QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

3 km SSW of Las Ochenta, Puerto Rico

· 8.0 km deep · released about 19 lb of TNT

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10 km30 km60 km120 km N Santa Isabel Municipio 6 kmSalinas Municipio 7 kmCoamo Municipio 17 kmJuana Díaz Municipio 18 kmGuayama Municipio 20 kmAibonito Municipio 21 kmVillalba Municipio 25 kmCayey Municipio 25 kmBarranquitas Municipio 27 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 1.9 (md)
Depth
8.0 km below the surface
Felt
3 reports · strongest reported intensity IV
Nearest
Santa Isabel Municipio, 6 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2529 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 17.9566, -66.3285. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Isabel Municipio, PR 6 km (4 mi) E of here earthquakes near Santa Isabel Municipio
Salinas Municipio, PR 7 km (4 mi) WSW of here earthquakes near Salinas Municipio
Coamo Municipio, PR 17 km (10 mi) S of here earthquakes near Coamo Municipio
Juana Díaz Municipio, PR 18 km (11 mi) ESE of here earthquakes near Juana Díaz Municipio
Guayama Municipio, PR 20 km (13 mi) W of here earthquakes near Guayama Municipio
Aibonito Municipio, PR 21 km (13 mi) SSW of here earthquakes near Aibonito 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. 2.3 2 km SSW of Las Ochenta, Puerto Rico
  2. 2.0 12 km SSE of Arroyo, Puerto Rico
  3. 2.0 1 km WNW of Las Ochenta, Puerto Rico
  4. 1.5 1 km E of Jauca, Puerto Rico
  5. 2.0 2 km SE of Palmarejo, Puerto Rico
  6. 2.5 8 km S of Salinas, Puerto Rico
  7. 1.9 11 km SSE of Ponce, Puerto Rico
  8. 1.5 3 km S of Las Ochenta, Puerto Rico
  9. 2.3 13 km SSE of Ponce, Puerto Rico
  10. 2.1 1 km SSW of Río Cañas Abajo, Puerto Rico
  11. 1.8 4 km SE of Jauca, Puerto Rico
  12. 1.7 1 km NE of Tallaboa, Puerto Rico
  13. 2.0 4 km SSW of Salinas, Puerto Rico
  14. 2.8 2 km SSW of Las Ochenta, Puerto Rico
  15. 2.6 Puerto Rico region

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 13,000 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.