QuakeIndex

Earthquake · reviewed by a seismologist

M 4.4md

Mona Passage

Yes. A magnitude 4.4 earthquake was recorded in Mona Passage at 22:18 UTC on 2023-01-18, 151 km deep.

· 151 km deep · released about 64 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 105 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 4.4 (md)
Depth
151 km below the surface
Felt
no reports yet
Nearest
Mayagüez Municipio, 105 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1321 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

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.

How big was it?

This earthquake released about 64 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.4 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 2,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 120× the energy of this one
  3. Magna, Utah 2020 M 5.7 83× the energy of this one
  4. This earthquake M 4.4 about 64 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 130× 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 5.3 on 2019-02-04 — about 21 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 18.3773, -68.8271. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Mayagüez Municipio, PR 105 km (65 mi) ESE earthquakes near Mayagüez Municipio

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

Aftershocks so far

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

  1. 3.9 14 km ENE of Guaymate, Dominican Republic
  2. 4.0 37 km SSE of La Romana, Dominican Republic
  3. 3.9 38 km S of Boca de Yuma, Dominican Republic
  4. 3.8 9 km SE of Ramón Santana, Dominican Republic
  5. 3.9 32 km S of La Romana, Dominican Republic
  6. 3.7 22 km SSE of Boca de Yuma, Dominican Republic
  7. 3.9 13 km ESE of La Romana, Dominican Republic
  8. 3.6 31 km S of Boca de Yuma, Dominican Republic
  9. 3.7 37 km S of La Romana, Dominican Republic
  10. 4.0 10 km SW of San Rafael del Yuma, Dominican Republic
  11. 3.4 12 km WSW of San Rafael del Yuma, Dominican Republic
  12. 3.8 28 km S of Boca de Yuma, Dominican Republic
  13. 3.9 5 km SW of San Rafael del Yuma, Dominican Republic
  14. 3.6 Mona Passage
  15. 3.8 18 km SE of Boca de Yuma, Dominican Republic

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.