QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

0 km NE of Jobos, Puerto Rico

· 15 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 3 kmSalinas Municipio 11 kmArroyo Municipio 13 kmCayey Municipio 16 kmPatillas Municipio 19 kmAibonito Municipio 22 kmSanta Isabel Municipio 24 kmCidra Municipio 24 kmCoamo 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
15 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 3 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2756 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 16 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 5.8 930,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 660,000× the energy of this one
  3. Around the size people start to feel M 3.0 59× the energy of this one
  4. This earthquake M 1.8 about 16 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 17.9588, -66.1613. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 3 km (2 mi) WSW of here earthquakes near Guayama Municipio
Salinas Municipio, PR 11 km (7 mi) E of here earthquakes near Salinas Municipio
Arroyo Municipio, PR 13 km (8 mi) W of here earthquakes near Arroyo Municipio
Cayey Municipio, PR 16 km (10 mi) S of here earthquakes near Cayey Municipio
Patillas Municipio, PR 19 km (12 mi) WSW of here earthquakes near Patillas Municipio
Aibonito Municipio, PR 22 km (14 mi) SSE of here earthquakes near Aibonito Municipio

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

Aftershocks so far

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

  1. 2.4 3 km SE of Cayey, Puerto Rico
  2. 1.9 Puerto Rico region
  3. 1.9 0 km ENE of Jobos, Puerto Rico
  4. 2.2 4 km SSE of Cayey, Puerto Rico
  5. 1.6 3 km SE of Cayey, Puerto Rico
  6. 2.2 5 km SSW of Arroyo, Puerto Rico
  7. 2.0 2 km NE of Jobos, Puerto Rico
  8. 2.3 21 km SSE of Arroyo, Puerto Rico
  9. 1.7 4 km ENE of Bayamon, Puerto Rico
  10. 1.9 0 km SSE of Jobos, Puerto Rico
  11. 1.5 1 km E of Jobos, Puerto Rico
  12. 2.2 7 km WNW of Palomas, Puerto Rico
  13. 1.8 3 km ENE of Jobos, Puerto Rico
  14. 1.9 0 km NNE of Jobos, Puerto Rico
  15. 1.8 1 km ESE of Jobos, 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 15,000 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.