QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

11 km SSE of Central Aguirre, Puerto Rico

· 10 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 15 kmSalinas Municipio 15 kmArroyo Municipio 21 kmSanta Isabel Municipio 23 kmPatillas Municipio 27 kmCayey Municipio 28 kmAibonito Municipio 31 kmCoamo Municipio 32 kmJuana Díaz Municipio 35 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 1.6 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 15 km NNE
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 6.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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 17.8563, -66.1971. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 15 km (9 mi) SSW of here earthquakes near Guayama Municipio
Salinas Municipio, PR 15 km (9 mi) SSE of here earthquakes near Salinas Municipio
Arroyo Municipio, PR 21 km (13 mi) SW of here earthquakes near Arroyo Municipio
Santa Isabel Municipio, PR 23 km (14 mi) ESE of here earthquakes near Santa Isabel Municipio
Patillas Municipio, PR 27 km (17 mi) SW of here earthquakes near Patillas Municipio
Cayey Municipio, PR 28 km (17 mi) S of here earthquakes near Cayey Municipio

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

Aftershocks so far

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

  1. 1.9 4 km N of Jobos, Puerto Rico
  2. 2.4 33 km SSE of Arroyo, Puerto Rico
  3. 1.7 7 km SSE of Palo Seco, Puerto Rico
  4. 1.9 18 km SSW of Santa Isabel, Puerto Rico
  5. 1.7 2 km S of Capitanejo, Puerto Rico
  6. 1.8 2 km N of Playita Cortada, Puerto Rico
  7. 1.6 0 km N of Jobos, Puerto Rico
  8. 1.7 2 km SSW of G. L. Garcia, Puerto Rico
  9. 2.4 3 km SE of Cayey, Puerto Rico
  10. 1.9 Puerto Rico region
  11. 1.9 0 km ENE of Jobos, Puerto Rico
  12. 2.2 4 km SSE of Cayey, Puerto Rico
  13. 1.6 3 km SE of Cayey, Puerto Rico
  14. 2.2 5 km SSW of Arroyo, Puerto Rico
  15. 2.0 2 km NE 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 35,000 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.