QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

2 km NNW of La Plena, Puerto Rico

· 18 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 7 kmAibonito Municipio 9 kmSalinas Municipio 12 kmGuayama Municipio 13 kmCidra Municipio 13 kmCoamo Municipio 16 kmComerío Municipio 18 kmBarranquitas Municipio 18 kmArroyo 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
18 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 7 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 279 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 18.0665, -66.2098. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 7 km (5 mi) SW of here earthquakes near Cayey Municipio
Aibonito Municipio, PR 9 km (6 mi) SE of here earthquakes near Aibonito Municipio
Salinas Municipio, PR 12 km (7 mi) NNE of here earthquakes near Salinas Municipio
Guayama Municipio, PR 13 km (8 mi) NW of here earthquakes near Guayama Municipio
Cidra Municipio, PR 13 km (8 mi) SSW of here earthquakes near Cidra Municipio
Coamo Municipio, PR 16 km (10 mi) ESE of here earthquakes near Coamo Municipio

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

Aftershocks so far

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

  1. 2.0 0 km WSW of Aguas Buenas, Puerto Rico
  2. 2.5 14 km SSE of Ponce, Puerto Rico
  3. 1.9 0 km SW of G. L. Garcia, Puerto Rico
  4. 2.1 3 km NNW of Palomas, Puerto Rico
  5. 2.3 5 km W of Campo Rico, Puerto Rico
  6. 2.3 6 km NNE of Tallaboa Alta, Puerto Rico
  7. 1.6 1 km SW of G. L. Garcia, Puerto Rico
  8. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  9. 2.4 3 km SSE of Salinas, Puerto Rico
  10. 1.7 1 km WSW of G. L. Garcia, Puerto Rico
  11. 2.0 3 km SE of Tallaboa Alta, Puerto Rico
  12. 1.7 2 km NW of Las Ollas, Puerto Rico
  13. 2.0 1 km SSE of Cidra, Puerto Rico
  14. 1.9 3 km WNW of Orocovis, Puerto Rico
  15. 2.4 1 km WSW of Las Ochenta, 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 18,000 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.