QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

2 km N of Playita Cortada, Puerto Rico

· 8.0 km deep · released about 13 lb of TNT

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10 km30 km60 km120 km N Juana Díaz Municipio 5 kmSanta Isabel Municipio 8 kmCoamo Municipio 14 kmVillalba Municipio 15 kmPonce Municipio 18 kmSalinas Municipio 19 kmAibonito Municipio 23 kmOrocovis Municipio 24 kmBarranquitas 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
8.0 km below the surface
Felt
no reports yet
Nearest
Juana Díaz Municipio, 5 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2739 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 13 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 18.0035, -66.4406. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Juana Díaz Municipio, PR 5 km (3 mi) E of here earthquakes near Juana Díaz Municipio
Santa Isabel Municipio, PR 8 km (5 mi) NW of here earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 14 km (9 mi) SW of here earthquakes near Coamo Municipio
Villalba Municipio, PR 15 km (9 mi) SSE of here earthquakes near Villalba Municipio
Ponce Municipio, PR 18 km (11 mi) E of here earthquakes near Ponce Municipio
Salinas Municipio, PR 19 km (12 mi) W of here earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 1.8 2 km N of Lluveras, Puerto Rico
  2. 1.7 3 km N of Lluveras, Puerto Rico
  3. 1.7 5 km NW of Adjuntas, Puerto Rico
  4. 2.1 1 km WSW of Los Llanos, Puerto Rico
  5. 2.5 2 km ENE of Pájaros, Puerto Rico
  6. 1.5 4 km SSE of Adjuntas, Puerto Rico
  7. 1.5 5 km NW of Coamo, Puerto Rico
  8. 1.8 0 km SSE of Jobos, Puerto Rico
  9. 1.9 2 km S of Barahona, Puerto Rico
  10. 2.0 18 km S of Indios, Puerto Rico
  11. 1.9 4 km W of Cayuco, Puerto Rico
  12. 1.7 18 km SSW of Tallaboa, Puerto Rico
  13. 1.9 11 km E of Maricao, Puerto Rico
  14. 1.6 3 km SSE of Adjuntas, Puerto Rico
  15. 1.6 3 km WNW of Santo Domingo, 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 2019-03-12 — it released about 19,000 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.