QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

1 km SSW of Candelaria Arenas, Puerto Rico

· 13 km deep · released about 25 lb of TNT

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10 km30 km60 km120 km N Toa Alta Municipio 5 kmToa Baja Municipio 6 kmDorado Municipio 9 kmBayamón Municipio 9 kmCataño Municipio 9 kmVega Alta Municipio 12 kmNaranjito Municipio 13 kmGuaynabo Municipio 14 kmCorozal 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 1.9 (md)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Toa Alta Municipio, 5 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 157 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 18.4067, -66.2240. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Toa Alta Municipio, PR 5 km (3 mi) NNE of here earthquakes near Toa Alta Municipio
Toa Baja Municipio, PR 6 km (4 mi) SSW of here earthquakes near Toa Baja Municipio
Dorado Municipio, PR 9 km (5 mi) SSE of here earthquakes near Dorado Municipio
Bayamón Municipio, PR 9 km (5 mi) NW of here earthquakes near Bayamón Municipio
Cataño Municipio, PR 9 km (6 mi) WSW of here earthquakes near Cataño Municipio
Vega Alta Municipio, PR 12 km (8 mi) ESE of here earthquakes near Vega Alta Municipio

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

Aftershocks so far

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

  1. 3.1 0 km WNW of Monserrate, Puerto Rico
  2. 3.2 2 km NE of Parcelas Nuevas, Puerto Rico
  3. 2.7 2 km WSW of Bayamón, Puerto Rico
  4. 1.9 4 km NW of Orocovis, Puerto Rico
  5. 2.4 3 km E of G. L. Garcia, Puerto Rico
  6. 3.3 35 km N of Brenas, Puerto Rico
  7. 2.9 12 km NNE of Tierras Nuevas Poniente, Puerto Rico
  8. 2.1 7 km SSW of Jagual, Puerto Rico
  9. 2.7 30 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 3.1 4 km N of San Juan, Puerto Rico
  11. 2.9 2 km NW of Sabana, Puerto Rico
  12. 2.2 5 km ENE of Comerío, Puerto Rico
  13. 1.9 1 km E of Salinas, Puerto Rico
  14. 2.2 3 km W of Vázquez, Puerto Rico
  15. 2.7 15 km N of San Juan, 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 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.