QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Espino, PR

No earthquake was likely felt in Espino in the 24 hours to 5:37 pm AST (21:37 UTC). The last one was M 3.0, 35 km (22 mi) S, at 5:47 pm AST on 7 November 2026, estimated intensity II (weak) in town. Every earthquake near Espino

This page: a magnitude 2.1 earthquake was recorded 6 km (4 mi) east of Espino, PR, at 12:36 am AST on 23 July 2019 (04:36 UTC), 20 km deep.

USGS: 6 km E of Espino, Puerto Rico

12 km (7 mi) NE of Mayagüez, PR · 106 km (66 mi) W of San Juan, PR

12:36 am AST, Jul 23, 2019 · · 20 km deep · released about 49 lb of TNT

Every earthquake near Espino Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Añasco Municipio 8 kmLas Marías Municipio 10 kmSan Sebastián Municipio 12 kmMoca Municipio 12 kmHormigueros Municipio 17 kmMaricao Municipio 17 kmAguada Municipio 17 kmSan Germán Municipio 19 kmLares 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
12:36 am AST on 23 July 2019 ()
Where
6 km (4 mi) east of Espino, PR · earthquakes near Espino
Magnitude
M 2.1 (md)
Depth
20 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 8 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2669 days ago

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

At this magnitude and depth it was probably too small to be felt, even directly above it. In Espino, 6 km away, the estimate is intensity II (weak). 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.

Earthquakes near other towns within 30 km: Añasco, Las Marias, San Sebastián, Mayagüez, La Playa, Maricao.

How big was it?

This earthquake released about 49 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 5.8 310,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 220,000× 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 49 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 4.3 on 2017-10-14 — about 1,700 times the energy of this one.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 24 km NNW of San Antonio, Puerto Rico · 49 km NNW of this epicentre
  2. 6.3 6 km WNW of Aguadilla, Puerto Rico · 25 km NW of this epicentre
  3. 6.1 15 km WNW of San Antonio, Puerto Rico · 36 km NNW of this epicentre
  4. 6.1 18 km NNW of San Antonio, Puerto Rico · 42 km NNW of this epicentre
  5. 5.8 4 km E of Moca, Puerto Rico · 14 km N 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 18.2746, -67.0608. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Añasco Municipio, PR 8 km (5 mi) W earthquakes near Añasco Municipio
Las Marías Municipio, PR 10 km (6 mi) ESE earthquakes near Las Marías Municipio
San Sebastián Municipio, PR 12 km (7 mi) ENE earthquakes near San Sebastián Municipio
Moca Municipio, PR 12 km (7 mi) N earthquakes near Moca Municipio
Hormigueros Municipio, PR 17 km (10 mi) SSW earthquakes near Hormigueros Municipio
Maricao Municipio, PR 17 km (11 mi) SE earthquakes near Maricao Municipio

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

Aftershocks so far

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

  1. 1.6 6 km S of Guánica, Puerto Rico
  2. 2.1 14 km NW of Puerto Real, Puerto Rico
  3. 2.3 8 km WNW of Puerto Real, Puerto Rico
  4. 2.5 2 km NNE of Caban, Puerto Rico
  5. 1.8 3 km NW of Guayanilla, Puerto Rico
  6. 2.2 5 km WSW of La Parguera, Puerto Rico
  7. 2.0 7 km W of Puerto Real, Puerto Rico
  8. 2.3 6 km WSW of La Parguera, Puerto Rico
  9. 2.3 11 km N of Yauco, Puerto Rico
  10. 2.4 16 km NNW of Camuy, Puerto Rico
  11. 2.1 5 km SW of Palmarejo, Puerto Rico
  12. 2.5 7 km ENE of Hormigueros, Puerto Rico
  13. 2.1 9 km WNW of Puerto Real, Puerto Rico
  14. 2.1 25 km NW of Aguadilla, Puerto Rico
  15. 2.6 22 km N of San Antonio, 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.