QuakeIndex

Earthquake · reviewed by a seismologist

M 4.0ml

9 km SE of Maria Antonia, Puerto Rico

· 8.0 km deep · released about 15 tons of TNT

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10 km30 km60 km120 km N Guánica Municipio 10 kmGuayanilla Municipio 12 kmPeñuelas Municipio 18 kmYauco Municipio 20 kmLajas Municipio 23 kmSabana Grande Municipio 23 kmPonce Municipio 27 kmSan Germán Municipio 31 kmMaricao Municipio 32 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 (ml)
Depth
8.0 km below the surface
Felt
47 reports · strongest reported intensity IV
Nearest
Guánica Municipio, 10 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2369 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 47 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 11,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 500× the energy of this one
  3. Magna, Utah 2020 M 5.7 350× 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 32× 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 17.9058, -66.8371. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 10 km (6 mi) ESE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 12 km (7 mi) SSW of here earthquakes near Guayanilla Municipio
Peñuelas Municipio, PR 18 km (11 mi) SW of here earthquakes near Peñuelas Municipio
Yauco Municipio, PR 20 km (13 mi) S of here earthquakes near Yauco Municipio
Lajas Municipio, PR 23 km (14 mi) ESE of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 23 km (14 mi) SSE of here earthquakes near Sabana Grande 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. 1.7 2 km E of Palomas, Puerto Rico
  2. 2.8 20 km SSE of Guánica, Puerto Rico
  3. 2.7 19 km SSE of Guánica, Puerto Rico
  4. 2.5 15 km SSE of Guánica, Puerto Rico
  5. 2.6 11 km SSE of Guánica, Puerto Rico
  6. 2.2 3 km SE of Maria Antonia, Puerto Rico
  7. 2.7 15 km SSE of Guánica, Puerto Rico
  8. 2.5 4 km ESE of Maria Antonia, Puerto Rico
  9. 2.6 17 km SSE of Guánica, Puerto Rico
  10. 3.0 19 km SSE of Guánica, Puerto Rico
  11. 3.4 12 km SSE of Guánica, Puerto Rico
  12. 3.2 21 km SSE of Guánica, Puerto Rico
  13. 4.6 13 km SSE of Guánica, Puerto Rico
  14. 1.8 4 km WSW of Guánica, Puerto Rico
  15. 2.9 0 km SSE of Guánica, 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 4,000 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.