QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

1 km ENE of Cayey, Puerto Rico

· 25 km deep · released about 91 lb of TNT

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10 km30 km60 km120 km N Cayey Municipio 1 kmCidra Municipio 7 kmAibonito Municipio 12 kmComerío Municipio 14 kmCaguas Municipio 15 kmGuayama Municipio 16 kmAguas Buenas Municipio 16 kmBarranquitas Municipio 19 kmSan Lorenzo Municipio 19 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 2.3 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 1 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 983 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 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 91 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 18.1148, -66.1548. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 1 km (1 mi) NNW of here earthquakes near Cayey Municipio
Cidra Municipio, PR 7 km (4 mi) S of here earthquakes near Cidra Municipio
Aibonito Municipio, PR 12 km (7 mi) E of here earthquakes near Aibonito Municipio
Comerío Municipio, PR 14 km (9 mi) SSE of here earthquakes near Comerío Municipio
Caguas Municipio, PR 15 km (10 mi) SW of here earthquakes near Caguas Municipio
Guayama Municipio, PR 16 km (10 mi) N of here earthquakes near Guayama 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. 2.2 7 km SSE of Salinas, Puerto Rico
  2. 1.5 5 km SE of Cayey, Puerto Rico
  3. 2.8 4 km WSW of Central Aguirre, Puerto Rico
  4. 2.1 4 km NW of Orocovis, Puerto Rico
  5. 3.2 2 km SSE of Coto Norte, Puerto Rico
  6. 2.6 4 km NW of Orocovis, Puerto Rico
  7. 3.0 1 km SSE of Corozal, Puerto Rico
  8. 2.2 5 km SSE of Salinas, Puerto Rico
  9. 2.0 6 km SSE of Salinas, Puerto Rico
  10. 2.5 3 km ESE of Orocovis, Puerto Rico
  11. 2.2 6 km SSE of Salinas, Puerto Rico
  12. 2.8 5 km S of Punta Santiago, Puerto Rico
  13. 2.0 5 km SSE of Salinas, Puerto Rico
  14. 2.1 5 km WSW of Central Aguirre, Puerto Rico
  15. 2.1 4 km SSE of Salinas, 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 2,600 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.