QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

6 km WSW of Guánica, Puerto Rico

· 12 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 4 kmLajas Municipio 10 kmSabana Grande Municipio 16 kmGuayanilla Municipio 18 kmYauco Municipio 19 kmSan Germán Municipio 20 kmCabo Rojo Municipio 24 kmMaricao Municipio 26 kmPeñuelas Municipio 26 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 1.8 (md)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 4 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1937 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 lb of TNT

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 17.9401, -66.9588. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 4 km (2 mi) WSW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 10 km (6 mi) ESE of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 16 km (10 mi) S of here earthquakes near Sabana Grande Municipio
Guayanilla Municipio, PR 18 km (11 mi) WSW of here earthquakes near Guayanilla Municipio
Yauco Municipio, PR 19 km (12 mi) SSW of here earthquakes near Yauco Municipio
San Germán Municipio, PR 20 km (13 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 3 km E of Maria Antonia, Puerto Rico
  2. 2.1 8 km WSW of La Parguera, Puerto Rico
  3. 1.9 6 km SE of Pole Ojea, Puerto Rico
  4. 1.8 0 km NNE of Palomas, Puerto Rico
  5. 1.9 7 km WSW of Fuig, Puerto Rico
  6. 1.9 8 km S of Indios, Puerto Rico
  7. 1.7 7 km SSE of Maria Antonia, Puerto Rico
  8. 2.0 6 km WSW of Fuig, Puerto Rico
  9. 1.7 7 km ESE of La Parguera, Puerto Rico
  10. 1.6 3 km SSE of Maria Antonia, Puerto Rico
  11. 2.1 7 km ESE of La Parguera, Puerto Rico
  12. 2.0 4 km SW of Indios, Puerto Rico
  13. 1.6 1 km ENE of Maria Antonia, Puerto Rico
  14. 1.6 4 km SE of La Parguera, Puerto Rico
  15. 2.0 0 km E of Fuig, 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 8,500,000 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.