QuakeIndex

Earthquake · reviewed by a seismologist

M 6.2mww

250 km WNW of Port McNeill, Canada

· 10 km deep · released about 30 kilotons 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 6.2 (mww)
Depth
10 km below the surface
Felt
75 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 287 days ago

A magnitude 6.2 earthquake was recorded 250 km WNW of Port McNeill, Canada at 04:30 UTC on 2019-07-04. 75 people have reported feeling it to USGS. This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area.

How big was it?

This earthquake released about 30 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.2 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 22× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 11× the energy of this one
  3. Northridge, California 1994 M 6.7 5.6× the energy of this one
  4. This earthquake M 6.2 about 30 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 4× more
  6. Magna, Utah 2020 M 5.7 this one released 5.6× 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

The largest earthquake within 50 km in our catalogue was M 4.9 on 2018-08-21.

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 51.2369, -130.5005. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.9 247 km WNW of Port McNeill, Canada
  2. 4.1 264 km WNW of Port McNeill, Canada
  3. 4.2 286 km WNW of Port McNeill, Canada
  4. 4.2 268 km WNW of Port McNeill, Canada
  5. 4.7 279 km WNW of Port McNeill, Canada
  6. 4.0 270 km WNW of Port McNeill, Canada
  7. 6.5 271 km WNW of Port McNeill, Canada
  8. 4.3 224 km W of Port McNeill, Canada
  9. 4.4 230 km W of Port McNeill, Canada
  10. 5.5 229 km W of Port McNeill, Canada
  11. 4.5 213 km W of Port McNeill, Canada
  12. 4.3 234 km W of Port McNeill, Canada
  13. 4.2 219 km W of Port McNeill, Canada
  14. 4.0 262 km WNW of Port McNeill, Canada
  15. 4.4 283 km WNW of Port McNeill, Canada

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.