QuakeIndex

Earthquake · reviewed by a seismologist

M 2.9md

Earthquake near Esperanza, PR

No earthquake was likely felt in Esperanza in the 24 hours to 4:22 pm AST (20:22 UTC). The last one was M 2.9, 23 km (14 mi) SE, at 12:08 pm AST on 29 October 2026, estimated intensity II (weak) in town. Every earthquake near Esperanza

This page: a magnitude 2.9 earthquake was recorded 7 km (4 mi) south of Esperanza, PR, at 6:13 pm AST on 3 August 2018 (22:13 UTC), 5.0 km deep.

USGS: 6 km S of Esperanza, Puerto Rico

75 km (46 mi) ESE of San Juan, PR

6:13 pm AST, Aug 3, 2018 · · 5.0 km deep · released about 630 lb of TNT

Every earthquake near Esperanza Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Vieques Municipio 11 kmCeiba Municipio 29 kmNaguabo Municipio 34 kmHumacao Municipio 35 kmCulebra Municipio 37 kmFajardo Municipio 41 kmYabucoa Municipio 41 kmLuquillo Municipio 45 kmMaunabo Municipio 45 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
6:13 pm AST on 3 August 2018 ()
Where
7 km (4 mi) south of Esperanza, PR · earthquakes near Esperanza
Magnitude
M 2.9 (md)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Vieques Municipio, 11 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3018 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 31 km (19 mi) from the epicentre. In Esperanza, 7 km away, the estimate is intensity III (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.

Likely felt in: Esperanza 7 km, intensity III · Isabel Segunda 13 km, intensity III · Aguas Claras 31 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 630 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 24,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 17,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.5× the energy of this one
  4. This earthquake M 2.9 about 630 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 380 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

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 18.0351, -65.4738. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Vieques Municipio, PR 11 km (7 mi) NNE earthquakes near Vieques Municipio
Ceiba Municipio, PR 29 km (18 mi) NNW earthquakes near Ceiba Municipio
Naguabo Municipio, PR 34 km (21 mi) NW earthquakes near Naguabo Municipio
Humacao Municipio, PR 35 km (22 mi) WNW earthquakes near Humacao Municipio
Culebra Municipio, PR 37 km (23 mi) NNE earthquakes near Culebra Municipio
Fajardo Municipio, PR 41 km (25 mi) NNW earthquakes near Fajardo Municipio

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

Aftershocks so far

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

  1. 2.1 36 km SSE of Esperanza, Puerto Rico
  2. 2.2 29 km SSW of Esperanza, Puerto Rico
  3. 1.8 11 km S of Emajagua, Puerto Rico
  4. 2.1 23 km S of Emajagua, Puerto Rico
  5. 1.8 9 km SSW of Emajagua, Puerto Rico
  6. 2.2 24 km SE of Emajagua, Puerto Rico
  7. 3.4 38 km SE of Esperanza, Puerto Rico
  8. 2.0 27 km S of Emajagua, Puerto Rico
  9. 1.8 8 km SE of Esperanza, Puerto Rico
  10. 1.9 9 km S of Emajagua, Puerto Rico
  11. 2.1 10 km S of Emajagua, Puerto Rico
  12. 2.8 9 km SSW of Emajagua, Puerto Rico
  13. 1.8 9 km S of Emajagua, Puerto Rico
  14. 3.1 29 km ESE of Esperanza, Puerto Rico
  15. 2.6 5 km SE of Esperanza, 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.