QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11 km SSE of La Parguera, Puerto Rico

· 14 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Guánica Municipio 12 kmLajas Municipio 12 kmCabo Rojo Municipio 23 kmSabana Grande Municipio 24 kmSan Germán Municipio 26 kmGuayanilla Municipio 26 kmYauco Municipio 28 kmHormigueros Municipio 31 kmPeñuelas Municipio 34 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, 12 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2554 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 17.8773, -67.0038. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guánica Municipio, PR 12 km (7 mi) SW of here earthquakes near Guánica Municipio
Lajas Municipio, PR 12 km (7 mi) SSE of here earthquakes near Lajas Municipio
Cabo Rojo Municipio, PR 23 km (14 mi) SE of here earthquakes near Cabo Rojo Municipio
Sabana Grande Municipio, PR 24 km (15 mi) SSW of here earthquakes near Sabana Grande Municipio
San Germán Municipio, PR 26 km (16 mi) S of here earthquakes near San Germán Municipio
Guayanilla Municipio, PR 26 km (16 mi) WSW of here earthquakes near Guayanilla 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. 1.6 11 km ESE of Maricao, Puerto Rico
  2. 1.9 15 km SSW of Potala Pastillo, Puerto Rico
  3. 2.0 8 km S of La Parguera, Puerto Rico
  4. 2.2 12 km SSE of Ponce, Puerto Rico
  5. 2.1 12 km SSW of Potala Pastillo, Puerto Rico
  6. 2.0 15 km S of Tallaboa, Puerto Rico
  7. 2.1 12 km SSE of Ponce, Puerto Rico
  8. 2.2 12 km SSE of Ponce, Puerto Rico
  9. 1.6 0 km NW of Cabo Rojo, Puerto Rico
  10. 1.7 3 km WNW of Pole Ojea, Puerto Rico
  11. 1.8 12 km SSE of Ponce, Puerto Rico
  12. 1.7 1 km S of Liborio Negron Torres, Puerto Rico
  13. 1.9 4 km WNW of Fuig, Puerto Rico
  14. 2.0 10 km W of Adjuntas, Puerto Rico
  15. 1.9 11 km SSE 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 4.3 on 2019-09-05 — it released about 6,000 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.