QuakeIndex

Earthquake · reviewed by a seismologist

M 2.5md

138 km NNE of Suárez, Puerto Rico

Yes. A magnitude 2.5 earthquake was recorded 138 km NNE of Suárez, Puerto Rico, at 9:41 pm AST on 19 July 2019 (01:41 UTC), 47 km deep.

· 47 km deep · released about 150 lb 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 2.5 (md)
Depth
47 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2672 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause 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 150 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 99,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 70,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.2× the energy of this one
  4. This earthquake M 2.5 about 150 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 since 2016 was M 4.9 on 2018-11-14 — about 4,400 times the energy of this one.

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 · 36 km SE of this epicentre
  2. 5.1 92 km N of Suárez, Puerto Rico · 47 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 19.6436, -65.5490. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.7 132 km NNE of Vieques, Puerto Rico
  2. 3.4 101 km NNE of Suárez, Puerto Rico
  3. 3.5 106 km NNE of Vieques, Puerto Rico
  4. 2.6 Puerto Rico region
  5. 3.7 128 km NNE of Vieques, Puerto Rico
  6. 3.4 120 km NNE of Vieques, Puerto Rico
  7. 2.7 124 km NNE of Vieques, Puerto Rico
  8. 3.7 124 km NNE of Vieques, Puerto Rico
  9. 3.7 141 km NNE of Vieques, Puerto Rico
  10. 3.6 114 km NNE of Vieques, Puerto Rico
  11. 3.9 143 km NNE of Vieques, Puerto Rico
  12. 3.6 109 km NNE of Vieques, Puerto Rico
  13. 3.8 136 km NNE of Vieques, Puerto Rico
  14. 3.8 141 km NNE of Vieques, Puerto Rico
  15. 3.6 139 km NNE of Vieques, 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.