QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0md

Mona Passage

Yes. A magnitude 3.0 earthquake was recorded in Mona Passage, at 8:05 am AST on 24 September 2019 (12:05 UTC), 10 km deep.

· 10 km deep · released about 800 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Aguadilla Municipio 89 kmIsabela Municipio 93 kmQuebradillas Municipio 98 kmAguada Municipio 100 kmMoca Municipio 102 kmRincón Municipio 103 kmCamuy Municipio 103 kmHatillo Municipio 107 kmSan Sebastián Municipio 110 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 3.0 (md)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Aguadilla Municipio, 89 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2518 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 33 km (21 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.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 6.0 on 2019-09-24 — about 38,000 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 19.2608, -67.3325. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Aguadilla Municipio, PR 89 km (55 mi) SSE earthquakes near Aguadilla Municipio
Isabela Municipio, PR 93 km (58 mi) SSE earthquakes near Isabela Municipio
Quebradillas Municipio, PR 98 km (61 mi) SSE earthquakes near Quebradillas Municipio
Aguada Municipio, PR 100 km (62 mi) S earthquakes near Aguada Municipio
Moca Municipio, PR 102 km (63 mi) SSE earthquakes near Moca Municipio
Rincón Municipio, PR 103 km (64 mi) S earthquakes near Rincón Municipio

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

Aftershocks so far

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

  1. 2.9 82 km NNW of San Antonio, Puerto Rico
  2. 2.8 58 km N of San Antonio, Puerto Rico
  3. 3.1 84 km NNW of San Antonio, Puerto Rico
  4. 2.9 57 km N of San Antonio, Puerto Rico
  5. 2.9 58 km N of Isabela, Puerto Rico
  6. 2.9 88 km NNW of San Antonio, Puerto Rico
  7. 4.4 61 km N of San Antonio, Puerto Rico
  8. 2.7 56 km N of San Antonio, Puerto Rico
  9. 2.6 61 km N of San Antonio, Puerto Rico
  10. 2.4 59 km N of San Antonio, Puerto Rico
  11. 2.7 84 km NNW of San Antonio, Puerto Rico
  12. 3.6 103 km NNW of San Antonio, Puerto Rico
  13. 4.8 66 km N of San Antonio, Puerto Rico
  14. 2.6 81 km NNW of San Antonio, Puerto Rico
  15. 3.5 98 km NNW of San Antonio, 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.