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[RalphH]

A massive landslide near Bute Inlet has had an effect of the Southgate River and may effect fisheries near Campbell River:

https://globalnews.ca/news/7521913/helicopter-video-huge-landslide-remote-bute-inlet/

[Blood_Orange]

The link leads to a 2018 story about seals... tried searching the site for "landslide" but couldn't find the relevant article.

[RalphH]

Oops - fixed it.

[clarki]

Hard to imagine at wave 70-100m in height in a lake just 2 km long

[RalphH]

Hard to imagine at wave 70-100m in height in a lake just 2 km long

Try this one:

Litya Bay Alaska:

The earthquake triggered a collapse of a rockmass on a steep, recently debuttressed slope at the toe of the glacier at the top of the fjord (Fig. 3). The rockfall was large (probably about 40 million cubic metres) and catastrophic, falling as a single coherent mass into the fjord from a height of about 900 metres (fig. 4). The fall triggered a wave in the fjord that raced from the landslide to the mouth of the fjord. The descriptions of this wave are remarkable, but are quite well shown in Fig. 5. The wave had a maximum run-up height (this is the vertical distance that it ran up the valley wall) of 530 metres. Whilst this sounds extreme, there is clear evidence that this was the case from sediments left by the wave and from the removal of trees by the water.

https://blogs.agu.org/landslideblog/2008/07/09/lituya-bay-50-years-on/

There is a risk for a similar landslide and tsunami on Mt Breakenridge which would slide into Harrison Lake:

https://en.wikipedia.org/wiki/Mount_Breakenridge

plus 3 or so paleo-landslides in Harrison Lake itself.

Overall the last decades we've become more and more aware we live in a geologically risky area.

[wildmanyeah]

First Nations in the area are proposing a hatchery site there now to offset food requirements.