QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

12 km S of Salinas, Puerto Rico

· 6.0 km deep · released about 530 lb of TNT

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10 km30 km60 km120 km N Salinas Municipio 12 kmSanta Isabel Municipio 13 kmGuayama Municipio 21 kmJuana Díaz Municipio 24 kmCoamo Municipio 27 kmAibonito Municipio 29 kmArroyo Municipio 30 kmCayey Municipio 31 kmVillalba 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 2.8 (md)
Depth
6.0 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 12 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2535 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 20,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.8× the energy of this one
  4. This earthquake M 2.8 about 530 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 17.8691, -66.3063. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 12 km (8 mi) SSW of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 13 km (8 mi) SE of here earthquakes near Santa Isabel Municipio
Guayama Municipio, PR 21 km (13 mi) WSW of here earthquakes near Guayama Municipio
Juana Díaz Municipio, PR 24 km (15 mi) SE of here earthquakes near Juana Díaz Municipio
Coamo Municipio, PR 27 km (17 mi) SSE of here earthquakes near Coamo Municipio
Aibonito Municipio, PR 29 km (18 mi) S of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.1 2 km NE of Jayuya, Puerto Rico
  2. 1.6 2 km NNW of Río Cañas Abajo, Puerto Rico
  3. 2.3 2 km W of Bayamon, Puerto Rico
  4. 1.5 7 km SSE of Jauca, Puerto Rico
  5. 1.7 10 km S of Salinas, Puerto Rico
  6. 1.6 2 km SSE of Río Cañas Abajo, Puerto Rico
  7. 2.0 1 km SE of Santa Isabel, Puerto Rico
  8. 1.5 8 km S of Salinas, Puerto Rico
  9. 2.4 21 km S of Lamboglia, Puerto Rico
  10. 1.5 11 km SSW of Emajagua, Puerto Rico
  11. 1.7 4 km ESE of Ponce, Puerto Rico
  12. 1.6 2 km SSE of Ponce, Puerto Rico
  13. 1.5 5 km WSW of Naranjito, Puerto Rico
  14. 1.6 2 km SE of Santa Isabel, Puerto Rico
  15. 2.7 10 km S of Emajagua, 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 450 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.