QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

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

· 27 km deep · released about 44 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Cayey Municipio 6 kmCidra Municipio 10 kmCaguas Municipio 12 kmSan Lorenzo Municipio 13 kmGuayama Municipio 16 kmAguas Buenas Municipio 16 kmArroyo Municipio 17 kmPatillas Municipio 17 kmAibonito 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 2.1 (md)
Depth
27 km below the surface
Felt
no reports yet
Nearest
Cayey Municipio, 6 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2866 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 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 18.1140, -66.0953. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cayey Municipio, PR 6 km (4 mi) E of here earthquakes near Cayey Municipio
Cidra Municipio, PR 10 km (6 mi) SE of here earthquakes near Cidra Municipio
Caguas Municipio, PR 12 km (7 mi) SSW of here earthquakes near Caguas Municipio
San Lorenzo Municipio, PR 13 km (8 mi) WSW of here earthquakes near San Lorenzo Municipio
Guayama Municipio, PR 16 km (10 mi) NNE of here earthquakes near Guayama Municipio
Aguas Buenas Municipio, PR 16 km (10 mi) SSE of here earthquakes near Aguas Buenas 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. 2.1 10 km S of Emajagua, Puerto Rico
  2. 2.8 9 km SSW of Emajagua, Puerto Rico
  3. 1.8 9 km S of Emajagua, Puerto Rico
  4. 2.5 3 km SE of Bayamón, Puerto Rico
  5. 1.7 1 km S of G. L. Garcia, Puerto Rico
  6. 1.8 2 km ENE of Parcelas Nuevas, Puerto Rico
  7. 2.0 1 km SSW of Potala Pastillo, Puerto Rico
  8. 2.5 13 km NW of Loíza, Puerto Rico
  9. 2.0 8 km NE of San Juan, Puerto Rico
  10. 1.5 1 km SE of Aguas Buenas, Puerto Rico
  11. 1.9 2 km W of Jauca, Puerto Rico
  12. 2.6 0 km ENE of Sabana Seca, Puerto Rico
  13. 2.4 2 km SSE of Río Cañas Abajo, Puerto Rico
  14. 1.8 7 km W of Orocovis, Puerto Rico
  15. 1.9 3 km W of Campo Rico, 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 5,400 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.