QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

11 km S of Santa Isabel, Puerto Rico

· 8.0 km deep · released about 46 lb of TNT

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10 km30 km60 km120 km N Santa Isabel Municipio 10 kmJuana Díaz Municipio 18 kmSalinas Municipio 18 kmCoamo Municipio 27 kmPonce Municipio 27 kmGuayama Municipio 30 kmVillalba Municipio 31 kmAibonito Municipio 33 kmCayey Municipio 37 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 2.1 (md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 10 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3353 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 46 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 330,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 21× the energy of this one
  4. This earthquake M 2.1 about 46 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 17.8641, -66.3923. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 10 km (6 mi) S of here earthquakes near Santa Isabel Municipio
Juana Díaz Municipio, PR 18 km (11 mi) SE of here earthquakes near Juana Díaz Municipio
Salinas Municipio, PR 18 km (11 mi) SW of here earthquakes near Salinas Municipio
Coamo Municipio, PR 27 km (17 mi) S of here earthquakes near Coamo Municipio
Ponce Municipio, PR 27 km (17 mi) SE of here earthquakes near Ponce Municipio
Guayama Municipio, PR 30 km (18 mi) WSW of here earthquakes near Guayama Municipio

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

Aftershocks so far

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

  1. 2.2 3 km NW of Guayabal, Puerto Rico
  2. 2.1 24 km S of Tallaboa, Puerto Rico
  3. 1.7 11 km SSW of Potala Pastillo, Puerto Rico
  4. 2.4 37 km S of Santa Isabel, Puerto Rico
  5. 2.3 4 km SW of Capitanejo, Puerto Rico
  6. 2.0 2 km WNW of Tallaboa, Puerto Rico
  7. 2.2 1 km WSW of Magas Arriba, Puerto Rico
  8. 2.6 3 km SE of Magas Arriba, Puerto Rico
  9. 2.5 2 km N of Tallaboa, Puerto Rico
  10. 2.8 21 km SSE of Arroyo, Puerto Rico
  11. 2.5 5 km ESE of G. L. Garcia, Puerto Rico
  12. 2.4 22 km SSE of Arroyo, Puerto Rico
  13. 2.8 43 km SSW of Potala Pastillo, Puerto Rico
  14. 2.9 21 km S of Lamboglia, Puerto Rico
  15. 1.8 22 km S of Jobos, 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.