QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

Earthquake near Espino, PR

No earthquake was likely felt in Espino in the 24 hours to 8:08 am AST (12:08 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 2.6 earthquake was recorded 3 km (2 mi) north-northeast of Espino, PR, at 2:43 am AST on 31 March 2018 (06:43 UTC), 25 km deep.

USGS: 3 km NNE of Espino, Puerto Rico

12 km (7 mi) NNE of Mayagüez, PR · 111 km (69 mi) W of San Juan, PR

2:43 am AST, Mar 31, 2018 · · 25 km deep · released about 260 lb of TNT

Every earthquake near Espino Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Añasco Municipio 3 kmMoca Municipio 9 kmAguada Municipio 11 kmSan Sebastián Municipio 15 kmRincón Municipio 15 kmLas Marías Municipio 16 kmHormigueros Municipio 19 kmAguadilla Municipio 20 kmIsabela 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
2:43 am AST on 31 March 2018 ()
Where
3 km (2 mi) north-northeast of Espino, PR · earthquakes near Espino
Magnitude
M 2.6 (md)
Depth
25 km below the surface
Felt
no reports yet
Nearest
Añasco Municipio, 3 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3149 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 it was probably too small to be felt, even directly above it. In Espino, 3 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, La Playa, Luyando, Moca, Mayagüez.

How big was it?

This earthquake released about 260 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 59,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 42,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.7× the energy of this one
  4. This earthquake M 2.6 about 260 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 330 times the energy of this one.

Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 24 km NNW of San Antonio, Puerto Rico · 45 km N of this epicentre
  2. 6.4 32 km NW of Aguadilla, Puerto Rico · 45 km NW of this epicentre
  3. 6.3 6 km WNW of Aguadilla, Puerto Rico · 19 km NW of this epicentre
  4. 6.1 15 km WNW of San Antonio, Puerto Rico · 31 km NNW of this epicentre
  5. 6.1 18 km NNW of San Antonio, Puerto Rico · 38 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 18.3023, -67.1096. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Añasco Municipio, PR 3 km (2 mi) SW earthquakes near Añasco Municipio
Moca Municipio, PR 9 km (6 mi) NNE earthquakes near Moca Municipio
Aguada Municipio, PR 11 km (7 mi) NW earthquakes near Aguada Municipio
San Sebastián Municipio, PR 15 km (9 mi) ENE earthquakes near San Sebastián Municipio
Rincón Municipio, PR 15 km (10 mi) WNW earthquakes near Rincón Municipio
Las Marías Municipio, PR 16 km (10 mi) ESE earthquakes near Las Marías 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. 2.6 11 km NE of Isabela, Puerto Rico
  2. 2.5 17 km NW of San Antonio, Puerto Rico
  3. 1.8 9 km S of Pole Ojea, Puerto Rico
  4. 2.1 4 km NNE of Lluveras, Puerto Rico
  5. 1.8 4 km NNE of San Germán, Puerto Rico
  6. 1.9 5 km ESE of Las Marías, Puerto Rico
  7. 1.5 5 km NNW of Yauco, Puerto Rico
  8. 2.4 2 km ESE of Las Marías, Puerto Rico
  9. 1.8 4 km E of Las Marías, Puerto Rico
  10. 2.0 4 km E of Las Marías, Puerto Rico
  11. 1.6 2 km NW of Maricao, Puerto Rico
  12. 1.8 6 km NW of Boquerón, Puerto Rico
  13. 1.9 6 km NE of Maricao, Puerto Rico
  14. 2.1 4 km NE of Maricao, Puerto Rico
  15. 2.3 4 km ESE of Las Marías, 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.