QuakeIndex

Earthquake · reviewed by a seismologist

M 3.7ml

10 km SSW of Guánica, Puerto Rico

· 13 km deep · released about 5.4 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 8 kmLajas Municipio 14 kmGuayanilla Municipio 21 kmSabana Grande Municipio 22 kmYauco Municipio 24 kmSan Germán Municipio 27 kmCabo Rojo Municipio 28 kmPeñuelas Municipio 28 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 3.7 (ml)
Depth
13 km below the surface
Felt
2 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
Nearest
Guánica Municipio, 8 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2017 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 5.4 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 32,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,000× the energy of this one
  4. This earthquake M 3.7 about 5.4 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 11× 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 17.8843, -66.9487. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 8 km (5 mi) SSW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 14 km (9 mi) SE of here earthquakes near Lajas Municipio
Guayanilla Municipio, PR 21 km (13 mi) SW of here earthquakes near Guayanilla Municipio
Sabana Grande Municipio, PR 22 km (14 mi) S of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 24 km (15 mi) SSW of here earthquakes near Yauco Municipio
San Germán Municipio, PR 27 km (17 mi) SSE of here earthquakes near San Germán 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 WSW of Guánica, Puerto Rico
  2. 1.6 5 km SE of La Parguera, Puerto Rico
  3. 2.1 5 km E of La Parguera, Puerto Rico
  4. 1.5 3 km SSW of La Parguera, Puerto Rico
  5. 1.5 4 km WSW of Fuig, Puerto Rico
  6. 1.8 6 km WSW of Fuig, Puerto Rico
  7. 1.9 0 km N of Indios, Puerto Rico
  8. 1.6 4 km WSW of Guánica, Puerto Rico
  9. 1.6 6 km SW of Liborio Negron Torres, Puerto Rico
  10. 2.1 2 km WNW of Tallaboa, Puerto Rico
  11. 1.7 1 km SSE of Guánica, Puerto Rico
  12. 2.1 6 km SE of Maria Antonia, Puerto Rico
  13. 2.1 4 km SE of La Parguera, Puerto Rico
  14. 1.7 3 km WNW of Santo Domingo, Puerto Rico
  15. 1.8 8 km SE of La Parguera, 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 11,000 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.