QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km NW of Bayamon, Puerto Rico

· 73 km deep · released about 47 lb of TNT

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10 km30 km60 km120 km N Cidra Municipio 4 kmAguas Buenas Municipio 7 kmCaguas Municipio 8 kmCayey Municipio 10 kmComerío Municipio 10 kmAibonito Municipio 16 kmSan Lorenzo Municipio 17 kmGuaynabo Municipio 17 kmNaranjito 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
73 km below the surface
Felt
no reports yet
Nearest
Cidra Municipio, 4 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3084 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 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 18.1926, -66.1273. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Cidra Municipio, PR 4 km (3 mi) ENE of here earthquakes near Cidra Municipio
Aguas Buenas Municipio, PR 7 km (4 mi) S of here earthquakes near Aguas Buenas Municipio
Caguas Municipio, PR 8 km (5 mi) WSW of here earthquakes near Caguas Municipio
Cayey Municipio, PR 10 km (6 mi) NNE of here earthquakes near Cayey Municipio
Comerío Municipio, PR 10 km (6 mi) ESE of here earthquakes near Comerío Municipio
Aibonito Municipio, PR 16 km (10 mi) ENE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 1.8 6 km SSW of Lamboglia, Puerto Rico
  2. 1.9 3 km NNE of Río Cañas Abajo, Puerto Rico
  3. 1.6 2 km W of Potala Pastillo, Puerto Rico
  4. 2.4 8 km SSE of Jauca, Puerto Rico
  5. 1.8 2 km E of Aguilita, Puerto Rico
  6. 2.4 5 km SE of Arroyo, Puerto Rico
  7. 1.7 5 km SSW of Lamboglia, Puerto Rico
  8. 2.2 2 km E of Arroyo, Puerto Rico
  9. 2.2 5 km SSW of Lamboglia, Puerto Rico
  10. 2.1 4 km ESE of Arroyo, Puerto Rico
  11. 1.8 2 km S of Palmas, Puerto Rico
  12. 1.6 4 km SSE of Palmas, Puerto Rico
  13. 2.0 4 km S of Palmas, Puerto Rico
  14. 1.5 5 km SSW of Lamboglia, Puerto Rico
  15. 1.9 1 km NNE of Buena Vista, 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 5,100 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.