QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

10 km NW of Puerto Real, Puerto Rico

· 14 km deep · released about 8.1 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 16 kmCabo Rojo Municipio 18 kmAñasco Municipio 23 kmRincón Municipio 23 kmSan Germán Municipio 25 kmAguada Municipio 28 kmLajas Municipio 29 kmLas Marías Municipio 32 kmMoca Municipio 34 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 1.6 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 16 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2901 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 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 18.1316, -67.2680. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 16 km (10 mi) W of here earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 18 km (11 mi) NNW of here earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 23 km (14 mi) SW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 23 km (14 mi) S of here earthquakes near Rincón Municipio
San Germán Municipio, PR 25 km (15 mi) W of here earthquakes near San Germán Municipio
Aguada Municipio, PR 28 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. 2.1 2 km W of Palmarejo, Puerto Rico
  2. 1.6 0 km E of Boquerón, Puerto Rico
  3. 2.5 1 km SW of Boquerón, Puerto Rico
  4. 2.9 20 km WSW of Pole Ojea, Puerto Rico
  5. 1.6 6 km NE of Sabana Grande, Puerto Rico
  6. 2.5 0 km N of San Antonio, Puerto Rico
  7. 1.8 6 km NE of La Parguera, Puerto Rico
  8. 2.3 4 km SW of Palmarejo, Puerto Rico
  9. 1.7 3 km SW of Palmarejo, Puerto Rico
  10. 2.2 6 km SW of La Parguera, Puerto Rico
  11. 1.8 5 km ENE of Mayagüez, Puerto Rico
  12. 2.8 33 km W of Pole Ojea, Puerto Rico
  13. 2.8 30 km WSW of Stella, Puerto Rico
  14. 2.6 16 km W of Puerto Real, Puerto Rico
  15. 2.1 24 km NE of Stella, 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 — it released about 10,000 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.