QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0md

Mona Passage

Yes. A magnitude 2.0 earthquake was recorded in Mona Passage, 8 km (5 mi) S of Mayagüez, PR, at 8:38 pm AST on 18 April 2019 (00:38 UTC), 5.0 km deep.

8 km (5 mi) S of Mayagüez, PR · 117 km (73 mi) WSW of San Juan, PR

· 5.0 km deep · released about 26 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 2 kmSan Germán Municipio 10 kmCabo Rojo Municipio 15 kmAñasco Municipio 18 kmLajas Municipio 19 kmLas Marías Municipio 20 kmSabana Grande Municipio 20 kmMaricao Municipio 21 kmRincón Municipio 27 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
Magnitude
M 2.0 (md)
Depth
5.0 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 2 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2764 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 15 km (9 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: Puerto Real 8 km, intensity II · Mayagüez 8 km, intensity II · San Germán 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 26 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 580,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 410,000× the energy of this one
  3. Around the size people start to feel M 3.0 36× the energy of this one
  4. This earthquake M 2.0 about 26 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 in our catalogue was M 4.3 on 2017-10-14 — about 3,200 times the energy of this one.

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 18.1260, -67.1305. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hormigueros Municipio, PR 2 km (1 mi) ENE earthquakes near Hormigueros Municipio
San Germán Municipio, PR 10 km (6 mi) ESE earthquakes near San Germán Municipio
Cabo Rojo Municipio, PR 15 km (9 mi) SSW earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 18 km (11 mi) N earthquakes near Añasco Municipio
Lajas Municipio, PR 19 km (12 mi) SSE earthquakes near Lajas Municipio
Las Marías Municipio, PR 20 km (12 mi) NE earthquakes near Las Marías Municipio

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

Aftershocks so far

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

  1. 2.1 5 km WSW of Las Marías, Puerto Rico
  2. 2.4 12 km WNW of Pole Ojea, Puerto Rico
  3. 2.1 3 km S of La Playa, Puerto Rico
  4. 1.8 3 km SW of Maricao, Puerto Rico
  5. 1.9 34 km WSW of Stella, Puerto Rico
  6. 2.8 14 km WSW of Stella, Puerto Rico
  7. 2.1 18 km S of Guánica, Puerto Rico
  8. 1.6 3 km WNW of Palmarejo, Puerto Rico
  9. 2.1 8 km WNW of Aguada, Puerto Rico
  10. 1.6 2 km NW of Puerto Real, Puerto Rico
  11. 1.7 2 km NNE of La Parguera, Puerto Rico
  12. 1.8 2 km N of Lluveras, Puerto Rico
  13. 1.7 3 km N of Lluveras, Puerto Rico
  14. 1.5 4 km WSW of Las Marías, Puerto Rico
  15. 1.8 20 km SW of Stella, 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.