QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

65 km N of Loíza, Puerto Rico

· 55 km deep · released about 24 lb of TNT

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10 km30 km60 km120 km N Loíza Municipio 65 kmSan Juan Municipio 70 kmCarolina Municipio 70 kmCataño Municipio 70 kmToa Baja Municipio 71 kmRío Grande Municipio 72 kmDorado Municipio 73 kmLuquillo Municipio 75 kmFajardo Municipio 77 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
55 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 65 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2929 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 24 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 5.8 640,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 450,000× the energy of this one
  3. Around the size people start to feel M 3.0 40× the energy of this one
  4. This earthquake M 1.9 about 24 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 19.0228, -65.8756. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Loíza Municipio, PR 65 km (40 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 70 km (43 mi) NNE of here earthquakes near San Juan Municipio
Carolina Municipio, PR 70 km (44 mi) N of here earthquakes near Carolina Municipio
Cataño Municipio, PR 70 km (44 mi) NNE of here earthquakes near Cataño Municipio
Toa Baja Municipio, PR 71 km (44 mi) NNE of here earthquakes near Toa Baja Municipio
Río Grande Municipio, PR 72 km (45 mi) N of here earthquakes near Río Grande 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. 2.2 34 km N of Loíza, Puerto Rico
  2. 2.8 76 km NNE of Luquillo, Puerto Rico
  3. 2.8 57 km N of Brenas, Puerto Rico
  4. 2.6 60 km N of San Juan, Puerto Rico
  5. 1.7 33 km N of San Juan, Puerto Rico
  6. 3.1 92 km N of San Juan, Puerto Rico
  7. 2.7 70 km N of Brenas, Puerto Rico
  8. 2.4 81 km N of San Juan, Puerto Rico
  9. 2.8 37 km N of San Juan, Puerto Rico
  10. 2.8 82 km N of Suárez, Puerto Rico
  11. 2.7 72 km N of San Juan, Puerto Rico
  12. 1.8 31 km N of Loíza, Puerto Rico
  13. 2.8 40 km N of Brenas, Puerto Rico
  14. 2.4 26 km N of San Juan, Puerto Rico
  15. 3.2 103 km N of San Juan, 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 20,000 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.