QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9ml

7 km E of El Factor, Dominican Republic

· 10 km deep · released about 11 tons of TNT

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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 (ml)
Depth
10 km below the surface
Felt
3 reports · strongest reported intensity V
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1632 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 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 16,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 710× the energy of this one
  3. Magna, Utah 2020 M 5.7 500× the energy of this one
  4. This earthquake M 3.9 about 11 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 22× 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 19.3066, -69.8217. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 4.5 3 km S of Sánchez, Dominican Republic
  2. 3.7 1 km E of Arroyo Salado, Dominican Republic
  3. 3.3 18 km NE of Las Terrenas, Dominican Republic
  4. 4.4 27 km ENE of Arroyo Salado, Dominican Republic
  5. 3.3 3 km WNW of Sabana de la Mar, Dominican Republic
  6. 4.2 5 km NW of Las Terrenas, Dominican Republic
  7. 4.3 6 km NNW of Castillo, Dominican Republic
  8. 4.1 8 km E of Gonzalo, Dominican Republic
  9. 4.1 9 km SSW of Sánchez, Dominican Republic
  10. 4.4 4 km WNW of Villa Riva, Dominican Republic
  11. 4.5 16 km NE of San Francisco de Macorís, Dominican Republic
  12. 4.4 5 km N of Villa Riva, Dominican Republic
  13. 4.2 3 km E of Río San Juan, 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 2018-06-03 — it released about 16 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.