QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3md

139 km NNE of Suárez, Puerto Rico

Yes. A magnitude 3.3 earthquake was recorded 139 km NNE of Suárez, Puerto Rico, at 9:22 pm AST on 5 February 2019 (01:22 UTC), 64 km deep. 1 person has reported feeling it to USGS.

· 64 km deep · released about 1.5 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 3.3 (md)
Depth
64 km below the surface
Felt
1 report · strongest reported intensity II
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2757 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 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 1.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 110,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 4,900× the energy of this one
  3. Magna, Utah 2020 M 5.7 3,500× the energy of this one
  4. This earthquake M 3.3 about 1.5 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 3.2× 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:

  1. 5.1 122 km NNE of Vieques, Puerto Rico · 38 km SE of this epicentre
  2. 5.1 92 km N of Suárez, Puerto Rico · 48 km SSW of this epicentre

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 19.6631, -65.5628. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.4 137 km NNE of Vieques, Puerto Rico
  2. 3.2 129 km N of Culebra, Puerto Rico
  3. 3.4 150 km NNE of Vieques, Puerto Rico
  4. 3.3 111 km NNE of Suárez, Puerto Rico
  5. 3.2 112 km NNE of Suárez, Puerto Rico
  6. 3.6 144 km NNE of Vieques, Puerto Rico
  7. 2.7 115 km NNE of Vieques, Puerto Rico
  8. 2.9 134 km NNW of Charlotte Amalie, U.S. Virgin Islands
  9. 3.1 116 km NNE of Suárez, Puerto Rico
  10. 3.4 116 km NNE of Suárez, Puerto Rico
  11. 2.8 109 km N of Suárez, Puerto Rico
  12. 2.2 101 km N of Suárez, Puerto Rico
  13. 2.5 112 km NNE of Suárez, Puerto Rico
  14. 2.7 115 km NNE of Vieques, Puerto Rico
  15. 3.4 156 km N of Charlotte Amalie, U.S. Virgin Islands

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.