QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

2 km NW of Galateo, Puerto Rico

· 114 km deep · released about 37 lb of TNT

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10 km30 km60 km120 km N Toa Alta Municipio 3 kmVega Alta Municipio 10 kmNaranjito Municipio 10 kmCorozal Municipio 10 kmDorado Municipio 11 kmBayamón Municipio 11 kmToa Baja Municipio 12 kmCataño Municipio 15 kmVega Baja Municipio 16 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
114 km below the surface
Felt
no reports yet
Nearest
Toa Alta Municipio, 3 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2619 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 37 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 5.8 410,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 290,000× the energy of this one
  3. Around the size people start to feel M 3.0 26× the energy of this one
  4. This earthquake M 2.1 about 37 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 18.3765, -66.2713. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Alta Municipio, PR 3 km (2 mi) WNW of here earthquakes near Toa Alta Municipio
Vega Alta Municipio, PR 10 km (6 mi) SE of here earthquakes near Vega Alta Municipio
Naranjito Municipio, PR 10 km (6 mi) N of here earthquakes near Naranjito Municipio
Corozal Municipio, PR 10 km (6 mi) NE of here earthquakes near Corozal Municipio
Dorado Municipio, PR 11 km (7 mi) S of here earthquakes near Dorado Municipio
Bayamón Municipio, PR 11 km (7 mi) WNW of here earthquakes near Bayamón Municipio

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

Aftershocks so far

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

  1. 2.0 37 km N of Brenas, Puerto Rico
  2. 1.6 2 km NNW of Jagual, Puerto Rico
  3. 1.6 1 km NNE of Parcelas Nuevas, Puerto Rico
  4. 2.5 25 km NNE of Brenas, Puerto Rico
  5. 1.9 11 km N of Dorado, Puerto Rico
  6. 2.1 11 km NNE of Garrochales, Puerto Rico
  7. 2.1 2 km NE of Jayuya, Puerto Rico
  8. 1.6 2 km NNW of Río Cañas Abajo, Puerto Rico
  9. 2.8 8 km NNE of Arecibo, Puerto Rico
  10. 2.3 2 km W of Bayamon, Puerto Rico
  11. 1.6 2 km SSE of Río Cañas Abajo, Puerto Rico
  12. 1.7 32 km N of Tierras Nuevas Poniente, Puerto Rico
  13. 2.0 1 km SE of Santa Isabel, Puerto Rico
  14. 2.5 16 km N of San Juan, Puerto Rico
  15. 2.0 1 km S of Manatí, 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 4.4 on 2018-12-09 — it released about 3,200 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.