QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Los Llanos, PR

No earthquake was likely felt in Los Llanos in the 24 hours to 2:35 am AST (06:35 UTC). The last one was M 2.2, 7 km (4 mi) ESE, at 5:05 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Los Llanos

This page: a magnitude 1.6 earthquake was recorded in Los Llanos, PR, at 10:48 am AST on 21 February 2019 (14:48 UTC), 7.0 km deep.

USGS: 1 km ESE of Los Llanos, Puerto Rico

53 km (33 mi) SW of San Juan, PR · 25 km (15 mi) ENE of Ponce, PR

10:48 am AST, Feb 21, 2019 · · 7.0 km deep · released about 8.4 lb of TNT

Every earthquake near Los Llanos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Coamo Municipio 7 kmSanta Isabel Municipio 11 kmJuana Díaz Municipio 12 kmVillalba Municipio 12 kmAibonito Municipio 17 kmSalinas Municipio 17 kmBarranquitas Municipio 19 kmOrocovis Municipio 19 kmPonce Municipio 23 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
10:48 am AST on 21 February 2019 ()
Where
in Los Llanos, PR · earthquakes near Los Llanos
Magnitude
M 1.6 (md)
Depth
7.0 km below the surface
Felt
no reports yet
Nearest
Coamo Municipio, 7 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2821 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 9 km (6 mi) from the epicentre. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Coamo 5 km, intensity II · Río Cañas Abajo 8 km, intensity II · Santa Isabel 9 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 8.4 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 1,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.4 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 36 km NE of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 18.0503, -66.3958. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Coamo Municipio, PR 7 km (4 mi) NE earthquakes near Coamo Municipio
Santa Isabel Municipio, PR 11 km (7 mi) S earthquakes near Santa Isabel Municipio
Juana Díaz Municipio, PR 12 km (7 mi) WSW earthquakes near Juana Díaz Municipio
Villalba Municipio, PR 12 km (7 mi) NW earthquakes near Villalba Municipio
Aibonito Municipio, PR 17 km (10 mi) ENE earthquakes near Aibonito Municipio
Salinas Municipio, PR 17 km (10 mi) ESE earthquakes near Salinas Municipio

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

Aftershocks so far

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

  1. 2.3 0 km SW of Jobos, Puerto Rico
  2. 2.1 6 km NW of Santo Domingo, Puerto Rico
  3. 1.6 11 km SSE of Central Aguirre, Puerto Rico
  4. 1.6 Puerto Rico region
  5. 1.6 1 km NNE of Jobos, Puerto Rico
  6. 1.6 0 km ESE of Jobos, Puerto Rico
  7. 2.0 0 km WSW of Jobos, Puerto Rico
  8. 2.2 0 km NNE of Jobos, Puerto Rico
  9. 2.5 0 km NNW of Jobos, Puerto Rico
  10. 1.7 1 km NE of Jobos, Puerto Rico
  11. 2.6 0 km W of Jobos, Puerto Rico
  12. 2.1 0 km NNW of Jobos, Puerto Rico
  13. 2.2 0 km NNE of Jobos, Puerto Rico
  14. 1.7 0 km NE of Jobos, Puerto Rico
  15. 2.6 2 km NNE 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.