QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

Puerto Rico region

· 14 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guánica Municipio 2 kmGuayanilla Municipio 14 kmLajas Municipio 15 kmSabana Grande Municipio 17 kmYauco Municipio 17 kmPeñuelas Municipio 21 kmSan Germán Municipio 23 kmMaricao Municipio 26 kmCabo Rojo Municipio 30 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
14 km below the surface
Felt
no reports yet
Nearest
Guánica Municipio, 2 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1064 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 17 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× the energy of this one
  4. This earthquake M 1.8 about 17 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 17.9375, -66.9065. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 2 km (1 mi) SE of here earthquakes near Guánica Municipio
Guayanilla Municipio, PR 14 km (9 mi) WSW of here earthquakes near Guayanilla Municipio
Lajas Municipio, PR 15 km (9 mi) ESE of here earthquakes near Lajas Municipio
Sabana Grande Municipio, PR 17 km (11 mi) SSE of here earthquakes near Sabana Grande Municipio
Yauco Municipio, PR 17 km (11 mi) SSW of here earthquakes near Yauco Municipio
Peñuelas Municipio, PR 21 km (13 mi) WSW of here earthquakes near Peñuelas Municipio

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

Aftershocks so far

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

  1. 2.1 7 km NW of Coto Laurel, Puerto Rico
  2. 2.3 1 km ENE of Indios, Puerto Rico
  3. 3.1 4 km WSW of Mayagüez, Puerto Rico
  4. 3.4 6 km ENE of La Parguera, Puerto Rico
  5. 2.2 Puerto Rico region
  6. 2.1 5 km ENE of Tallaboa, Puerto Rico
  7. 2.4 3 km W of Cayuco, Puerto Rico
  8. 2.0 Puerto Rico region
  9. 2.4 14 km SSE of Guánica, Puerto Rico
  10. 2.6 4 km ESE of Adjuntas, Puerto Rico
  11. 2.5 3 km WSW of Fuig, Puerto Rico
  12. 2.6 0 km E of Indios, Puerto Rico
  13. 2.5 5 km SSE of Maria Antonia, Puerto Rico
  14. 2.6 Puerto Rico region
  15. 2.4 0 km N 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 7,200,000 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.