QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

68 km N of San Juan, Puerto Rico

· 23 km deep · released about 1,000 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 69 kmToa Baja Municipio 70 kmCataño Municipio 71 kmLoíza Municipio 74 kmSan Juan Municipio 74 kmVega Alta Municipio 75 kmVega Baja Municipio 76 kmCarolina Municipio 78 kmManatí Municipio 81 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 3.0 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Dorado Municipio, 69 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 476 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 1,000 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,000 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 19.0858, -66.1278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 69 km (43 mi) NNE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 70 km (44 mi) N of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 71 km (44 mi) N of here earthquakes near Cataño Municipio
Loíza Municipio, PR 74 km (46 mi) NNW of here earthquakes near Loíza Municipio
San Juan Municipio, PR 74 km (46 mi) N of here earthquakes near San Juan Municipio
Vega Alta Municipio, PR 75 km (47 mi) NNE of here earthquakes near Vega Alta 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. 3.0 67 km NNE of San Juan, Puerto Rico
  2. 3.0 38 km NNW of Brenas, Puerto Rico
  3. 2.8 80 km N of San Juan, Puerto Rico
  4. 3.0 74 km N of San Juan, Puerto Rico
  5. 3.0 46 km N of San Juan, Puerto Rico
  6. 3.4 101 km N of San Juan, Puerto Rico
  7. 3.0 68 km N of Tierras Nuevas Poniente, Puerto Rico
  8. 3.4 99 km N of San Juan, Puerto Rico
  9. 3.0 53 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 2.8 83 km N of San Juan, Puerto Rico
  11. 3.2 77 km N of Brenas, Puerto Rico
  12. 3.1 56 km N of San Juan, Puerto Rico
  13. 3.0 66 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 3.3 93 km N of Brenas, Puerto Rico
  15. 3.1 81 km N of Brenas, 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 470 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.