QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

Mona Passage

Yes. A magnitude 2.7 earthquake was recorded in Mona Passage, 11 km (7 mi) ESE of Mayagüez, PR, at 4:31 am AST on 12 October 2022 (08:31 UTC), 23 km deep.

11 km (7 mi) ESE of Mayagüez, PR · 106 km (66 mi) WSW of San Juan, PR

· 23 km deep · released about 330 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Germán Municipio 8 kmLas Marías Municipio 9 kmHormigueros Municipio 9 kmMaricao Municipio 11 kmSabana Grande Municipio 14 kmAñasco Municipio 15 kmSan Sebastián Municipio 19 kmLares Municipio 21 kmYauco Municipio 22 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 2.7 (md)
Depth
23 km below the surface
Felt
no reports yet
Nearest
San Germán Municipio, 8 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1491 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 9 km (6 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.

Earthquakes near other towns within 30 km: Maricao, Hormigueros, Mayagüez, San Germán, Sabana Eneas, Monte Grande.

How big was it?

This earthquake released about 330 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 46,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 33,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.9× the energy of this one
  4. This earthquake M 2.7 about 330 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 6.4 on 2020-01-07 — about 370,000 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 18.1783, -67.0415. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Germán Municipio, PR 8 km (5 mi) S earthquakes near San Germán Municipio
Las Marías Municipio, PR 9 km (5 mi) NE earthquakes near Las Marías Municipio
Hormigueros Municipio, PR 9 km (6 mi) WSW earthquakes near Hormigueros Municipio
Maricao Municipio, PR 11 km (7 mi) E earthquakes near Maricao Municipio
Sabana Grande Municipio, PR 14 km (9 mi) SE earthquakes near Sabana Grande Municipio
Añasco Municipio, PR 15 km (10 mi) NW earthquakes near Añasco Municipio

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

Aftershocks so far

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

  1. 2.6 11 km S of Guánica, Puerto Rico
  2. 2.0 3 km SW of La Parguera, Puerto Rico
  3. 1.9 2 km SSE of Guánica, Puerto Rico
  4. 2.2 4 km SW of Indios, Puerto Rico
  5. 2.3 6 km WSW of Fuig, Puerto Rico
  6. 1.7 1 km S of Guánica, Puerto Rico
  7. 2.5 5 km SSW of Indios, Puerto Rico
  8. 2.6 4 km SSE of Maria Antonia, Puerto Rico
  9. 2.5 2 km SSW of Guánica, Puerto Rico
  10. 2.0 5 km E of La Parguera, Puerto Rico
  11. 2.4 3 km SSE of Maria Antonia, Puerto Rico
  12. 2.3 6 km SW of Guánica, Puerto Rico
  13. 2.6 8 km SSW of Tallaboa, Puerto Rico
  14. 2.6 8 km SSE of Guánica, Puerto Rico
  15. 2.3 3 km SE of Indios, 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.