QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

100 km N of Isabela, Puerto Rico

· 34 km deep · released about 720 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 103 kmQuebradillas Municipio 104 kmCamuy Municipio 106 kmAguadilla Municipio 106 kmHatillo Municipio 107 kmBarceloneta Municipio 108 kmArecibo Municipio 109 kmManatí Municipio 113 kmMoca Municipio 116 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 2.9 (md)
Depth
34 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 103 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2524 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 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 15,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.3× the energy of this one
  4. This earthquake M 2.9 about 720 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 19.3976, -66.8718. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 103 km (64 mi) N of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 104 km (64 mi) N of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 106 km (66 mi) N of here earthquakes near Camuy Municipio
Aguadilla Municipio, PR 106 km (66 mi) NNE of here earthquakes near Aguadilla Municipio
Hatillo Municipio, PR 107 km (66 mi) N of here earthquakes near Hatillo Municipio
Barceloneta Municipio, PR 108 km (67 mi) NNW of here earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 2.2 63 km N of San Antonio, Puerto Rico
  2. 2.5 81 km N of Isabela, Puerto Rico
  3. 2.7 87 km N of San Antonio, Puerto Rico
  4. 2.8 77 km N of Isabela, Puerto Rico
  5. 3.2 63 km N of Isabela, Puerto Rico
  6. 2.9 94 km NNW of San Antonio, Puerto Rico
  7. 3.1 119 km N of Hatillo, Puerto Rico
  8. 2.5 71 km NNW of San Antonio, Puerto Rico
  9. 3.0 74 km N of San Antonio, Puerto Rico
  10. 2.5 79 km NNW of San Antonio, Puerto Rico
  11. 2.7 81 km N of San Antonio, Puerto Rico
  12. 2.8 Mona Passage
  13. 2.6 104 km NNW of San Antonio, Puerto Rico
  14. 2.6 87 km N of Isabela, Puerto Rico
  15. 2.8 90 km N of Isabela, 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 2019-09-25 — it released about 760 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.