QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

33 km S of Jobos, Puerto Rico

· 14 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 35 kmArroyo Municipio 36 kmSalinas Municipio 39 kmPatillas Municipio 40 kmMaunabo Municipio 44 kmSanta Isabel Municipio 44 kmCayey Municipio 50 kmYabucoa Municipio 52 kmAibonito Municipio 55 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
14 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 35 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3323 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 17 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 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 17.6578, -66.1051. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 35 km (22 mi) S of here earthquakes near Guayama Municipio
Arroyo Municipio, PR 36 km (22 mi) S of here earthquakes near Arroyo Municipio
Salinas Municipio, PR 39 km (24 mi) SSE of here earthquakes near Salinas Municipio
Patillas Municipio, PR 40 km (25 mi) SSW of here earthquakes near Patillas Municipio
Maunabo Municipio, PR 44 km (27 mi) SSW of here earthquakes near Maunabo Municipio
Santa Isabel Municipio, PR 44 km (28 mi) SE of here earthquakes near Santa Isabel Municipio

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

Aftershocks so far

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

  1. 3.2 13 km S of Potala Pastillo, Puerto Rico
  2. 2.5 44 km S of Santa Isabel, Puerto Rico
  3. 2.0 9 km SSW of Central Aguirre, Puerto Rico
  4. 2.2 9 km SSE of Jobos, Puerto Rico
  5. 2.4 14 km SSE of Central Aguirre, Puerto Rico
  6. 2.7 1 km NE of Jauca, Puerto Rico
  7. 2.7 10 km S of Jobos, Puerto Rico
  8. 1.5 3 km SSW of Arroyo, Puerto Rico
  9. 2.4 5 km N of Yaurel, Puerto Rico
  10. 3.0 4 km SE of G. L. Garcia, Puerto Rico
  11. 1.5 10 km S of Jobos, Puerto Rico
  12. 3.1 4 km SSE of Palo Seco, Puerto Rico
  13. 2.8 18 km SSE of Arroyo, Puerto Rico
  14. 1.6 20 km S of Arroyo, Puerto Rico
  15. 3.0 4 km SSE of Cayey, 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 14,000 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.