QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

15 km S of Ponce, Puerto Rico

· 3.0 km deep · released about 7.1 lb of TNT

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10 km30 km60 km120 km N Ponce Municipio 15 kmPeñuelas Municipio 19 kmJuana Díaz Municipio 21 kmGuayanilla Municipio 22 kmSanta Isabel Municipio 29 kmGuánica Municipio 30 kmYauco Municipio 32 kmVillalba Municipio 34 kmAdjuntas Municipio 36 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 1.6 (md)
Depth
3.0 km below the surface
Felt
no reports yet
Nearest
Ponce Municipio, 15 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2724 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 7.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.1 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 17.8746, -66.6456. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Ponce Municipio, PR 15 km (9 mi) SSW of here earthquakes near Ponce Municipio
Peñuelas Municipio, PR 19 km (12 mi) SSE of here earthquakes near Peñuelas Municipio
Juana Díaz Municipio, PR 21 km (13 mi) SW of here earthquakes near Juana Díaz Municipio
Guayanilla Municipio, PR 22 km (14 mi) SE of here earthquakes near Guayanilla Municipio
Santa Isabel Municipio, PR 29 km (18 mi) WSW of here earthquakes near Santa Isabel Municipio
Guánica Municipio, PR 30 km (19 mi) ESE of here earthquakes near Guánica Municipio

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

Aftershocks so far

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

  1. 1.7 3 km NNE of Río Cañas Abajo, Puerto Rico
  2. 1.9 6 km SW of Adjuntas, Puerto Rico
  3. 1.8 10 km SSW of Guánica, Puerto Rico
  4. 1.8 4 km W of Capitanejo, Puerto Rico
  5. 2.1 1 km N of Aguilita, Puerto Rico
  6. 2.1 0 km E of Yauco, Puerto Rico
  7. 1.7 13 km SSW of Guánica, Puerto Rico
  8. 1.8 3 km N of Yauco, Puerto Rico
  9. 1.5 5 km SE of Adjuntas, Puerto Rico
  10. 1.6 7 km NE of Sabana Grande, Puerto Rico
  11. 2.0 4 km SE of Maria Antonia, Puerto Rico
  12. 1.9 3 km S of Maricao, Puerto Rico
  13. 1.8 3 km SW of Maricao, Puerto Rico
  14. 2.1 18 km S of Guánica, Puerto Rico
  15. 1.7 2 km NNE of La Parguera, 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 34,000 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.