QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1Md

3 km SSE of Caguas, Puerto Rico

· 12 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caguas Municipio 2 kmSan Lorenzo Municipio 9 kmGurabo Municipio 9 kmAguas Buenas Municipio 11 kmJuncos Municipio 14 kmCidra Municipio 14 kmTrujillo Alto Municipio 15 kmCayey Municipio 17 kmLas Piedras Municipio 17 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
12 km below the surface
Felt
no reports yet
Nearest
Caguas Municipio, 2 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3742 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 43 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 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× 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 43 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 18.2061, -66.0353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Caguas Municipio, PR 2 km (1 mi) ESE of here earthquakes near Caguas Municipio
San Lorenzo Municipio, PR 9 km (6 mi) NW of here earthquakes near San Lorenzo Municipio
Gurabo Municipio, PR 9 km (6 mi) SW of here earthquakes near Gurabo Municipio
Aguas Buenas Municipio, PR 11 km (7 mi) ESE of here earthquakes near Aguas Buenas Municipio
Juncos Municipio, PR 14 km (8 mi) W of here earthquakes near Juncos Municipio
Cidra Municipio, PR 14 km (9 mi) ENE of here earthquakes near Cidra Municipio

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

Aftershocks so far

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

  1. 2.5 16 km S of Jobos, Puerto Rico
  2. 3.0 1 km SE of Vega Alta, Puerto Rico
  3. 2.5 3 km S of San Antonio, Puerto Rico
  4. 2.3 8 km SSW of Emajagua, Puerto Rico
  5. 2.7 1 km SSE of Corozal, Puerto Rico
  6. 2.0 12 km SE of El Negro, Puerto Rico
  7. 2.7 4 km NNW of Trujillo Alto, Puerto Rico
  8. 1.9 4 km WSW of Campo Rico, Puerto Rico
  9. 2.0 2 km ESE of Vázquez, Puerto Rico
  10. 2.9 4 km SSW of Barranquitas, Puerto Rico
  11. 2.2 3 km W of Aguas Buenas, Puerto Rico
  12. 2.2 1 km S of Playa Fortuna, Puerto Rico
  13. 3.1 24 km SSE of Arroyo, Puerto Rico
  14. 1.9 3 km SSE of Villalba, Puerto Rico
  15. 3.3 8 km NNE of Brenas, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.