QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

1 km SW of Magas Arriba, Puerto Rico

· 15 km deep · released about 9.3 lb of TNT

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10 km30 km60 km120 km N Guayanilla Municipio 2 kmPeñuelas Municipio 6 kmYauco Municipio 12 kmGuánica Municipio 17 kmPonce Municipio 18 kmAdjuntas Municipio 19 kmSabana Grande Municipio 20 kmMaricao Municipio 25 kmLajas Municipio 28 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
15 km below the surface
Felt
no reports yet
Nearest
Guayanilla Municipio, 2 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2343 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 18.0090, -66.7798. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 2 km (1 mi) ENE of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 6 km (4 mi) WSW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 12 km (7 mi) SE of here earthquakes near Yauco Municipio
Guánica Municipio, PR 17 km (10 mi) ENE of here earthquakes near Guánica Municipio
Ponce Municipio, PR 18 km (11 mi) W of here earthquakes near Ponce Municipio
Adjuntas Municipio, PR 19 km (12 mi) S of here earthquakes near Adjuntas Municipio

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

Aftershocks so far

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

  1. 2.8 3 km SSW of Magas Arriba, Puerto Rico
  2. 2.4 1 km W of Indios, Puerto Rico
  3. 3.0 2 km SSW of Indios, Puerto Rico
  4. 2.8 9 km S of Tallaboa, Puerto Rico
  5. 2.3 1 km ESE of Magas Arriba, Puerto Rico
  6. 1.9 8 km S of Guánica, Puerto Rico
  7. 2.3 1 km ESE of Magas Arriba, Puerto Rico
  8. 2.5 9 km SSE of Maria Antonia, Puerto Rico
  9. 3.1 1 km ESE of Guayanilla, Puerto Rico
  10. 2.9 15 km SSW of Tallaboa, Puerto Rico
  11. 2.5 2 km SSW of Magas Arriba, Puerto Rico
  12. 2.6 0 km SSW of Santo Domingo, Puerto Rico
  13. 2.3 12 km SSW of Tallaboa, Puerto Rico
  14. 1.6 10 km SSE of Guánica, Puerto Rico
  15. 2.9 10 km SSW of Tallaboa, 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 6.4 on 2020-01-07 — it released about 13,000,000 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.