QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

Mona Passage

Yes. A magnitude 3.3 earthquake was recorded in Mona Passage, 22 km (14 mi) WSW of Mayagüez, PR, at 3:24 pm AST on 13 May 2019 (19:24 UTC), 14 km deep. 1 person has reported feeling it to USGS.

22 km (14 mi) WSW of Mayagüez, PR · 138 km (86 mi) WSW of San Juan, PR

· 14 km deep · released about 1.3 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Rincón Municipio 23 kmHormigueros Municipio 24 kmCabo Rojo Municipio 24 kmAñasco Municipio 27 kmAguada Municipio 30 kmSan Germán Municipio 32 kmLajas Municipio 37 kmMoca Municipio 37 kmLas Marías Municipio 39 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 3.3 (md)
Depth
14 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Rincón Municipio, 23 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2659 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 49 km (30 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 18 km, intensity II · Mayagüez 22 km, intensity II · Rincón 23 km, intensity II · Pole Ojea 26 km, intensity II · Aguada 30 km, intensity II · San Germán 32 km, intensity II · Aguadilla 37 km, intensity II · San Sebastián 42 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 6,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,300× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.6× more

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 34 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 18.1510, -67.3408. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Rincón Municipio, PR 23 km (14 mi) NNE earthquakes near Rincón Municipio
Hormigueros Municipio, PR 24 km (15 mi) E earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 24 km (15 mi) SE earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 27 km (17 mi) NE earthquakes near Añasco Municipio
Aguada Municipio, PR 30 km (19 mi) NNE earthquakes near Aguada Municipio
San Germán Municipio, PR 32 km (20 mi) E earthquakes near San Germán 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. 1.7 6 km SSW of Pole Ojea, Puerto Rico
  2. 2.4 5 km NE of Sabana Grande, Puerto Rico
  3. 1.8 7 km NE of Sabana Grande, Puerto Rico
  4. 2.0 5 km NNE of Sabana Grande, Puerto Rico
  5. 1.8 12 km WNW of Puerto Real, Puerto Rico
  6. 2.2 5 km NE of Sabana Grande, Puerto Rico
  7. 1.8 3 km NE of Sabana Grande, Puerto Rico
  8. 2.7 3 km N of Juncal, Puerto Rico
  9. 2.2 2 km WSW of Maricao, Puerto Rico
  10. 2.3 28 km W of Puerto Real, Puerto Rico
  11. 2.6 6 km SE of Aceitunas, Puerto Rico
  12. 1.9 6 km W of Maricao, Puerto Rico
  13. 2.1 Mona Passage
  14. 1.9 5 km W of Las Marías, Puerto Rico
  15. 2.3 26 km WNW of Rincón, 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.