QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

4 km SSW of Salinas, Puerto Rico

· 11 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Salinas Municipio 6 kmSanta Isabel Municipio 8 kmCoamo Municipio 18 kmGuayama Municipio 19 kmJuana Díaz Municipio 20 kmAibonito Municipio 21 kmCayey Municipio 25 kmVillalba Municipio 27 kmBarranquitas Municipio 29 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 1.5 (md)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 6 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2721 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 17.9433, -66.3125. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 6 km (4 mi) WSW of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 8 km (5 mi) E of here earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 18 km (11 mi) SSE of here earthquakes near Coamo Municipio
Guayama Municipio, PR 19 km (12 mi) W of here earthquakes near Guayama Municipio
Juana Díaz Municipio, PR 20 km (12 mi) ESE of here earthquakes near Juana Díaz Municipio
Aibonito Municipio, PR 21 km (13 mi) SSW of here earthquakes near Aibonito 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. 1.6 12 km S of Emajagua, Puerto Rico
  2. 1.5 15 km SSW of Potala Pastillo, Puerto Rico
  3. 1.9 14 km SW of Potala Pastillo, Puerto Rico
  4. 1.8 2 km ESE of Potala Pastillo, Puerto Rico
  5. 2.6 3 km WSW of Ciales, Puerto Rico
  6. 1.5 3 km NE of Río Cañas Abajo, Puerto Rico
  7. 1.8 6 km ESE of Jayuya, Puerto Rico
  8. 1.9 6 km NW of Villalba, Puerto Rico
  9. 1.6 2 km WSW of Jauca, Puerto Rico
  10. 1.9 4 km SSW of Adjuntas, Puerto Rico
  11. 1.9 9 km ENE of Jayuya, Puerto Rico
  12. 2.5 15 km S of Potala Pastillo, Puerto Rico
  13. 1.9 3 km ENE of Magas Arriba, Puerto Rico
  14. 1.9 19 km S of Tallaboa, Puerto Rico
  15. 1.9 5 km SSE of Arroyo, 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 4.6 on 2016-12-05 — it released about 45,000 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.