QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0md

3 km WNW of Santo Domingo, Puerto Rico

· 6.0 km deep · released about 14 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayanilla Municipio 8 kmPeñuelas Municipio 8 kmYauco Municipio 8 kmAdjuntas Municipio 12 kmSabana Grande Municipio 17 kmMaricao Municipio 20 kmGuánica Municipio 20 kmPonce Municipio 20 kmUtuado Municipio 24 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
6.0 km below the surface
Felt
61 reports · strongest reported intensity V
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Nearest
Guayanilla Municipio, 8 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2290 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 61 people have reported feeling it to USGS.

How big was it?

This earthquake released about 14 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 5.8 540× the energy of this one
  3. Magna, Utah 2020 M 5.7 380× the energy of this one
  4. This earthquake M 4.0 about 14 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 30× 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 18.0723, -66.7846. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 8 km (5 mi) N of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 8 km (5 mi) NW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 8 km (5 mi) E of here earthquakes near Yauco Municipio
Adjuntas Municipio, PR 12 km (8 mi) SSW of here earthquakes near Adjuntas Municipio
Sabana Grande Municipio, PR 17 km (11 mi) E of here earthquakes near Sabana Grande Municipio
Maricao Municipio, PR 20 km (12 mi) SE of here earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 3.1 0 km S of Palomas, Puerto Rico
  2. 2.6 3 km SSW of Indios, Puerto Rico
  3. 2.6 6 km SW of Guánica, Puerto Rico
  4. 3.0 3 km SW of Indios, Puerto Rico
  5. 2.8 6 km SE of Maria Antonia, Puerto Rico
  6. 2.5 3 km SSW of Indios, Puerto Rico
  7. 2.7 13 km S of Guánica, Puerto Rico
  8. 2.4 4 km S of Indios, Puerto Rico
  9. 2.2 2 km WNW of Guayanilla, Puerto Rico
  10. 2.2 16 km SSE of Guánica, Puerto Rico
  11. 2.7 15 km SSE of Maria Antonia, Puerto Rico
  12. 2.3 12 km SSE of Guánica, Puerto Rico
  13. 3.0 3 km SE of Maria Antonia, Puerto Rico
  14. 2.7 4 km S of Guánica, Puerto Rico
  15. 2.3 4 km SW of Tallaboa, 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 6.4 on 2020-01-07 — it released about 4,300 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.