QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2ml

1 km WNW of Indios, Puerto Rico

· 11 km deep · released about 27 tons of TNT

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10 km30 km60 km120 km N Guayanilla Municipio 4 kmYauco Municipio 10 kmGuánica Municipio 11 kmPeñuelas Municipio 11 kmSabana Grande Municipio 15 kmAdjuntas Municipio 22 kmLajas Municipio 22 kmMaricao Municipio 22 kmPonce 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 4.2 (ml)
Depth
11 km below the surface
Felt
128 reports · strongest reported intensity VI
Nearest
Guayanilla Municipio, 4 km E
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. 128 people have reported feeling it to USGS.

How big was it?

This earthquake released about 27 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 6,200× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 280× the energy of this one
  3. Magna, Utah 2020 M 5.7 200× the energy of this one
  4. This earthquake M 4.2 about 27 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 57× 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 17.9996, -66.8316. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayanilla Municipio, PR 4 km (2 mi) W of here earthquakes near Guayanilla Municipio
Yauco Municipio, PR 10 km (6 mi) SSE of here earthquakes near Yauco Municipio
Guánica Municipio, PR 11 km (7 mi) ENE of here earthquakes near Guánica Municipio
Peñuelas Municipio, PR 11 km (7 mi) WSW of here earthquakes near Peñuelas Municipio
Sabana Grande Municipio, PR 15 km (10 mi) SE of here earthquakes near Sabana Grande Municipio
Adjuntas Municipio, PR 22 km (13 mi) SSW of here earthquakes near Adjuntas 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. 3.0 9 km S of Indios, Puerto Rico
  2. 2.4 18 km SSE of Guánica, Puerto Rico
  3. 2.4 8 km SE of Maria Antonia, Puerto Rico
  4. 3.0 7 km SE of Maria Antonia, Puerto Rico
  5. 2.8 3 km SSW of Guánica, Puerto Rico
  6. 2.7 9 km S of Indios, Puerto Rico
  7. 2.3 2 km SSE of Yauco, Puerto Rico
  8. 2.7 4 km SSE of Magas Arriba, Puerto Rico
  9. 2.8 5 km SSE of Indios, Puerto Rico
  10. 2.3 7 km SSE of Guánica, Puerto Rico
  11. 2.6 5 km SSE of Maria Antonia, Puerto Rico
  12. 2.8 1 km SSW of Magas Arriba, Puerto Rico
  13. 2.8 2 km WSW of Fuig, Puerto Rico
  14. 2.8 1 km SE of Indios, Puerto Rico
  15. 3.5 5 km S of Indios, 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 2,200 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.