QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

1 km WSW of G. L. Garcia, Puerto Rico

· 24 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Cayey Municipio 4 kmCidra Municipio 8 kmCaguas Municipio 13 kmAibonito Municipio 15 kmAguas Buenas Municipio 15 kmSan Lorenzo Municipio 15 kmComerío Municipio 16 kmGuayama Municipio 16 kmArroyo 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 1.8 (md)
Depth
24 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 283 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 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× 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 18.1180, -66.1193. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 4 km (2 mi) ENE of here earthquakes near Cayey Municipio
Cidra Municipio, PR 8 km (5 mi) SE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 13 km (8 mi) SW of here earthquakes near Caguas Municipio
Aibonito Municipio, PR 15 km (10 mi) E of here earthquakes near Aibonito Municipio
Aguas Buenas Municipio, PR 15 km (10 mi) S of here earthquakes near Aguas Buenas Municipio
San Lorenzo Municipio, PR 15 km (10 mi) WSW of here earthquakes near San Lorenzo Municipio

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

Aftershocks so far

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

  1. 1.5 6 km S of Central Aguirre, Puerto Rico
  2. 2.5 4 km ESE of Pájaros, Puerto Rico
  3. 2.2 2 km WNW of Potala Pastillo, Puerto Rico
  4. 2.6 2 km WSW of G. L. Garcia, Puerto Rico
  5. 2.0 2 km SSW of Vázquez, Puerto Rico
  6. 2.0 11 km SSE of Punta Santiago, Puerto Rico
  7. 2.0 0 km WSW of Aguas Buenas, Puerto Rico
  8. 1.9 0 km SW of G. L. Garcia, Puerto Rico
  9. 2.1 3 km NNW of Palomas, Puerto Rico
  10. 2.3 5 km W of Campo Rico, Puerto Rico
  11. 1.6 1 km SW of G. L. Garcia, Puerto Rico
  12. 1.8 7 km ESE of G. L. Garcia, Puerto Rico
  13. 2.4 3 km SSE of Salinas, Puerto Rico
  14. 1.7 1 km WSW of G. L. Garcia, Puerto Rico
  15. 1.7 2 km NW of Las Ollas, 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 17,000 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.