QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

9 km NNW of Levittown, Puerto Rico

· 75 km deep · released about 38 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 8 kmToa Baja Municipio 9 kmCataño Municipio 12 kmVega Alta Municipio 17 kmToa Alta Municipio 19 kmSan Juan Municipio 19 kmBayamón Municipio 21 kmVega Baja Municipio 21 kmGuaynabo Municipio 23 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
75 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 8 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2647 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 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 18.5331, -66.2120. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 8 km (5 mi) NE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 9 km (5 mi) NNW of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 12 km (7 mi) NW of here earthquakes near Cataño Municipio
Vega Alta Municipio, PR 17 km (11 mi) NE of here earthquakes near Vega Alta Municipio
Toa Alta Municipio, PR 19 km (12 mi) N of here earthquakes near Toa Alta Municipio
San Juan Municipio, PR 19 km (12 mi) NW of here earthquakes near San Juan Municipio

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

Aftershocks so far

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

  1. 2.1 22 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 2.5 22 km N of Tierras Nuevas Poniente, Puerto Rico
  3. 2.8 2 km ESE of Levittown, Puerto Rico
  4. 2.5 1 km S of Cataño, Puerto Rico
  5. 2.1 21 km NNE of Tierras Nuevas Poniente, Puerto Rico
  6. 2.2 40 km N of Tierras Nuevas Poniente, Puerto Rico
  7. 2.0 6 km S of Caguas, Puerto Rico
  8. 2.4 1 km WNW of Pájaros, Puerto Rico
  9. 2.0 4 km NNE of Levittown, Puerto Rico
  10. 2.8 Puerto Rico region
  11. 2.6 2 km ESE of Mucarabones, Puerto Rico
  12. 2.4 51 km N of Brenas, Puerto Rico
  13. 1.8 9 km ENE of Jayuya, Puerto Rico
  14. 2.5 28 km NNE of San Juan, Puerto Rico
  15. 2.7 0 km S of Cataño, 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 4.8 on 2017-08-18 — it released about 12,000 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.