QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

1 km WSW of Los Llanos, Puerto Rico

· 15 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Coamo Municipio 9 kmJuana Díaz Municipio 10 kmVillalba Municipio 11 kmSanta Isabel Municipio 11 kmAibonito Municipio 19 kmOrocovis Municipio 19 kmSalinas Municipio 19 kmBarranquitas Municipio 20 kmPonce Municipio 21 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
15 km below the surface
Felt
no reports yet
Nearest
Coamo Municipio, 9 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2708 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 47 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 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 18.0508, -66.4191. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Coamo Municipio, PR 9 km (5 mi) SW of here earthquakes near Coamo Municipio
Juana Díaz Municipio, PR 10 km (6 mi) NE of here earthquakes near Juana Díaz Municipio
Villalba Municipio, PR 11 km (7 mi) SSE of here earthquakes near Villalba Municipio
Santa Isabel Municipio, PR 11 km (7 mi) NNW of here earthquakes near Santa Isabel Municipio
Aibonito Municipio, PR 19 km (12 mi) WSW of here earthquakes near Aibonito Municipio
Orocovis Municipio, PR 19 km (12 mi) S of here earthquakes near Orocovis 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. 1.5 15 km SSW of Potala Pastillo, Puerto Rico
  2. 1.9 14 km SW of Potala Pastillo, Puerto Rico
  3. 1.8 2 km ESE of Potala Pastillo, Puerto Rico
  4. 2.6 3 km WSW of Ciales, Puerto Rico
  5. 2.4 0 km E of Río Lajas, Puerto Rico
  6. 1.5 3 km NE of Río Cañas Abajo, Puerto Rico
  7. 1.8 6 km ESE of Jayuya, Puerto Rico
  8. 1.9 6 km NW of Villalba, Puerto Rico
  9. 1.6 2 km WSW of Jauca, Puerto Rico
  10. 1.9 4 km SSW of Adjuntas, Puerto Rico
  11. 1.9 9 km ENE of Jayuya, Puerto Rico
  12. 2.5 2 km E of Tierras Nuevas Poniente, Puerto Rico
  13. 2.5 15 km S of Potala Pastillo, Puerto Rico
  14. 1.9 3 km ENE of Magas Arriba, Puerto Rico
  15. 1.5 10 km N of Yauco, 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 2019-03-12 — it released about 5,100 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.