QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

25 km NNE of Isabela, Puerto Rico

· 59 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Isabela Municipio 26 kmQuebradillas Municipio 27 kmCamuy Municipio 30 kmHatillo Municipio 33 kmAguadilla Municipio 34 kmMoca Municipio 40 kmArecibo Municipio 41 kmSan Sebastián Municipio 42 kmAguada Municipio 46 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
59 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 26 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2638 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 23 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 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 18.7085, -66.9311. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 26 km (16 mi) NNE of here earthquakes near Isabela Municipio
Quebradillas Municipio, PR 27 km (17 mi) N of here earthquakes near Quebradillas Municipio
Camuy Municipio, PR 30 km (19 mi) NNW of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 33 km (20 mi) NNW of here earthquakes near Hatillo Municipio
Aguadilla Municipio, PR 34 km (21 mi) NE of here earthquakes near Aguadilla Municipio
Moca Municipio, PR 40 km (25 mi) NNE of here earthquakes near Moca Municipio

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

Aftershocks so far

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

  1. 2.5 51 km NNW of San Antonio, Puerto Rico
  2. 2.8 56 km N of Isabela, Puerto Rico
  3. 2.0 43 km NNW of San Antonio, Puerto Rico
  4. 2.5 2 km NNE of Caban, Puerto Rico
  5. 2.0 26 km NNW of San Antonio, Puerto Rico
  6. 2.4 16 km NNW of Camuy, Puerto Rico
  7. 2.8 58 km N of Hatillo, Puerto Rico
  8. 2.7 61 km N of Hatillo, Puerto Rico
  9. 2.1 25 km NW of Aguadilla, Puerto Rico
  10. 2.4 47 km NW of San Antonio, Puerto Rico
  11. 2.6 22 km N of San Antonio, Puerto Rico
  12. 2.2 56 km N of Hatillo, Puerto Rico
  13. 2.5 45 km N of Carrizales, Puerto Rico
  14. 2.0 5 km NW of Caban, Puerto Rico
  15. 2.1 22 km N of Arecibo, 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 4.7 on 2017-07-17 — it released about 13,000 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.