QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Mona Passage

Yes. A magnitude 2.1 earthquake was recorded in Mona Passage, 15 km (9 mi) WSW of Mayagüez, PR, at 3:57 pm AST on 13 June 2017 (19:57 UTC), 23 km deep.

15 km (9 mi) WSW of Mayagüez, PR · 130 km (81 mi) WSW of San Juan, PR

· 23 km deep · released about 43 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Hormigueros Municipio 16 kmCabo Rojo Municipio 18 kmAñasco Municipio 22 kmRincón Municipio 23 kmSan Germán Municipio 24 kmAguada Municipio 28 kmLajas Municipio 30 kmLas Marías Municipio 32 kmMoca Municipio 33 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 2.1 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
Hormigueros Municipio, 16 km E
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3438 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause 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, Cabo Rojo, Hormigueros, Mayagüez, Boquerón, Monte Grande.

How big was it?

This earthquake released about 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 250,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 43 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.

Where

Epicentre 18.1370, -67.2663. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Hormigueros Municipio, PR 16 km (10 mi) E earthquakes near Hormigueros Municipio
Cabo Rojo Municipio, PR 18 km (11 mi) SSE earthquakes near Cabo Rojo Municipio
Añasco Municipio, PR 22 km (14 mi) NE earthquakes near Añasco Municipio
Rincón Municipio, PR 23 km (14 mi) N earthquakes near Rincón Municipio
San Germán Municipio, PR 24 km (15 mi) E earthquakes near San Germán Municipio
Aguada Municipio, PR 28 km (17 mi) NNE earthquakes near Aguada Municipio

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

Aftershocks so far

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

  1. 1.9 14 km SSW of Guánica, Puerto Rico
  2. 1.9 3 km SE of La Parguera, Puerto Rico
  3. 2.6 10 km NW of Puerto Real, Puerto Rico
  4. 2.3 2 km NE of Hormigueros, Puerto Rico
  5. 1.6 4 km ESE of La Parguera, Puerto Rico
  6. 1.7 1 km SW of Cabo Rojo, Puerto Rico
  7. 2.3 10 km S of Lares, Puerto Rico
  8. 2.7 27 km WNW of Rincón, Puerto Rico
  9. 1.8 5 km NNE of San Germán, Puerto Rico
  10. 2.5 10 km WSW of Adjuntas, Puerto Rico
  11. 2.9 5 km SW of Las Marías, Puerto Rico
  12. 1.9 Puerto Rico region
  13. 2.2 2 km SW of San Sebastián, Puerto Rico
  14. 2.8 4 km SW of Las Marías, Puerto Rico
  15. 2.0 12 km S of La Parguera, 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

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