QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

92 km N of San Juan, Puerto Rico

· 97 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Dorado Municipio 94 kmToa Baja Municipio 95 kmCataño Municipio 96 kmLoíza Municipio 97 kmSan Juan Municipio 98 kmVega Baja Municipio 100 kmVega Alta Municipio 100 kmCarolina Municipio 101 kmManatí Municipio 104 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 3.1 (md)
Depth
97 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 94 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2794 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 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 260,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,200× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.4× more

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 19.3021, -66.0906. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 94 km (58 mi) N of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 95 km (59 mi) N of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 96 km (59 mi) N of here earthquakes near Cataño Municipio
Loíza Municipio, PR 97 km (60 mi) N of here earthquakes near Loíza Municipio
San Juan Municipio, PR 98 km (61 mi) N of here earthquakes near San Juan Municipio
Vega Baja Municipio, PR 100 km (62 mi) NNE of here earthquakes near Vega Baja 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. 2.9 88 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 3.1 90 km N of Tierras Nuevas Poniente, Puerto Rico
  3. 2.5 70 km N of San Juan, Puerto Rico
  4. 1.7 50 km N of San Juan, Puerto Rico
  5. 2.7 68 km N of Suárez, Puerto Rico
  6. 2.6 68 km N of Suárez, Puerto Rico
  7. 2.8 93 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 2.8 73 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 2.8 107 km NNE of San Juan, Puerto Rico
  10. 2.6 111 km NNE of San Juan, Puerto Rico
  11. 2.7 89 km N of Brenas, Puerto Rico
  12. 2.8 71 km N of San Juan, Puerto Rico
  13. 2.7 78 km N of San Juan, Puerto Rico
  14. 2.6 70 km N of San Juan, Puerto Rico
  15. 2.7 72 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 370 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.