QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3ml

21 km WNW of Puerto Real, Puerto Rico

· 3.0 km deep · released about 43 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 25 kmCabo Rojo Municipio 27 kmHormigueros Municipio 28 kmAñasco Municipio 30 kmAguada Municipio 32 kmSan Germán Municipio 36 kmMoca Municipio 40 kmLajas Municipio 40 kmLas Marías Municipio 43 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 4.3 (ml)
Depth
3.0 km below the surface
Felt
59 reports · strongest reported intensity IV
Nearest
Rincón Municipio, 25 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2493 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 59 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 4,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
  3. Magna, Utah 2020 M 5.7 130× the energy of this one
  4. This earthquake M 4.3 about 43 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 89× 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 18.1506, -67.3771. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 25 km (15 mi) SSW of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 27 km (17 mi) NW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 28 km (17 mi) W of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 30 km (19 mi) WSW of here earthquakes near Añasco Municipio
Aguada Municipio, PR 32 km (20 mi) SW of here earthquakes near Aguada Municipio
San Germán Municipio, PR 36 km (23 mi) W of here earthquakes near San Germán Municipio

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

Aftershocks so far

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

  1. 1.6 4 km ESE of Boquerón, Puerto Rico
  2. 2.0 1 km SE of Maricao, Puerto Rico
  3. 2.2 3 km ESE of Maricao, Puerto Rico
  4. 2.1 20 km SW of Stella, Puerto Rico
  5. 1.9 2 km SSE of Mayagüez, Puerto Rico
  6. 2.1 7 km SE of Espino, Puerto Rico
  7. 2.6 27 km W of Rincón, Puerto Rico
  8. 1.6 6 km WSW of Liborio Negron Torres, Puerto Rico
  9. 1.9 4 km WNW of La Parguera, Puerto Rico
  10. 1.8 11 km SSE of La Parguera, Puerto Rico
  11. 1.6 2 km NW of Maricao, Puerto Rico
  12. 1.8 4 km ESE of Boquerón, Puerto Rico
  13. 1.6 10 km NW of Puerto Real, Puerto Rico
  14. 1.9 3 km SW of San Sebastián, Puerto Rico
  15. 1.9 7 km WNW of Pole Ojea, 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 2017-10-14.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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