7.7 Quake West Coast of B.C…No Tsunami Threat

And impressive 7.7 magnitude quake struck about 90 minutes ago (sorry, I was Netflixing…) in the Haida Gwaii (Queen Charlotte) islands off the coast of British Columbia.  It was right along a main fault, well to the north of the Cascadia Subduction Zone.  2 aftershocks have followed.  The 7.7 was a 8:04pm, a 5.8 10 minutes later, then a 4.8 at 8:52pm.  The ground is rearranging itself up there!

There is still a Tsunami Warning for extreme SE Alaska and the central coast of British Columbia, but there has not been a threat this far south.  So no warning, watch, or advisory for our coastline.

Chief Meteorologist Mark Nelsen


15 Responses to 7.7 Quake West Coast of B.C…No Tsunami Threat

  1. lynn says:

    Keep me up to date. Im one of the vonteers for Vancouver, wa ARC. Think you.

  2. Vertical Vance says:

    As long as its popping it isn’t building pressure

  3. Mark Nelsen says:

    The warning for Alaska and BC was just dropped at 11:17pm. Now it’s just an advisory for Alaska to California. Hawaii still has a warning for an arrival around 1:30am our time.

    • pappoose in scappoose says:

      If my rubber boots didn’t have a hole in em, I’d be safe from the wave heights I’ve seen so far!

  4. pappoose in scappoose says:


  5. Roman~Snow-Zone-Monmouth, Elv. 223' says:

    Could be a potential foreshock, leading up to the “big one” just like what happened a few days before Japans Tohoku massive earthquake.. though their foreshock was a 7.3mag.

  6. kiki says:

    I looked on the fox 12 oregon web site 5 minutes Ago and it said that there was a warning for oregon.

  7. Do you think a quake of this size and in this proximity might help to “let off some steam” and make the future Big One not quite so devastating? Or is this far enough away, geographically, to not have much effect on future Cascadia Subduction quakes?

    • Jim says:

      Great question. I wonder if there is even a way to quantify potential earthquake energy.

    • kortiz503 says:

      thats what they say in Alaska that if they dont have little ones they will have one big on ,so I believe your right.

    • pdxgeologist says:

      Not likely to affect the Cascadia Subduction Zone (CSZ). The Queen Charlotte fault system is similar to the San Andreas Fault down south in that it is a transform fault with a strike slip sense of motion (the Pacific and North American tectonic plates moving past each other horizontally). The CSZ is associated with the down-thrusting of the Juan de Fuca plate beneath the North American plate.

  8. pappoose in scappoose says:

    Whole lotta shaking going on!

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