QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

1 km ESE of Mariano Colón, Puerto Rico

· 10 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 8 kmSanta Isabel Municipio 11 kmCoamo Municipio 11 kmAibonito Municipio 14 kmJuana Díaz Municipio 19 kmGuayama Municipio 19 kmCayey Municipio 20 kmBarranquitas Municipio 20 kmVillalba Municipio 21 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 1.8 (md)
Depth
10 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Salinas Municipio, 8 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2540 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 18.0175, -66.3150. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Salinas Municipio, PR 8 km (5 mi) NW of here earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 11 km (7 mi) NE of here earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 11 km (7 mi) SSE of here earthquakes near Coamo Municipio
Aibonito Municipio, PR 14 km (8 mi) SSW of here earthquakes near Aibonito Municipio
Juana Díaz Municipio, PR 19 km (12 mi) E of here earthquakes near Juana Díaz Municipio
Guayama Municipio, PR 19 km (12 mi) WNW of here earthquakes near Guayama Municipio

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

Aftershocks so far

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

  1. 2.7 4 km SE of Jauca, Puerto Rico
  2. 1.8 8 km ESE of Adjuntas, Puerto Rico
  3. 1.9 2 km E of Jauca, Puerto Rico
  4. 1.9 2 km ESE of Jauca, Puerto Rico
  5. 1.7 6 km SSE of Jauca, Puerto Rico
  6. 1.7 15 km S of Ponce, Puerto Rico
  7. 2.3 4 km SE of Jauca, Puerto Rico
  8. 1.6 6 km SSW of Jagual, Puerto Rico
  9. 2.1 4 km SSE of Salinas, Puerto Rico
  10. 2.2 2 km SSE of Salinas, Puerto Rico
  11. 1.9 2 km SSW of Las Ochenta, Puerto Rico
  12. 2.5 2 km NNE of El Ojo, Puerto Rico
  13. 2.2 3 km ESE of Jauca, Puerto Rico
  14. 1.9 5 km SE of Jauca, Puerto Rico
  15. 1.6 14 km SSW of Potala Pastillo, 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 16,000 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.