QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

5 km W of Rosa Sanchez, Puerto Rico

· 9.3 km deep · released about 14 lb of TNT

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10 km30 km60 km120 km N Patillas Municipio 8 kmSan Lorenzo Municipio 9 kmMaunabo Municipio 10 kmYabucoa Municipio 11 kmArroyo Municipio 14 kmLas Piedras Municipio 16 kmJuncos Municipio 18 kmCaguas Municipio 19 kmHumacao Municipio 20 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
9.3 km below the surface
Felt
no reports yet
Nearest
Patillas Municipio, 8 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 415 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 18.0667, -65.9607. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Patillas Municipio, PR 8 km (5 mi) NNE of here earthquakes near Patillas Municipio
San Lorenzo Municipio, PR 9 km (6 mi) S of here earthquakes near San Lorenzo Municipio
Maunabo Municipio, PR 10 km (6 mi) NW of here earthquakes near Maunabo Municipio
Yabucoa Municipio, PR 11 km (7 mi) W of here earthquakes near Yabucoa Municipio
Arroyo Municipio, PR 14 km (8 mi) NE of here earthquakes near Arroyo Municipio
Las Piedras Municipio, PR 16 km (10 mi) SW of here earthquakes near Las Piedras Municipio

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

Aftershocks so far

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

  1. 3.3 5 km NNE of Aguas Buenas, Puerto Rico
  2. 1.9 3 km E of G. L. Garcia, Puerto Rico
  3. 2.0 9 km S of Emajagua, Puerto Rico
  4. 2.7 4 km ESE of Jagual, Puerto Rico
  5. 2.5 2 km SSW of Cayey, Puerto Rico
  6. 2.9 6 km NNW of Loíza, Puerto Rico
  7. 2.6 5 km NNW of Coamo, Puerto Rico
  8. 1.8 2 km NNW of La Plena, Puerto Rico
  9. 2.8 4 km SSE of Cayey, Puerto Rico
  10. 2.3 6 km ENE of Naranjito, Puerto Rico
  11. 1.8 1 km WSW of G. L. Garcia, Puerto Rico
  12. 3.2 9 km WSW of Esperanza, Puerto Rico
  13. 2.7 1 km E of Palmas, Puerto Rico
  14. 3.2 2 km SW of G. L. Garcia, Puerto Rico
  15. 2.9 4 km NW of Coamo, 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 4.6 on 2016-12-05 — it released about 17,000 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.