here earthquakes near San Sebastián Municipio

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

Aftershocks so far

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

  1. 1.6 0 km NW of Cabo Rojo, Puerto Rico
  2. 1.7 3 km WNW of Pole Ojea, Puerto Rico
  3. 1.7 1 km S of Liborio Negron Torres, Puerto Rico
  4. 1.9 4 km WNW of Fuig, Puerto Rico
  5. 2.0 10 km W of Adjuntas, Puerto Rico
  6. 2.6 31 km W of Puerto Real, Puerto Rico
  7. 1.9 11 km SSE of La Parguera, Puerto Rico
  8. 2.4 7 km ESE of Maricao, Puerto Rico
  9. 1.8 12 km N of Yauco, Puerto Rico
  10. 1.6 11 km SE of La Parguera, Puerto Rico
  11. 1.8 7 km WNW of Puerto Real, Puerto Rico
  12. 2.3 7 km WSW of Guánica, Puerto Rico
  13. 2.4 37 km W of Puerto Real, Puerto Rico
  14. 1.6 3 km WSW of Fuig, Puerto Rico
  15. 1.9 2 km SW of Adjuntas, 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 2019-09-05 — it released about 2,300 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.