QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

9 km S of Tallaboa, Puerto Rico

· 17 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Peñuelas Municipio 13 kmGuayanilla Municipio 14 kmPonce Municipio 15 kmGuánica Municipio 23 kmJuana Díaz Municipio 25 kmYauco Municipio 25 kmAdjuntas Municipio 31 kmSabana Grande Municipio 32 kmSanta Isabel 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 1.8 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Peñuelas Municipio, 13 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2841 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 17.9090, -66.7091. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Peñuelas Municipio, PR 13 km (8 mi) S of here earthquakes near Peñuelas Municipio
Guayanilla Municipio, PR 14 km (9 mi) SE of here earthquakes near Guayanilla Municipio
Ponce Municipio, PR 15 km (9 mi) SW of here earthquakes near Ponce Municipio
Guánica Municipio, PR 23 km (14 mi) E of here earthquakes near Guánica Municipio
Juana Díaz Municipio, PR 25 km (16 mi) WSW of here earthquakes near Juana Díaz Municipio
Yauco Municipio, PR 25 km (16 mi) SE of here earthquakes near Yauco Municipio

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

Aftershocks so far

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

  1. 1.7 10 km SSW of Guánica, Puerto Rico
  2. 1.9 7 km NE of Utuado, Puerto Rico
  3. 1.7 11 km SSW of Guánica, Puerto Rico
  4. 2.1 16 km SSE of Maria Antonia, Puerto Rico
  5. 1.8 4 km N of La Parguera, Puerto Rico
  6. 1.9 18 km S of Guánica, Puerto Rico
  7. 1.8 9 km S of Guánica, Puerto Rico
  8. 2.2 9 km SSW of Guánica, Puerto Rico
  9. 2.1 9 km SSW of Guánica, Puerto Rico
  10. 1.8 20 km S of Guánica, Puerto Rico
  11. 1.5 7 km S of Tallaboa, Puerto Rico
  12. 1.6 0 km SE of Maricao, Puerto Rico
  13. 2.4 2 km SSE of Río Cañas Abajo, Puerto Rico
  14. 1.6 3 km SW of Sabana Grande, Puerto Rico
  15. 1.8 7 km SSW of Tallaboa, 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.