QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5md

46 km WSW of Stella, Puerto Rico

· 64 km deep · released about 2.6 tons of TNT

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10 km30 km60 km120 km N Mayagüez Municipio 26 kmRincón Municipio 47 kmCabo Rojo Municipio 52 kmAguada Municipio 55 kmHormigueros Municipio 56 kmAñasco Municipio 57 kmAguadilla Municipio 64 kmSan Germán Municipio 65 kmMoca Municipio 65 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 3.5 (md)
Depth
64 km below the surface
Felt
5 reports · strongest reported intensity II
Nearest
Mayagüez Municipio, 26 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1857 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 65,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,100× the energy of this one
  4. This earthquake M 3.5 about 2.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.4× 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 18.1528, -67.6475. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 26 km (16 mi) ENE of here earthquakes near Mayagüez Municipio
Rincón Municipio, PR 47 km (29 mi) WSW of here earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 52 km (32 mi) WNW of here earthquakes near Cabo Rojo Municipio
Aguada Municipio, PR 55 km (34 mi) WSW of here earthquakes near Aguada Municipio
Hormigueros Municipio, PR 56 km (35 mi) W of here earthquakes near Hormigueros Municipio
Añasco Municipio, PR 57 km (35 mi) WSW of here earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 3.6 4 km W of Mayagüez, Puerto Rico
  2. 3.7 52 km SE of Punta Cana, Dominican Republic

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 2017-10-01 — it released about 23 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.