QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

3 km SSE of Monte Grande, Puerto Rico

· 26 km deep · released about 12 lb of TNT

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10 km30 km60 km120 km N San Germán Municipio 8 kmHormigueros Municipio 8 kmLajas Municipio 11 kmCabo Rojo Municipio 11 kmSabana Grande Municipio 16 kmMaricao Municipio 21 kmGuánica Municipio 22 kmLas Marías Municipio 22 kmAñasco 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
San Germán Municipio, 8 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3320 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 12 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 18.0615, -67.0980. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Germán Municipio, PR 8 km (5 mi) SW of here earthquakes near San Germán Municipio
Hormigueros Municipio, PR 8 km (5 mi) SSE of here earthquakes near Hormigueros Municipio
Lajas Municipio, PR 11 km (7 mi) NNW of here earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 11 km (7 mi) NE of here earthquakes near Cabo Rojo Municipio
Sabana Grande Municipio, PR 16 km (10 mi) W of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 21 km (13 mi) SW of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 2.2 7 km WSW of La Playa, Puerto Rico
  2. 3.0 16 km WSW of Stella, Puerto Rico
  3. 2.9 2 km NNW of Boquerón, Puerto Rico
  4. 2.1 0 km NNW of Hormigueros, Puerto Rico
  5. 1.6 7 km W of La Parguera, Puerto Rico
  6. 2.9 4 km WSW of Las Marías, Puerto Rico
  7. 1.6 Mona Passage
  8. 2.1 7 km SE of Maricao, Puerto Rico
  9. 1.7 10 km ESE of Maricao, Puerto Rico
  10. 1.8 3 km NW of Fuig, Puerto Rico
  11. 2.0 4 km W of Palmarejo, Puerto Rico
  12. 2.4 5 km WNW of Aguada, Puerto Rico
  13. 2.1 2 km SE of Palmarejo, Puerto Rico
  14. 2.3 12 km WNW of Adjuntas, Puerto Rico
  15. 2.2 10 km SW of La Playa, 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

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