QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

Mona Passage

Yes. A magnitude 2.5 earthquake was recorded in Mona Passage, 26 km (16 mi) WSW of Mayagüez, PR, at 8:46 pm AST on 9 May 2019 (00:46 UTC), 71 km deep.

26 km (16 mi) WSW of Mayagüez, PR · 142 km (88 mi) WSW of San Juan, PR

· 71 km deep · released about 180 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Rincón Municipio 25 kmCabo Rojo Municipio 27 kmHormigueros Municipio 28 kmAñasco Municipio 31 kmAguada Municipio 33 kmSan Germán Municipio 37 kmLajas Municipio 41 kmMoca Municipio 41 kmLas Marías Municipio 44 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 2.5 (md)
Depth
71 km below the surface
Felt
no reports yet
Nearest
Rincón Municipio, 25 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2743 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. 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: Puerto Real, Stella, Rincón, La Playa, Cabo Rojo, Boquerón.

How big was it?

This earthquake released about 180 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 83,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 59,000× the energy of this one
  3. Around the size people start to feel M 3.0 5.2× the energy of this one
  4. This earthquake M 2.5 about 180 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 470 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 18.1475, -67.3830. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Rincón Municipio, PR 25 km (16 mi) NNE earthquakes near Rincón Municipio
Cabo Rojo Municipio, PR 27 km (17 mi) SE earthquakes near Cabo Rojo Municipio
Hormigueros Municipio, PR 28 km (18 mi) E earthquakes near Hormigueros Municipio
Añasco Municipio, PR 31 km (19 mi) ENE earthquakes near Añasco Municipio
Aguada Municipio, PR 33 km (20 mi) NE earthquakes near Aguada Municipio
San Germán Municipio, PR 37 km (23 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

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

  1. 1.8 3 km NE of Sabana Grande, Puerto Rico
  2. 2.2 2 km WSW of Maricao, Puerto Rico
  3. 2.3 28 km W of Puerto Real, Puerto Rico
  4. 2.6 6 km SE of Aceitunas, Puerto Rico
  5. 1.9 6 km W of Maricao, Puerto Rico
  6. 2.1 Mona Passage
  7. 1.9 5 km W of Las Marías, Puerto Rico
  8. 2.5 59 km W of Rincón, Puerto Rico
  9. 2.3 26 km WNW of Rincón, Puerto Rico
  10. 1.6 3 km SSE of Palmarejo, Puerto Rico
  11. 1.9 14 km S of La Parguera, Puerto Rico
  12. 2.8 52 km WSW of Stella, Puerto Rico
  13. 2.6 51 km WSW of Stella, Puerto Rico
  14. 2.0 3 km NW of Cabo Rojo, Puerto Rico
  15. 2.3 4 km N of Puerto Real, 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.