QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6Md

16 km SSE of Santa Isabel, Puerto Rico

· 16 km deep · released about 7.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Isabel Municipio 15 kmSalinas Municipio 20 kmJuana Díaz Municipio 23 kmGuayama Municipio 30 kmCoamo Municipio 31 kmPonce Municipio 32 kmVillalba Municipio 36 kmAibonito Municipio 36 kmArroyo Municipio 39 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
16 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 15 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3654 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 7.6 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 2,000,000× 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 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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 17.8215, -66.3734. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 15 km (9 mi) S of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 20 km (13 mi) SW of here earthquakes near Salinas Municipio
Juana Díaz Municipio, PR 23 km (14 mi) SSE of here earthquakes near Juana Díaz Municipio
Guayama Municipio, PR 30 km (19 mi) SW of here earthquakes near Guayama Municipio
Coamo Municipio, PR 31 km (20 mi) S of here earthquakes near Coamo Municipio
Ponce Municipio, PR 32 km (20 mi) SE of here earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 3.0 63 km S of Santa Isabel, Puerto Rico
  2. 2.6 17 km S of Tallaboa, Puerto Rico
  3. 2.2 4 km SSW of Central Aguirre, Puerto Rico
  4. 2.1 1 km SSE of Ponce, Puerto Rico
  5. 2.8 1 km S of Ponce, Puerto Rico
  6. 2.7 1 km SSE of Ponce, Puerto Rico
  7. 1.7 1 km SE of Jayuya, Puerto Rico
  8. 2.2 2 km E of Potala Pastillo, Puerto Rico
  9. 2.2 1 km SW of Salinas, Puerto Rico
  10. 2.4 4 km ESE of Villalba, Puerto Rico
  11. 2.7 1 km WNW of Potala Pastillo, Puerto Rico
  12. 2.6 4 km S of G. L. Garcia, Puerto Rico
  13. 2.5 21 km S of Ponce, Puerto Rico
  14. 2.5 Puerto Rico region
  15. 2.3 16 km S of Ponce, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.