QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

2 km NW of Puerto Real, Puerto Rico

· 21 km deep · released about 7.8 lb of TNT

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10 km30 km60 km120 km N Cabo Rojo Municipio 10 kmHormigueros Municipio 11 kmSan Germán Municipio 18 kmLajas Municipio 21 kmAñasco Municipio 23 kmSabana Grande Municipio 27 kmRincón Municipio 28 kmLas Marías Municipio 29 kmMaricao Municipio 30 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
21 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Cabo Rojo Municipio, 10 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1511 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 7.8 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 1,400,000× 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 7.8 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 18.0870, -67.2033. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cabo Rojo Municipio, PR 10 km (6 mi) NNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 11 km (7 mi) WSW of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 18 km (11 mi) W of here earthquakes near San Germán Municipio
Lajas Municipio, PR 21 km (13 mi) NW of here earthquakes near Lajas Municipio
Añasco Municipio, PR 23 km (15 mi) SSW of here earthquakes near Añasco Municipio
Sabana Grande Municipio, PR 27 km (17 mi) W of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 2.6 36 km W of Puerto Real, Puerto Rico
  2. 2.1 14 km NW of Puerto Real, Puerto Rico
  3. 1.8 4 km SW of Juncal, Puerto Rico
  4. 1.6 8 km NE of Sabana Grande, Puerto Rico
  5. 2.4 32 km W of Rincón, Puerto Rico
  6. 1.9 4 km SSW of Adjuntas, Puerto Rico
  7. 1.9 6 km SE of Maricao, Puerto Rico
  8. 2.1 23 km WNW of Puerto Real, Puerto Rico
  9. 2.0 4 km ENE of Las Marías, Puerto Rico
  10. 2.1 7 km SW of Mayagüez, Puerto Rico
  11. 2.2 7 km WSW of Mayagüez, Puerto Rico
  12. 2.3 2 km NE of Rincón, Puerto Rico
  13. 2.1 6 km SE of Maricao, Puerto Rico
  14. 2.8 20 km SW of Stella, Puerto Rico
  15. 1.9 3 km ENE of Magas Arriba, 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 11,000 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.