QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

42 km N of San Juan, Puerto Rico

· 20 km deep · released about 800 lb of TNT

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10 km30 km60 km120 km N Dorado Municipio 43 kmToa Baja Municipio 44 kmCataño Municipio 45 kmSan Juan Municipio 48 kmVega Alta Municipio 50 kmLoíza Municipio 50 kmVega Baja Municipio 51 kmCarolina Municipio 54 kmToa Alta Municipio 55 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
20 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Dorado Municipio, 43 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 519 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 800 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 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 18.8483, -66.1577. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Dorado Municipio, PR 43 km (27 mi) NNE of here earthquakes near Dorado Municipio
Toa Baja Municipio, PR 44 km (27 mi) N of here earthquakes near Toa Baja Municipio
Cataño Municipio, PR 45 km (28 mi) N of here earthquakes near Cataño Municipio
San Juan Municipio, PR 48 km (30 mi) N of here earthquakes near San Juan Municipio
Vega Alta Municipio, PR 50 km (31 mi) NNE of here earthquakes near Vega Alta Municipio
Loíza Municipio, PR 50 km (31 mi) NNW of here earthquakes near Loíza Municipio

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

Aftershocks so far

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

  1. 3.0 73 km N of Tierras Nuevas Poniente, Puerto Rico
  2. 2.6 31 km N of Brenas, Puerto Rico
  3. 3.5 9 km NNW of San Juan, Puerto Rico
  4. 3.5 54 km N of Brenas, Puerto Rico
  5. 3.1 71 km N of Tierras Nuevas Poniente, Puerto Rico
  6. 3.2 8 km NE of Dorado, Puerto Rico
  7. 3.1 69 km N of Brenas, Puerto Rico
  8. 2.9 72 km N of Tierras Nuevas Poniente, Puerto Rico
  9. 2.8 75 km N of Tierras Nuevas Poniente, Puerto Rico
  10. 3.0 7 km NNE of Dorado, Puerto Rico
  11. 3.2 75 km N of San Juan, Puerto Rico
  12. 3.2 89 km N of San Juan, Puerto Rico
  13. 2.9 42 km N of Loíza, Puerto Rico
  14. 3.1 67 km N of Tierras Nuevas Poniente, Puerto Rico
  15. 3.2 73 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 600 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.