QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

100 km N of Isabela, Puerto Rico

· 42 km deep · released about 510 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 102 kmAguadilla Municipio 104 kmQuebradillas Municipio 104 kmCamuy Municipio 107 kmHatillo Municipio 109 kmArecibo Municipio 113 kmBarceloneta Municipio 113 kmMoca Municipio 115 kmAguada 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 2.8 (md)
Depth
42 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 102 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2473 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 510 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 30,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 21,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 510 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 19.4045, -66.9820. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 102 km (64 mi) N of here earthquakes near Isabela Municipio
Aguadilla Municipio, PR 104 km (65 mi) N of here earthquakes near Aguadilla Municipio
Quebradillas Municipio, PR 104 km (65 mi) N of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 107 km (67 mi) N of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 109 km (68 mi) N of here earthquakes near Hatillo Municipio
Arecibo Municipio, PR 113 km (70 mi) NNW of here earthquakes near Arecibo Municipio

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

Aftershocks so far

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

  1. 3.2 100 km NNW of San Antonio, Puerto Rico
  2. 3.1 75 km N of San Antonio, Puerto Rico
  3. 3.2 57 km N of San Antonio, Puerto Rico
  4. 3.4 100 km NNW of San Antonio, Puerto Rico
  5. 3.2 77 km NNW of San Antonio, Puerto Rico
  6. 2.8 107 km N of San Antonio, Puerto Rico
  7. 3.1 73 km N of San Antonio, Puerto Rico
  8. 3.0 92 km NNW of San Antonio, Puerto Rico
  9. 3.0 86 km N of San Antonio, Puerto Rico
  10. 3.2 Mona Passage
  11. 3.5 89 km NNW of San Antonio, Puerto Rico
  12. 3.4 85 km N of San Antonio, Puerto Rico
  13. 4.0 82 km N of San Antonio, Puerto Rico
  14. 2.8 95 km NNW of San Antonio, Puerto Rico
  15. 2.9 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 6.0 on 2019-09-24 — it released about 59,000 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.