QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

9 km SSW of La Playa, Puerto Rico

· 20 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Añasco Municipio 14 kmRincón Municipio 14 kmHormigueros Municipio 15 kmAguada Municipio 19 kmSan Germán Municipio 24 kmCabo Rojo Municipio 24 kmMoca Municipio 25 kmLas Marías Municipio 27 kmSan Sebastián Municipio 31 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
20 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 14 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2751 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 5.7 970,000× the energy of this one
  3. Around the size people start to feel M 3.0 86× 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 18.2106, -67.2320. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Añasco Municipio, PR 14 km (8 mi) SW of here earthquakes near Añasco Municipio
Rincón Municipio, PR 14 km (9 mi) S of here earthquakes near Rincón Municipio
Hormigueros Municipio, PR 15 km (9 mi) NW of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 19 km (12 mi) SSW of here earthquakes near Aguada Municipio
San Germán Municipio, PR 24 km (15 mi) WNW of here earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 24 km (15 mi) NNW of here earthquakes near Cabo Rojo Municipio

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

Aftershocks so far

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

  1. 1.7 3 km S of Las Marías, Puerto Rico
  2. 1.8 6 km WNW of Puerto Real, Puerto Rico
  3. 2.3 19 km W of Rincón, Puerto Rico
  4. 1.8 2 km NW of Sabana Grande, Puerto Rico
  5. 1.7 1 km NNW of Lajas, Puerto Rico
  6. 1.6 2 km SSW of Palmarejo, Puerto Rico
  7. 2.6 16 km W of Puerto Real, Puerto Rico
  8. 2.6 35 km NW of Rincón, Puerto Rico
  9. 2.1 15 km SSW of Guánica, Puerto Rico
  10. 2.6 21 km W of Rincón, Puerto Rico
  11. 1.5 2 km S of La Parguera, Puerto Rico
  12. 1.5 6 km WSW of Las Marías, Puerto Rico
  13. 1.9 5 km SSW of Maricao, Puerto Rico
  14. 2.1 3 km NW of Mayagüez, Puerto Rico
  15. 2.4 Mona Passage

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 2017-10-14 — it released about 7,700 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.