QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

4 km NNW of Yaurel, Puerto Rico

· 15 km deep · released about 15 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 9 kmArroyo Municipio 10 kmGuayama Municipio 11 kmPatillas Municipio 11 kmSan Lorenzo Municipio 14 kmCidra Municipio 16 kmCaguas Municipio 17 kmMaunabo Municipio 20 kmAibonito Municipio 21 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 1.8 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 9 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 672 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 730,000× the energy of this one
  3. Around the size people start to feel M 3.0 65× the energy of this one
  4. This earthquake M 1.8 about 15 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 18.0587, -66.0762. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 9 km (6 mi) ESE of here earthquakes near Cayey Municipio
Arroyo Municipio, PR 10 km (6 mi) NNW of here earthquakes near Arroyo Municipio
Guayama Municipio, PR 11 km (7 mi) NE of here earthquakes near Guayama Municipio
Patillas Municipio, PR 11 km (7 mi) NW of here earthquakes near Patillas Municipio
San Lorenzo Municipio, PR 14 km (9 mi) SW of here earthquakes near San Lorenzo Municipio
Cidra Municipio, PR 16 km (10 mi) SE of here earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 2.1 22 km S of Lamboglia, Puerto Rico
  2. 2.2 9 km S of Emajagua, Puerto Rico
  3. 2.1 0 km N of Potala Pastillo, Puerto Rico
  4. 1.6 2 km SSE of Lamboglia, Puerto Rico
  5. 2.4 0 km SW of Santa Isabel, Puerto Rico
  6. 2.4 0 km NW of Santa Isabel, Puerto Rico
  7. 2.5 18 km WSW of Esperanza, Puerto Rico
  8. 2.1 4 km WNW of Olimpo, Puerto Rico
  9. 2.4 3 km SSW of Playita Cortada, Puerto Rico
  10. 2.3 1 km WSW of Vázquez, Puerto Rico
  11. 3.0 1 km NNW of Ingenio, Puerto Rico
  12. 3.1 1 km S of Toa Alta, Puerto Rico
  13. 3.0 2 km ENE of Cidra, Puerto Rico
  14. 2.7 2 km NNW of Coco, Puerto Rico
  15. 2.4 18 km S of Emajagua, 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 16,000 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.