QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5Md

2 km WSW of Las Piedras, Puerto Rico

· 7.0 km deep · released about 5.4 lb of TNT

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10 km30 km60 km120 km N Las Piedras Municipio 2 kmJuncos Municipio 6 kmSan Lorenzo Municipio 10 kmHumacao Municipio 12 kmYabucoa Municipio 13 kmGurabo Municipio 14 kmNaguabo Municipio 17 kmCanóvanas Municipio 17 kmCaguas Municipio 18 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 1.5 (Md)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Las Piedras Municipio, 2 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3533 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 18.1770, -65.8880. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Las Piedras Municipio, PR 2 km (1 mi) WSW of here earthquakes near Las Piedras Municipio
Juncos Municipio, PR 6 km (4 mi) SSE of here earthquakes near Juncos Municipio
San Lorenzo Municipio, PR 10 km (6 mi) ENE of here earthquakes near San Lorenzo Municipio
Humacao Municipio, PR 12 km (7 mi) WNW of here earthquakes near Humacao Municipio
Yabucoa Municipio, PR 13 km (8 mi) NNW of here earthquakes near Yabucoa Municipio
Gurabo Municipio, PR 14 km (9 mi) SE of here earthquakes near Gurabo Municipio

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

Aftershocks so far

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

  1. 2.7 29 km SE of El Negro, Puerto Rico
  2. 2.4 22 km SW of Esperanza, Puerto Rico
  3. 2.1 11 km S of Emajagua, Puerto Rico
  4. 2.4 12 km ESE of Candelero Arriba, Puerto Rico
  5. 1.8 3 km S of Cayey, Puerto Rico
  6. 2.5 3 km SE of Salinas, Puerto Rico
  7. 2.6 29 km SW of Esperanza, Puerto Rico
  8. 2.6 1 km NW of Bayamón, Puerto Rico
  9. 2.6 20 km SSE of Lamboglia, Puerto Rico
  10. 2.1 16 km SW of Esperanza, Puerto Rico
  11. 2.3 5 km N of Olimpo, Puerto Rico
  12. 2.3 23 km SSE of Lamboglia, Puerto Rico
  13. 2.4 24 km SW of Esperanza, Puerto Rico
  14. 1.6 15 km SW of Esperanza, Puerto Rico
  15. 3.0 6 km NNE of Levittown, 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 2016-12-05 — it released about 45,000 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.