QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5md

3 km NNW of Sabana Grande, Puerto Rico

· 16 km deep · released about 6.2 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sabana Grande Municipio 4 kmSan Germán Municipio 7 kmMaricao Municipio 8 kmYauco Municipio 12 kmLas Marías Municipio 13 kmHormigueros Municipio 15 kmLajas Municipio 16 kmGuánica Municipio 18 kmGuayanilla Municipio 22 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 1.5 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Sabana Grande Municipio, 4 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2971 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 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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 18.1073, -66.9728. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sabana Grande Municipio, PR 4 km (2 mi) NW of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 7 km (4 mi) E of here earthquakes near San Germán Municipio
Maricao Municipio, PR 8 km (5 mi) SSW of here earthquakes near Maricao Municipio
Yauco Municipio, PR 12 km (8 mi) W of here earthquakes near Yauco Municipio
Las Marías Municipio, PR 13 km (8 mi) S of here earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 15 km (10 mi) ESE of here earthquakes near Hormigueros Municipio

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

Aftershocks so far

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

  1. 2.3 15 km WSW of Puerto Real, Puerto Rico
  2. 2.0 14 km NW of Puerto Real, Puerto Rico
  3. 2.0 6 km SW of Maricao, Puerto Rico
  4. 2.1 Mona Passage
  5. 2.5 4 km E of Isabela, Puerto Rico
  6. 1.8 3 km NW of Sabana Grande, Puerto Rico
  7. 2.1 3 km WSW of Maricao, Puerto Rico
  8. 2.1 5 km WNW of Maricao, Puerto Rico
  9. 2.6 8 km W of Rincón, Puerto Rico
  10. 1.9 5 km ESE of La Parguera, Puerto Rico
  11. 2.4 20 km WNW of Puerto Real, Puerto Rico
  12. 1.6 2 km SE of Guánica, Puerto Rico
  13. 1.6 5 km SW of Guánica, Puerto Rico
  14. 1.8 6 km SW of Liborio Negron Torres, Puerto Rico
  15. 1.8 8 km SSE of Guánica, 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.