QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

72 km N of Loíza, Puerto Rico

Yes. A magnitude 2.2 earthquake was recorded 72 km N of Loíza, Puerto Rico, 79 km (49 mi) NNE of San Juan, PR, at 10:13 pm AST on 30 July 2019 (02:13 UTC), 47 km deep.

79 km (49 mi) NNE of San Juan, PR

· 47 km deep · released about 67 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Loíza Municipio 72 kmSan Juan Municipio 77 kmCataño Municipio 77 kmCarolina Municipio 78 kmToa Baja Municipio 78 kmDorado Municipio 79 kmRío Grande Municipio 80 kmLuquillo Municipio 82 kmFajardo Municipio 84 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 2.2 (md)
Depth
47 km below the surface
Felt
no reports yet
Nearest
Loíza Municipio, 72 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2661 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 67 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 160,000× the energy of this one
  3. Around the size people start to feel M 3.0 14× the energy of this one
  4. This earthquake M 2.2 about 67 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.8 on 2017-08-18 — about 7,200 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 92 km N of Suárez, Puerto Rico · 25 km NE of this epicentre
  2. 5.0 73 km NNE of Vieques, Puerto Rico · 41 km ESE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 19.0888, -65.8768. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Loíza Municipio, PR 72 km (45 mi) S earthquakes near Loíza Municipio
San Juan Municipio, PR 77 km (48 mi) SSW earthquakes near San Juan Municipio
Cataño Municipio, PR 77 km (48 mi) SSW earthquakes near Cataño Municipio
Carolina Municipio, PR 78 km (48 mi) S earthquakes near Carolina Municipio
Toa Baja Municipio, PR 78 km (48 mi) SSW earthquakes near Toa Baja Municipio
Dorado Municipio, PR 79 km (49 mi) SSW earthquakes near Dorado Municipio

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

Aftershocks so far

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

  1. 2.8 75 km N of San Juan, Puerto Rico
  2. 3.0 89 km N of Brenas, Puerto Rico
  3. 1.8 77 km N of San Juan, Puerto Rico
  4. 1.9 77 km N of San Juan, Puerto Rico
  5. 2.1 81 km NNE of Suárez, Puerto Rico
  6. 2.8 94 km N of San Juan, Puerto Rico
  7. 2.5 73 km N of San Juan, Puerto Rico
  8. 2.8 84 km NNE of Vieques, Puerto Rico
  9. 2.2 69 km NNE of Luquillo, Puerto Rico
  10. 2.6 76 km N of San Juan, Puerto Rico
  11. 2.5 76 km N of San Juan, Puerto Rico
  12. 2.6 104 km N of Suárez, Puerto Rico
  13. 3.3 68 km N of Brenas, Puerto Rico
  14. 2.1 79 km N of San Juan, Puerto Rico
  15. 2.5 78 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.