QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Puerto Rico region

· 34 km deep · released about 1,100 lb of TNT

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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
34 km below the surface
Felt
no reports yet
Nearest
Isabela Municipio, 141 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2053 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 1,100 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 6.7 320,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× 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 1,100 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 19.5536, -66.2996. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Isabela Municipio, PR 141 km (87 mi) NNE of here earthquakes near Isabela Municipio
Aguadilla Municipio, PR 149 km (92 mi) NE of here earthquakes near Aguadilla Municipio

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

Aftershocks so far

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

  1. 3.1 80 km N of Brenas, Puerto Rico
  2. 3.7 103 km N of Brenas, Puerto Rico
  3. 3.1 115 km N of Brenas, Puerto Rico
  4. 3.3 100 km N of San Juan, Puerto Rico
  5. 3.9 78 km N of San Juan, Puerto Rico
  6. 3.5 121 km N of San Juan, Puerto Rico
  7. 3.6 94 km N of Brenas, Puerto Rico
  8. 3.4 121 km N of Brenas, Puerto Rico
  9. 3.5 88 km N of Arecibo, Puerto Rico
  10. 3.7 107 km N of Brenas, Puerto Rico
  11. 3.5 72 km N of Brenas, Puerto Rico
  12. 3.3 72 km N of Brenas, Puerto Rico
  13. 3.0 80 km N of Tierras Nuevas Poniente, Puerto Rico
  14. 3.6 121 km N of San Juan, Puerto Rico
  15. 3.4 80 km N of Tierras Nuevas Poniente, 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 4.4 on 2016-10-23 — it released about 110 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.