QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

11 km SSE of Jobos, Puerto Rico

· 35 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Guayama Municipio 13 kmArroyo Municipio 15 kmSalinas Municipio 19 kmPatillas Municipio 22 kmCayey Municipio 28 kmMaunabo Municipio 29 kmSanta Isabel Municipio 30 kmAibonito Municipio 34 kmCidra Municipio 36 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 2.1 (md)
Depth
35 km below the surface
Felt
no reports yet
Nearest
Guayama Municipio, 13 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3419 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 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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, -66.1233. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Guayama Municipio, PR 13 km (8 mi) S of here earthquakes near Guayama Municipio
Arroyo Municipio, PR 15 km (10 mi) SW of here earthquakes near Arroyo Municipio
Salinas Municipio, PR 19 km (12 mi) SE of here earthquakes near Salinas Municipio
Patillas Municipio, PR 22 km (13 mi) SW of here earthquakes near Patillas Municipio
Cayey Municipio, PR 28 km (17 mi) S of here earthquakes near Cayey Municipio
Maunabo Municipio, PR 29 km (18 mi) WSW of here earthquakes near Maunabo Municipio

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

Aftershocks so far

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

  1. 2.3 21 km ESE of El Negro, Puerto Rico
  2. 2.6 13 km S of Santa Isabel, Puerto Rico
  3. 1.9 15 km ESE of Emajagua, Puerto Rico
  4. 2.4 11 km S of Emajagua, Puerto Rico
  5. 2.2 9 km S of Emajagua, Puerto Rico
  6. 2.9 7 km NNW of Martorell, Puerto Rico
  7. 1.6 6 km WNW of Palomas, Puerto Rico
  8. 1.9 2 km NW of Aibonito, Puerto Rico
  9. 2.5 3 km E of La Plena, Puerto Rico
  10. 2.2 6 km SSE of Emajagua, Puerto Rico
  11. 2.8 13 km S of Salinas, Puerto Rico
  12. 2.0 0 km SE of Comunas, Puerto Rico
  13. 2.7 9 km S of Emajagua, Puerto Rico
  14. 2.3 0 km N of Pastos, Puerto Rico
  15. 2.5 3 km ESE of Jauca, 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 4,700 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.