QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Pastos, PR

No earthquake was likely felt in Pastos in the 24 hours to 2:03 pm AST (18:03 UTC). The last one was M 3.3, 32 km (20 mi) SSW, at 8:40 am AST on 1 November 2026, estimated intensity II (weak) in town. Every earthquake near Pastos

This page: a magnitude 2.3 earthquake was recorded in Pastos, PR, at 12:03 am AST on 20 June 2017 (04:03 UTC), 17 km deep.

USGS: 0 km N of Pastos, Puerto Rico

37 km (23 mi) SSW of San Juan, PR · 26 km (16 mi) WSW of Caguas, PR

12:03 am AST, Jun 20, 2017 · · 17 km deep · released about 91 lb of TNT

Every earthquake near Pastos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aibonito Municipio 1 kmBarranquitas Municipio 10 kmCoamo Municipio 11 kmCayey Municipio 12 kmCidra Municipio 12 kmComerío Municipio 12 kmSalinas Municipio 17 kmNaranjito Municipio 19 kmAguas Buenas Municipio 20 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
12:03 am AST on 20 June 2017 ()
Where
in Pastos, PR · earthquakes near Pastos
Magnitude
M 2.3 (md)
Depth
17 km below the surface
Felt
no reports yet
Nearest
Aibonito Municipio, 1 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3429 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 10 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: Cayey 10 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 120,000× the energy of this one
  3. Around the size people start to feel M 3.0 10× the energy of this one
  4. This earthquake M 2.3 about 91 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

The largest earthquake within 50 km since 2016 was M 4.6 on 2016-12-05 — about 2,600 times the energy of this one.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 3 km W of Aguas Buenas, Puerto Rico · 20 km NE of this epicentre
  2. 5.0 3 km N of Brenas, Puerto Rico · 43 km NNW 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 18.1233, -66.2590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aibonito Municipio, PR 1 km (1 mi) NW earthquakes near Aibonito Municipio
Barranquitas Municipio, PR 10 km (6 mi) NNW earthquakes near Barranquitas Municipio
Coamo Municipio, PR 11 km (7 mi) WSW earthquakes near Coamo Municipio
Cayey Municipio, PR 12 km (7 mi) E earthquakes near Cayey Municipio
Cidra Municipio, PR 12 km (7 mi) ENE earthquakes near Cidra Municipio
Comerío Municipio, PR 12 km (7 mi) NNE earthquakes near Comerío 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. 2.9 21 km S of Lamboglia, Puerto Rico
  2. 1.8 22 km S of Jobos, Puerto Rico
  3. 2.5 23 km SSE of Arroyo, Puerto Rico
  4. 2.4 20 km SSE of Jobos, Puerto Rico
  5. 2.4 3 km S of Salinas, Puerto Rico
  6. 2.2 4 km W of Central Aguirre, Puerto Rico
  7. 2.7 6 km SSW of Corozal, Puerto Rico
  8. 3.1 5 km NE of Orocovis, Puerto Rico
  9. 2.4 2 km W of Aibonito, Puerto Rico
  10. 3.0 6 km NW of Palomas, Puerto Rico
  11. 2.9 2 km NNE of Franquez, Puerto Rico
  12. 2.7 7 km NW of Sumidero, Puerto Rico
  13. 2.4 4 km SE of Salinas, Puerto Rico
  14. 3.0 4 km SE of Salinas, Puerto Rico
  15. 2.4 3 km S of Coco, 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.