QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7Md

Earthquake near Las Ochenta, PR

No earthquake was likely felt in Las Ochenta in the 24 hours to 10:50 am AST (14:50 UTC). The last one was M 2.2, 6 km (4 mi) NW, at 5:05 pm AST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Las Ochenta

This page: a magnitude 2.7 earthquake was recorded in Las Ochenta, PR, at 7:48 pm AST on 21 March 2017 (23:48 UTC), 8.0 km deep.

USGS: 1 km S of Las Ochenta, Puerto Rico

55 km (34 mi) SSW of San Juan, PR · 32 km (20 mi) E of Ponce, PR

7:48 pm AST, Mar 21, 2017 · · 8.0 km deep · released about 340 lb of TNT

Every earthquake near Las Ochenta Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Salinas Municipio 6 kmSanta Isabel Municipio 8 kmCoamo Municipio 15 kmJuana Díaz Municipio 18 kmAibonito Municipio 19 kmGuayama Municipio 19 kmCayey Municipio 23 kmVillalba Municipio 24 kmBarranquitas Municipio 26 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
7:48 pm AST on 21 March 2017 ()
Where
in Las Ochenta, PR · earthquakes near Las Ochenta
Magnitude
M 2.7 (Md)
Depth
8.0 km below the surface
Felt
no reports yet
Nearest
Salinas Municipio, 6 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3521 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 24 km (15 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: Santa Isabel 9 km, intensity III · Coamo 13 km, intensity II · Río Cañas Abajo 18 km, intensity II · Guayama 22 km, intensity II · Cayey 22 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.8× the energy of this one
  4. This earthquake M 2.7 about 340 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 710 times the energy of this one.

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 · 38 km NNE 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 17.9706, -66.3180. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Salinas Municipio, PR 6 km (4 mi) E earthquakes near Salinas Municipio
Santa Isabel Municipio, PR 8 km (5 mi) WSW earthquakes near Santa Isabel Municipio
Coamo Municipio, PR 15 km (10 mi) NNW earthquakes near Coamo Municipio
Juana Díaz Municipio, PR 18 km (11 mi) W earthquakes near Juana Díaz Municipio
Aibonito Municipio, PR 19 km (12 mi) NNE earthquakes near Aibonito Municipio
Guayama Municipio, PR 19 km (12 mi) E earthquakes near Guayama 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. 2.4 11 km S of Emajagua, Puerto Rico
  2. 2.1 19 km S of Tallaboa, Puerto Rico
  3. 2.1 9 km ESE of Adjuntas, Puerto Rico
  4. 2.2 4 km S of Magas Arriba, 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. 2.7 9 km S of Emajagua, Puerto Rico
  13. 2.7 Puerto Rico region
  14. 2.4 26 km S of Ponce, Puerto Rico
  15. 2.3 0 km N of Pastos, 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.