QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km SE of Aguas Buenas, Puerto Rico

· 16 km deep · released about 49 lb of TNT

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10 km30 km60 km120 km N Aguas Buenas Municipio 4 kmCaguas Municipio 6 kmGuaynabo Municipio 11 kmCidra Municipio 11 kmGurabo Municipio 12 kmComerío Municipio 13 kmBayamón Municipio 14 kmTrujillo Alto Municipio 14 kmSan Lorenzo 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
16 km below the surface
Felt
no reports yet
Nearest
Aguas Buenas Municipio, 4 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 171 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 49 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 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 49 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 18.2498, -66.0953. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Aguas Buenas Municipio, PR 4 km (2 mi) ESE of here earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 6 km (4 mi) NW of here earthquakes near Caguas Municipio
Guaynabo Municipio, PR 11 km (7 mi) S of here earthquakes near Guaynabo Municipio
Cidra Municipio, PR 11 km (7 mi) NE of here earthquakes near Cidra Municipio
Gurabo Municipio, PR 12 km (8 mi) WSW of here earthquakes near Gurabo Municipio
Comerío Municipio, PR 13 km (8 mi) ENE of here earthquakes near Comerío Municipio

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

Aftershocks so far

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

  1. 2.8 15 km NNE of Dorado, Puerto Rico
  2. 3.1 0 km WNW of Monserrate, Puerto Rico
  3. 3.2 2 km NE of Parcelas Nuevas, Puerto Rico
  4. 2.7 2 km WSW of Bayamón, Puerto Rico
  5. 1.9 4 km NW of Orocovis, Puerto Rico
  6. 2.4 3 km E of G. L. Garcia, Puerto Rico
  7. 2.1 5 km S of Salinas, Puerto Rico
  8. 2.8 5 km S of Salinas, Puerto Rico
  9. 2.1 7 km SSW of Jagual, Puerto Rico
  10. 3.1 4 km N of San Juan, Puerto Rico
  11. 2.9 2 km NW of Sabana, Puerto Rico
  12. 2.1 7 km S of Salinas, Puerto Rico
  13. 2.2 5 km ENE of Comerío, Puerto Rico
  14. 2.2 3 km SSW of Salinas, Puerto Rico
  15. 2.0 8 km S 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 4,900 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.