QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

11 km WNW of Puerto Real, Puerto Rico

· 21 km deep · released about 43 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 18 kmCabo Rojo Municipio 18 kmRincón Municipio 24 kmAñasco Municipio 24 kmSan Germán Municipio 26 kmAguada Municipio 30 kmLajas Municipio 31 kmLas Marías Municipio 34 kmMoca Municipio 35 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
21 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 18 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3573 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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 18.1275, -67.2860. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 18 km (11 mi) W of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 18 km (11 mi) NW of here earthquakes near Cabo Rojo Municipio
Rincón Municipio, PR 24 km (15 mi) S of here earthquakes near Rincón Municipio
Añasco Municipio, PR 24 km (15 mi) SW of here earthquakes near Añasco Municipio
San Germán Municipio, PR 26 km (16 mi) W of here earthquakes near San Germán Municipio
Aguada Municipio, PR 30 km (18 mi) SSW of here earthquakes near Aguada 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. 2.2 18 km SSE of Pole Ojea, Puerto Rico
  2. 1.8 13 km WNW of Rincón, Puerto Rico
  3. 2.1 13 km SSE of Pole Ojea, Puerto Rico
  4. 2.3 15 km SSW of La Parguera, Puerto Rico
  5. 2.0 11 km S of Pole Ojea, Puerto Rico
  6. 2.2 14 km SSE of Pole Ojea, Puerto Rico
  7. 2.8 24 km SW of Stella, Puerto Rico
  8. 2.9 19 km WNW of Puerto Real, Puerto Rico
  9. 1.6 6 km ESE of La Parguera, Puerto Rico
  10. 2.6 16 km WSW of Stella, Puerto Rico
  11. 1.7 3 km SE of Boquerón, Puerto Rico
  12. 1.9 3 km SSE of Palmarejo, Puerto Rico
  13. 2.1 1 km NNW of Pole Ojea, Puerto Rico
  14. 2.2 14 km SSW of Guánica, Puerto Rico
  15. 2.8 0 km ENE of Maricao, 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

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