QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

87 km N of Brenas, Puerto Rico

Yes. A magnitude 2.9 earthquake was recorded 87 km N of Brenas, Puerto Rico, 96 km (59 mi) N of San Juan, PR, at 12:19 pm AST on 14 April 2023 (16:19 UTC), 19 km deep.

96 km (59 mi) N of San Juan, PR

· 19 km deep · released about 570 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 86 kmToa Baja Municipio 88 kmCataño Municipio 90 kmVega Baja Municipio 90 kmVega Alta Municipio 91 kmBarceloneta Municipio 93 kmSan Juan Municipio 93 kmManatí Municipio 94 kmLoíza Municipio 94 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
19 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 86 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1307 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 22 km (14 mi) from the epicentre. 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 570 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 27,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 19,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.7× the energy of this one
  4. This earthquake M 2.9 about 570 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 840 times the energy of this one.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.9 78 km N of Arecibo, Puerto Rico · 44 km W of this epicentre
  2. 5.7 78 km N of Tierras Nuevas Poniente, Puerto Rico · 35 km WSW of this epicentre
  3. 5.5 64 km N of Tierras Nuevas Poniente, Puerto Rico · 35 km SW of this epicentre
  4. 5.4 106 km N of Brenas, Puerto Rico · 26 km NW of this epicentre
  5. 5.1 66 km N of Brenas, Puerto Rico · 25 km SW 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 19.2492, -66.2302. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Dorado Municipio, PR 86 km (54 mi) S earthquakes near Dorado Municipio
Toa Baja Municipio, PR 88 km (55 mi) S earthquakes near Toa Baja Municipio
Cataño Municipio, PR 90 km (56 mi) S earthquakes near Cataño Municipio
Vega Baja Municipio, PR 90 km (56 mi) SSW earthquakes near Vega Baja Municipio
Vega Alta Municipio, PR 91 km (57 mi) S earthquakes near Vega Alta Municipio
Barceloneta Municipio, PR 93 km (58 mi) SSW earthquakes near Barceloneta Municipio

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

Aftershocks so far

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

  1. 3.4 Puerto Rico region
  2. 3.1 51 km N of San Juan, Puerto Rico
  3. 3.4 81 km N of Arecibo, Puerto Rico
  4. 3.4 59 km N of Tierras Nuevas Poniente, Puerto Rico
  5. 3.4 66 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 3.9 118 km N of Brenas, Puerto Rico
  7. 3.7 127 km N of Brenas, Puerto Rico
  8. 3.2 63 km NNE of San Juan, Puerto Rico
  9. 3.7 113 km N of Suárez, Puerto Rico
  10. 3.4 70 km NNE of Arecibo, Puerto Rico
  11. 3.4 Puerto Rico region
  12. 3.3 49 km N of San Juan, Puerto Rico
  13. 3.2 78 km N of San Juan, Puerto Rico
  14. 3.3 Puerto Rico region
  15. 3.0 Puerto Rico region

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.