QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7Md

7 km WSW of Mayagüez, Puerto Rico

· 23 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Hormigueros Municipio 11 kmAñasco Municipio 14 kmRincón Municipio 18 kmSan Germán Municipio 20 kmCabo Rojo Municipio 21 kmAguada Municipio 22 kmLas Marías Municipio 25 kmMoca Municipio 26 kmLajas Municipio 29 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
23 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 11 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3604 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 11 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 1,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 89× the energy of this one
  4. This earthquake M 1.7 about 11 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 18.1833, -67.2098. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Hormigueros Municipio, PR 11 km (7 mi) WNW of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 14 km (9 mi) SW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 18 km (11 mi) SSE of here earthquakes near Rincón Municipio
San Germán Municipio, PR 20 km (12 mi) WNW of here earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 21 km (13 mi) N of here earthquakes near Cabo Rojo Municipio
Aguada Municipio, PR 22 km (13 mi) S of here earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 1.7 1 km NNE of Puerto Real, Puerto Rico
  2. 2.3 9 km S of Pole Ojea, Puerto Rico
  3. 1.6 7 km WSW of La Parguera, Puerto Rico
  4. 2.1 1 km SE of San Germán, Puerto Rico
  5. 2.5 15 km SSW of Stella, Puerto Rico
  6. 2.4 7 km WSW of La Parguera, Puerto Rico
  7. 1.9 8 km WSW of La Parguera, Puerto Rico
  8. 2.4 7 km WSW of La Parguera, Puerto Rico
  9. 2.6 5 km WNW of La Parguera, Puerto Rico
  10. 2.6 5 km WSW of La Parguera, Puerto Rico
  11. 2.4 8 km SSE of La Parguera, Puerto Rico
  12. 2.3 20 km S of La Parguera, Puerto Rico
  13. 2.8 32 km WNW of Rincón, Puerto Rico
  14. 2.3 13 km SSW of Guánica, Puerto Rico
  15. 2.4 1 km W of San Germán, 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.