QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

63 km S of Central Aguirre, Puerto Rico

· 39 km deep · released about 570 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Isabel Municipio 64 kmSalinas Municipio 66 kmGuayama Municipio 68 kmJuana Díaz Municipio 71 kmArroyo Municipio 71 kmPonce Municipio 76 kmPatillas Municipio 77 kmCoamo Municipio 80 kmMaunabo Municipio 81 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 2.9 (md)
Depth
39 km below the surface
Felt
no reports yet
Nearest
Santa Isabel Municipio, 64 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3362 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 570 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 17.3830, -66.3115. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 64 km (40 mi) S of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 66 km (41 mi) S of here earthquakes near Salinas Municipio
Guayama Municipio, PR 68 km (42 mi) SSW of here earthquakes near Guayama Municipio
Juana Díaz Municipio, PR 71 km (44 mi) SSE of here earthquakes near Juana Díaz Municipio
Arroyo Municipio, PR 71 km (44 mi) SSW of here earthquakes near Arroyo Municipio
Ponce Municipio, PR 76 km (47 mi) SSE of here earthquakes near Ponce Municipio

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

Aftershocks so far

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

  1. 3.0 75 km SSE of Arroyo, Puerto Rico
  2. 2.3 27 km SSW of Potala Pastillo, Puerto Rico
  3. 2.4 28 km SSW of Central Aguirre, Puerto Rico
  4. 2.5 44 km S of Santa Isabel, Puerto Rico
  5. 2.9 84 km S of Jobos, Puerto Rico
  6. 2.6 79 km S of Tallaboa, Puerto Rico
  7. 3.0 94 km S of Central Aguirre, Puerto Rico
  8. 2.4 37 km S of Santa Isabel, Puerto Rico
  9. 2.8 43 km SSW of Potala Pastillo, Puerto Rico
  10. 1.8 22 km S of Jobos, Puerto Rico
  11. 2.4 20 km SSE of Jobos, Puerto Rico
  12. 1.8 33 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.