QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2md

5 km SSE of Mora, Puerto Rico

· 94 km deep · released about 1,700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 8 kmMoca Municipio 9 kmQuebradillas Municipio 10 kmSan Sebastián Municipio 10 kmCamuy Municipio 15 kmAguadilla Municipio 16 kmAñasco Municipio 20 kmAguada Municipio 20 kmLares Municipio 21 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 3.2 (md)
Depth
94 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 8 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 619 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× more

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 18.4165, -67.0037. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 8 km (5 mi) S of here earthquakes near Isabela Municipio
Moca Municipio, PR 9 km (6 mi) ENE of here earthquakes near Moca Municipio
Quebradillas Municipio, PR 10 km (6 mi) SW of here earthquakes near Quebradillas Municipio
San Sebastián Municipio, PR 10 km (6 mi) NNW of here earthquakes near San Sebastián Municipio
Camuy Municipio, PR 15 km (9 mi) WSW of here earthquakes near Camuy Municipio
Aguadilla Municipio, PR 16 km (10 mi) ESE of here earthquakes near Aguadilla Municipio

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

Aftershocks so far

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

  1. 3.1 13 km W of Mayagüez, Puerto Rico
  2. 2.9 17 km N of Isabela, Puerto Rico
  3. 3.3 22 km W of Stella, Puerto Rico
  4. 2.3 2 km WNW of Indios, Puerto Rico
  5. 3.0 14 km SW of La Playa, Puerto Rico
  6. 2.6 5 km SSW of Palmarejo, Puerto Rico
  7. 2.9 21 km NW of Rincón, Puerto Rico
  8. 2.3 3 km NNW of La Parguera, Puerto Rico
  9. 2.9 2 km ENE of Maria Antonia, Puerto Rico
  10. 3.4 2 km NNE of La Parguera, Puerto Rico
  11. 2.4 6 km W of Fuig, Puerto Rico
  12. 2.0 2 km WSW of Fuig, Puerto Rico
  13. 3.4 19 km SSW of Stella, Puerto Rico
  14. 2.6 5 km NNW of Arecibo, Puerto Rico
  15. 2.4 2 km W of Indios, 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 5.6 on 2020-01-07 — it released about 4,400 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.