QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

2 km ENE of Hormigueros, Puerto Rico

· 26 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 2 kmSan Germán Municipio 8 kmAñasco Municipio 16 kmLas Marías Municipio 16 kmMaricao Municipio 18 kmSabana Grande Municipio 18 kmCabo Rojo Municipio 19 kmLajas Municipio 20 kmSan Sebastián Municipio 25 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 1.7 (md)
Depth
26 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 2 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2494 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 18.1488, -67.1010. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 2 km (1 mi) NE of here earthquakes near Hormigueros Municipio
San Germán Municipio, PR 8 km (5 mi) NW of here earthquakes near San Germán Municipio
Añasco Municipio, PR 16 km (10 mi) SSE of here earthquakes near Añasco Municipio
Las Marías Municipio, PR 16 km (10 mi) SW of here earthquakes near Las Marías Municipio
Maricao Municipio, PR 18 km (11 mi) W of here earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 18 km (11 mi) WNW of here earthquakes near Sabana Grande Municipio

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

Aftershocks so far

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

  1. 1.9 6 km NE of Sabana Grande, Puerto Rico
  2. 2.0 3 km SSW of Espino, Puerto Rico
  3. 2.4 13 km S of La Parguera, Puerto Rico
  4. 2.6 37 km WSW of Stella, Puerto Rico
  5. 2.8 19 km SW of Stella, Puerto Rico
  6. 2.8 3 km SW of Mayagüez, Puerto Rico
  7. 2.1 16 km S of La Parguera, Puerto Rico
  8. 2.0 17 km SSE of La Parguera, Puerto Rico
  9. 1.8 7 km WSW of Adjuntas, Puerto Rico
  10. 2.3 2 km ESE of Hormigueros, Puerto Rico
  11. 1.9 4 km N of Puerto Real, Puerto Rico
  12. 2.0 2 km SSE of Magas Arriba, Puerto Rico
  13. 1.9 8 km NNW of Puerto Real, Puerto Rico
  14. 2.1 1 km SSE of Aguada, Puerto Rico
  15. 1.9 4 km E of Rincón, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2019-09-05 — it released about 9,100 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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