Lightnews — Scholar-powered news

Reposted by Marc-André Brideau

Dave Petley @davepetley.bsky.social · 22h

The 17 December 2024 Takhini River landslide and river-ice tsunami in Whitehorse, Yukon, Canada highlights the role of progressive failure in frozen materials.
eos.org/thelandslide...

Surface elevation change detection comparing 2013 lidar DTM to a 2025 DSM created from UAV photos for the Takhini River landslide.

3 17

Marc-André Brideau @mabrideau.bsky.social · 1d

Had a great day in the field yesterday. Between Woss and Zeballos on Vancouver Island.

Mountain at sunrise. The peak had an unusual shape with a column of rock sticking out.

Fish eye lens view of mountains as seen from a forestry cut block.

Distal mountain range in background and logging road in foreground.

5

Reposted by Marc-André Brideau

Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · 5d

🚨FOUR tenure track positions in my dept @ucalgary.bsky.social @ucalgaryscience.bsky.social in applied & computational geophysics, subsurface geochemistry, sedimentary geology, and sustainable soil science. careers.ucalgary.ca/search/jobs?...

(please reskeet widely!) #academicsky 🧪⚒️🇨🇦

Opportunities matching 'earth'

Search 4 Careers available at University of Calgary.

careers.ucalgary.ca

58 60

Marc-André Brideau @mabrideau.bsky.social · 9d

Over the last three years, @drewbrayshaw.bsky.social, @geocron.bsky.social, me, and twelve colleagues have been compiling a Preliminary Canadian Landslide Database. Version 12 is now available and contains 25,500 entries.
zenodo.org/records/1721...

Overview map of Canada with location points of 25,550 landslides symbolized according to 30 landslide types. Background image is a combination of ESRI satellite imagery and hillshade of the NRCan High Resolution Digital Elevation Model (HRDEM)

Overview map of Canada with location points of 25,550 landslides symbolized according to what version of the database they were last modified. It shows that more than half they entries were added or modified in the latest version. Background image is a combination of ESRI satellite imagery and hillshade of the NRCan High Resolution Digital Elevation Model (HRDEM)

5 13

Reposted by Marc-André Brideau

Brendan O’Neill @permafrostee.bsky.social · 15d

IT’S ALIVE! The Glossary of Permafrost Science and Engineering is released and available to all for free! Spread the news! You can download it here: canadianpermafrostassociation.ca/glossary-of-...

Dr Toni Lewkowicz launching the glossary!

2 8 11

Marc-André Brideau @mabrideau.bsky.social · Jul 23

You can now submit your abstract for the Geohazards 9 conference next June in Edmonton Alberta
www.geohazards9.ca/call-for-abs...

Submit | Geohazards 9

www.geohazards9.ca

1 1

Marc-André Brideau @mabrideau.bsky.social · Jul 20

Interesting landslide landscape visible in the newly available 2024 lidar along the Fraser River. Lidar from lidar.gov.bc.ca/pages/downlo...
Landslide outlines from www.frdr-dfdr.ca/repo/dataset...
Landslide points from zenodo.org/records/1529...

Hillshade view of 2024 lidar along Fraser River showing 1.5km+ wide low angle landslide

2 2 27

Marc-André Brideau @mabrideau.bsky.social · Jul 17

the new Landslide Mapping Guidelines from Engineers and Geoscientists British Columbia are now available. A useful document for geohazard practitioners in British Columbia (and beyond).
tools.egbc.ca/Registrants/...

tools.egbc.ca

3 6

Marc-André Brideau @mabrideau.bsky.social · Jun 27

Not sure, the pre-failure imagery from esri shows small scale instabilities and talus along the runout path. Could be runup, or entrainment, or secondary failures.

True colour pre-failure imagery from esri

1

Marc-André Brideau @mabrideau.bsky.social · Jun 27

The July 26, 2022 imagery has a nice view of the source area

July 26, 2022 false colour imagery that has good view of both the source and deposit areas.

1

Marc-André Brideau @mabrideau.bsky.social · Jun 27

Sentinel imagery suggest it happened between June 26, 2022 and June 29, 2022

June 26, 2022 false colour Sentinel imagery with no landslide deposit

June 29, 2022 false colour Sentinel imagery with landslide deposit

1 1

Reposted by Marc-André Brideau

Dave Petley @davepetley.bsky.social · Jun 18

Derek Cronmiller of the Yukon Geological Survey has provided a stunning set of the images of the fascinating recent failure that partially blocked the Yukon River. This is a textbook example of a complex rotational landslide:-
eos.org/thelandslide...

The May 2025 Yukon River landslide, viewed from a drone. Image copyright the Yukon Geological Survey, used with permission.

The uplifted toe of the May 2025 Yukon River landslide. Image copyright the Yukon Geological Survey, used with permission.

Back-tilted blocks in the May 2025 Yukon River landslide. Image copyright the Yukon Geological Survey, used with permission.

20 48

Marc-André Brideau @mabrideau.bsky.social · May 23

Yes there appears to be a few additional potential landslide features not currently in the SIGÉOM inventory. That landslide layer is part of the provincial surficial geology compilation. Not sure what year it was done and if lidar was available at the time.

1

Marc-André Brideau @mabrideau.bsky.social · May 23

A landslide in quick (sensitive) clay in central Québec this week as been featured in the news.
www.cbc.ca/news/canada/...
Lidar and previous landslide inventory support the statement in the news report that landslides have occurred in the area before.

Close-up of the outlines and point locations of previous landslides relative to the May 21, 2025 landslide. background image from NRCan lidar.

Overview of the outlines and point locations of previous landslides relative to the May 21, 2025 landslide. background image from NRCan lidar.

2024 satellite imagery from Google Earth of the area where the May 21, 2025 landslide occurrred.

1 2 10

Marc-André Brideau @mabrideau.bsky.social · Apr 29

Nice ones!!!

1 1

Marc-André Brideau @mabrideau.bsky.social · Mar 8

WHOA!!!

1

Marc-André Brideau @mabrideau.bsky.social · Feb 13

There is 2021 lidar available from (lidar.gov.bc.ca/pages/downlo...) for that feature. It suggest that the local relief is only ~260m.

1 7

Reposted by Marc-André Brideau

Jamie Shulmeister @jamie-shulmeister.bsky.social · Feb 9

I am pleased to report that we are now accepting abstracts for the 11th International Conference on #Geomorphology in Christchurch New Zealand in February 2026. #geoscience #hazards #rivers #tectonics #glaciers #coasts #landslides

Please repost.

www.confer.co.nz/icg2026/call...

Call For Abstracts - 2026 IAG International Conference on Geomorphology

Call for Abstracts Abstract Submissions Now Open! Click the button to the right to begin your abstract submission. SUBMIT YOUR ABSTRACT HERE Abstract

www.confer.co.nz

2 3

Marc-André Brideau @mabrideau.bsky.social · Jan 30

Very interesting new paper by former colleagues Carie-Ann Hancock and Kyle Wlodarczyk on the role of wildfires and forest harvesting on geohazards and channel stability during the November 2021 atmospheric river in SW British Columbia, Canada. onlinelibrary.wiley.com/doi/full/10....

The role of wildfires and forest harvesting on geohazards and channel instability during the November 2021 atmospheric river in southwestern British Columbia, Canada

During the November 2021 atmospheric river in British Columbia, Canada, hundreds of landslides were triggered. We found that geohazards occurred more frequently in wildfire burned areas and along for...

onlinelibrary.wiley.com

5

Marc-André Brideau @mabrideau.bsky.social · Jan 22

The next Canadian Geohazards Conference will be June 1-3, 2026 in Edmonton Alberta. You can register for updates at geohazards9.ca

GeoHazards 9

June 1-3, 2026 Edmonton, Alberta

geohazards9.ca

1

Marc-André Brideau @mabrideau.bsky.social · Dec 24

Watch out Calgary you might loose your tie for fifth place

2

Reposted by Marc-André Brideau

ETH Zurich @ethz.ch · Dec 13

Brienz has just been evacuated for the second time. The decision is based, among other things, on thousands of simulations that ETH professor Jordan Aaron has produced using a computer model he developed. In an interview with ETH News, he explains why this model was used.

“We needed to know how far and how fast the event could travel”

Brienz has just been evacuated for the second time. The decision is based, among other things, on thousands of simulations that ETH professor Jordan Aaron has produced using a computer model he develo...

ethz.ch

8 24

Marc-André Brideau @mabrideau.bsky.social · Dec 8

Really interesting article and radio interview about landslide early warning systems in British Columbia and Alaska. Featuring the work by @volcancanuck.bsky.social
www.cbc.ca/radio/whaton...

Microphones and rain buckets are being used to help detect landslides before they happen | CBC Radio

Scientists say giving people hours, or even a few minutes, of early warning has grown in importance, as climate change makes natural disasters more common and dangerous than ever before.

www.cbc.ca

2 6

Marc-André Brideau @mabrideau.bsky.social · Dec 3

Pretty scenery this morning in Selbu, Trøndelag county, Norway

7

Marc-André Brideau @mabrideau.bsky.social · Dec 2

If you are a professional geoscientist or engineering in British Columbia, Canada, there is a new Artificial Intelligence Practice Advisory from EGBC.
www.egbc.ca/News/Article...

New Practice Advisory on AI

www.egbc.ca

2 6