QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

4 km N of Jobos, Puerto Rico

· 14 km deep · released about 23 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 3 kmSalinas Municipio 11 kmCayey Municipio 12 kmArroyo Municipio 13 kmPatillas Municipio 18 kmAibonito Municipio 19 kmCidra Municipio 20 kmCoamo Municipio 24 kmSanta Isabel Municipio 25 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
14 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 3 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2733 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 23 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 5.8 660,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 470,000× the energy of this one
  3. Around the size people start to feel M 3.0 42× the energy of this one
  4. This earthquake M 1.9 about 23 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 17.9946, -66.1580. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 3 km (2 mi) NW of here earthquakes near Guayama Municipio
Salinas Municipio, PR 11 km (7 mi) ENE of here earthquakes near Salinas Municipio
Cayey Municipio, PR 12 km (8 mi) S of here earthquakes near Cayey Municipio
Arroyo Municipio, PR 13 km (8 mi) WNW of here earthquakes near Arroyo Municipio
Patillas Municipio, PR 18 km (11 mi) W of here earthquakes near Patillas Municipio
Aibonito Municipio, PR 19 km (12 mi) SE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.4 0 km E of Río Lajas, Puerto Rico
  2. 1.5 3 km NE of Río Cañas Abajo, Puerto Rico
  3. 1.8 6 km ESE of Jayuya, Puerto Rico
  4. 1.9 6 km NW of Villalba, Puerto Rico
  5. 1.6 2 km WSW of Jauca, Puerto Rico
  6. 1.9 9 km ENE of Jayuya, Puerto Rico
  7. 2.3 5 km ESE of Emajagua, Puerto Rico
  8. 2.8 12 km SSE of Punta Santiago, Puerto Rico
  9. 2.5 15 km S of Potala Pastillo, Puerto Rico
  10. 2.7 1 km E of Guaynabo, Puerto Rico
  11. 1.9 5 km SSE of Arroyo, Puerto Rico
  12. 1.5 1 km S of Jauca, Puerto Rico
  13. 1.5 2 km NNE of San Lorenzo, Puerto Rico
  14. 1.7 3 km NNE of Río Cañas Abajo, Puerto Rico
  15. 2.6 6 km ESE of Pájaros, 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 10,000 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.