QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

4 km ESE of Ponce, Puerto Rico

· 24 km deep · released about 11 lb of TNT

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10 km30 km60 km120 km N Ponce Municipio 3 kmJuana Díaz Municipio 9 kmPeñuelas Municipio 16 kmVillalba Municipio 19 kmSanta Isabel Municipio 21 kmGuayanilla Municipio 23 kmJayuya Municipio 24 kmCoamo Municipio 26 kmAdjuntas 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
24 km below the surface
Felt
no reports yet
Nearest
Ponce Municipio, 3 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2575 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× 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 17.9953, -66.5796. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ponce Municipio, PR 3 km (2 mi) ESE of here earthquakes near Ponce Municipio
Juana Díaz Municipio, PR 9 km (6 mi) W of here earthquakes near Juana Díaz Municipio
Peñuelas Municipio, PR 16 km (10 mi) ESE of here earthquakes near Peñuelas Municipio
Villalba Municipio, PR 19 km (12 mi) SW of here earthquakes near Villalba Municipio
Santa Isabel Municipio, PR 21 km (13 mi) WNW of here earthquakes near Santa Isabel Municipio
Guayanilla Municipio, PR 23 km (14 mi) E of here earthquakes near Guayanilla Municipio

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

Aftershocks so far

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

  1. 2.1 14 km SSE of Guánica, Puerto Rico
  2. 2.0 12 km SSE of Ponce, Puerto Rico
  3. 2.0 2 km NNE of Sabana Grande, Puerto Rico
  4. 2.0 12 km S of Ponce, Puerto Rico
  5. 1.6 6 km WSW of Guánica, Puerto Rico
  6. 1.6 12 km SSE of Ponce, Puerto Rico
  7. 1.6 10 km SSW of Potala Pastillo, Puerto Rico
  8. 1.8 12 km SSE of Ponce, Puerto Rico
  9. 2.3 8 km SE of Tallaboa, Puerto Rico
  10. 1.8 1 km E of Lluveras, Puerto Rico
  11. 2.0 1 km SE of Maricao, Puerto Rico
  12. 1.7 13 km SW of Potala Pastillo, Puerto Rico
  13. 1.5 10 km SSE of Ponce, Puerto Rico
  14. 1.9 12 km SSE of Ponce, Puerto Rico
  15. 2.2 3 km ESE of Maricao, 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 4.6 on 2019-03-12 — it released about 21,000 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.