QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0md

35 km SW of Stella, Puerto Rico

· 151 km deep · released about 15 tons of TNT

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10 km30 km60 km120 km N Rincón Municipio 37 kmMayagüez Municipio 39 kmCabo Rojo Municipio 40 kmHormigueros Municipio 43 kmAguada Municipio 45 kmAñasco Municipio 45 kmSan Germán Municipio 52 kmMoca Municipio 54 kmLajas Municipio 54 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 4.0 (md)
Depth
151 km below the surface
Felt
3 reports · strongest reported intensity IV
Nearest
Rincón Municipio, 37 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 837 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 15 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 12,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 520× the energy of this one
  3. Magna, Utah 2020 M 5.7 370× the energy of this one
  4. This earthquake M 4.0 about 15 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 31× 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 18.1368, -67.5251. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Rincón Municipio, PR 37 km (23 mi) SW of here earthquakes near Rincón Municipio
Mayagüez Municipio, PR 39 km (24 mi) E of here earthquakes near Mayagüez Municipio
Cabo Rojo Municipio, PR 40 km (25 mi) WNW of here earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 43 km (27 mi) W of here earthquakes near Hormigueros Municipio
Aguada Municipio, PR 45 km (28 mi) SW of here earthquakes near Aguada Municipio
Añasco Municipio, PR 45 km (28 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

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

  1. 3.0 10 km WSW of Stella, Puerto Rico
  2. 3.3 1 km WNW of Aguada, Puerto Rico
  3. 3.0 14 km WNW of Rincón, Puerto Rico
  4. 2.6 23 km SW of Stella, Puerto Rico
  5. 2.6 8 km NW of Rincón, Puerto Rico
  6. 3.0 36 km WNW of Rincón, Puerto Rico
  7. 2.5 16 km WNW of Rincón, Puerto Rico
  8. 3.4 64 km SE of Punta Cana, Dominican Republic
  9. 3.2 7 km SSW of La Playa, Puerto Rico
  10. 2.9 13 km WSW of Mayagüez, Puerto Rico
  11. 3.8 49 km W of Rincón, Puerto Rico
  12. 3.1 60 km WSW of Stella, Puerto Rico
  13. 3.3 58 km SE of Punta Cana, Dominican Republic
  14. 2.6 4 km SW of Mayagüez, Puerto Rico
  15. 2.4 6 km SSE of Pole Ojea, 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 2017-10-01 — it released about 4.1 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.