QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

10 km W of Mayagüez, Puerto Rico

· 20 km deep · released about 1.1 tons of TNT

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10 km30 km60 km120 km N Añasco Municipio 14 kmHormigueros Municipio 15 kmRincón Municipio 15 kmAguada Municipio 20 kmSan Germán Municipio 23 kmCabo Rojo Municipio 24 kmMoca Municipio 26 kmLas Marías Municipio 27 kmSan Sebastián Municipio 32 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 3.2 (md)
Depth
20 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
Añasco Municipio, 14 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2089 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 1.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 150,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,900× the energy of this one
  4. This earthquake M 3.2 about 1.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.3× more

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 18.2023, -67.2355. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 14 km (9 mi) SW of here earthquakes near Añasco Municipio
Hormigueros Municipio, PR 15 km (9 mi) WNW of here earthquakes near Hormigueros Municipio
Rincón Municipio, PR 15 km (9 mi) S of here earthquakes near Rincón Municipio
Aguada Municipio, PR 20 km (12 mi) SSW of here earthquakes near Aguada Municipio
San Germán Municipio, PR 23 km (15 mi) WNW of here earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 24 km (15 mi) NNW of here earthquakes near Cabo Rojo Municipio

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

Aftershocks so far

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

  1. 1.5 4 km SW of Guánica, Puerto Rico
  2. 2.1 7 km WSW of Guánica, Puerto Rico
  3. 1.6 6 km WSW of Guánica, Puerto Rico
  4. 2.0 6 km SW of Palmarejo, Puerto Rico
  5. 1.7 6 km WSW of Fuig, Puerto Rico
  6. 1.9 0 km NW of Palomas, Puerto Rico
  7. 2.5 6 km WSW of Guánica, Puerto Rico
  8. 2.1 5 km ESE of La Parguera, Puerto Rico
  9. 1.9 3 km WSW of Guánica, Puerto Rico
  10. 2.0 1 km S of Yauco, Puerto Rico
  11. 2.0 6 km ESE of Pole Ojea, Puerto Rico
  12. 1.8 7 km ESE of La Parguera, Puerto Rico
  13. 1.7 5 km SW of Guánica, Puerto Rico
  14. 1.9 5 km WNW of Puerto Real, Puerto Rico
  15. 1.6 6 km SSE of La Parguera, 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 5.9 on 2020-01-11 — it released about 9,800 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.