QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

22 km S of Jobos, Puerto Rico

· 21 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 25 kmArroyo Municipio 26 kmSalinas Municipio 28 kmPatillas Municipio 32 kmSanta Isabel Municipio 35 kmMaunabo Municipio 37 kmCayey Municipio 39 kmAibonito Municipio 44 kmYabucoa Municipio 45 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
21 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 25 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3314 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 17.7511, -66.1353. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 25 km (15 mi) S of here earthquakes near Guayama Municipio
Arroyo Municipio, PR 26 km (16 mi) SSW of here earthquakes near Arroyo Municipio
Salinas Municipio, PR 28 km (17 mi) SSE of here earthquakes near Salinas Municipio
Patillas Municipio, PR 32 km (20 mi) SSW of here earthquakes near Patillas Municipio
Santa Isabel Municipio, PR 35 km (22 mi) SE of here earthquakes near Santa Isabel Municipio
Maunabo Municipio, PR 37 km (23 mi) SW of here earthquakes near Maunabo Municipio

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

Aftershocks so far

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

  1. 2.0 9 km SSW of Central Aguirre, Puerto Rico
  2. 2.2 9 km SSE of Jobos, Puerto Rico
  3. 2.2 23 km S of Ponce, Puerto Rico
  4. 2.4 14 km SSE of Central Aguirre, Puerto Rico
  5. 2.7 1 km NE of Jauca, Puerto Rico
  6. 2.7 1 km S of G. L. Garcia, 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. 2.1 3 km SW of Potala Pastillo, 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 18,000 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.