QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9md

11 km ESE of Guaymate, Dominican Republic

· 109 km deep · released about 12 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Mayagüez Municipio 117 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 3.9 (md)
Depth
109 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Mayagüez Municipio, 117 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1790 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 12 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 14,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 640× the energy of this one
  3. Magna, Utah 2020 M 5.7 450× the energy of this one
  4. This earthquake M 3.9 about 12 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 25× 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.

Where

Epicentre 18.5486, -68.8825. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Mayagüez Municipio, PR 117 km (73 mi) WNW of here earthquakes near Mayagüez Municipio

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

Aftershocks so far

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

  1. 2.9 15 km N of Otra Banda, Dominican Republic
  2. 3.5 10 km SW of San Rafael del Yuma, Dominican Republic
  3. 3.7 27 km ESE of Miches, Dominican Republic
  4. 4.0 15 km SW of San Rafael del Yuma, Dominican Republic
  5. 3.9 12 km E of La Romana, Dominican Republic
  6. 4.2 13 km NNE of Otra Banda, Dominican Republic
  7. 4.1 7 km SW of Ram?n Santana, Dominican Republic
  8. 4.1 4 km E of Guaymate, Dominican Republic
  9. 4.1 13 km ENE of Guaymate, Dominican Republic
  10. 4.0 6 km SSW of Salvaleón de Higüey, Dominican Republic
  11. 3.9 14 km WSW of San Rafael del Yuma, Dominican Republic
  12. 3.9 14 km ENE of La Romana, Dominican Republic
  13. 3.7 16 km NNE of Otra Banda, Dominican Republic
  14. 4.0 18 km SW of San Rafael del Yuma, Dominican Republic
  15. 3.4 15 km SW of San Rafael del 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.7 on 2019-07-28 — it released about 14 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.