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#Landslides

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Public
Calishat

#Malaysia #landslides #NaturalDisasters

'The Batang Kali landslide on December 16, 2022, left an indelible mark on Malaysia’s history, claiming 31 lives — 13 of them children.

What began as personal grief has now evolved into a powerful platform for healing and advocacy...

The website serves as a digital memorial where survivors reclaim their narrative and continue to demand accountability for what they argue was more than just an unfortunate natural disaster.'

malaymail.com/news/malaysia/20

Public
Politics Canada

Excessive logging and accelerated climate change bring further destruction to BC. "A study has found nearly half of the landslides, debris flows and washouts that occurred during British Columbia's atmospheric river disaster in November 2021 originated in areas that had been logged or burned by wildfire." #bc #logging #climatechange #environment #landslides cbc.ca/news/canada/british-col.

CBCNearly half of landslides during B.C. weather disaster linked to logging, wildfire, study finds | CBC NewsA study has found nearly half of the landslides, debris flows and washouts that occurred during British Columbia’s atmospheric river disaster in November 2021 originated in areas that had been logged or burned by wildfire.
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💧🌏 Greg Cocks

Seismometers Reveal Earth's Longest-Runout Undersea Sediment Flows In Unprecedented Detail
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phys.org/news/2025-02-seismome <-- shared technical article
--
doi.org/10.1038/s43247-025-021 <-- shared paper
--
doi.org/10.1016/j.geomorph.202 <-- shared paper
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doi.org/10.1038/s41561-022-010 <-- shared paper
--

cross section / schematic - Surge dynamics of canyon-flushing turbidity currents
Difference maps showing seabed changes (in metres) in the upper Congo Canyon between 2019 and 2020... The grey shaded base map shows seabed gradients in 2020. Shades of red correspond to areas of erosion, and blue to areas of deposition.
Bathymetric map of the Congo Canyon-Channel system and instrument placement
schematics - Schematic summary of the categories for types of seabed erosion observed in the Congo Canyon-channel between 2019 and 2020, and their relative volumetric importance
Public
Steve's Place

Good news from PBOT!

(Monday, Feb. 24, 2025) – The Portland Bureau of Transportation reopened NW Cornell Road and a lane on NW Thompson Road earlier than expected, after clearing landslide debris today.

Both roads were impacted by landslides late Sunday afternoon, that led to closures that were expected to impact the Monday morning commute and potentially last all day.

NW Cornell Road was reopened before noon today. It was closed to all travelers, between NW Skyline and NW Thompson Road. PBOT crews removed 30 cubic yards of material in two dump truck loads.

The westbound travel lane on NW Thompson was reopened before 2 p.m. today. It had been closed from NW Pinnacle Drive to NW Miller Road. This slide is at 8450 NW Thompson, the road just west of the intersection of NW Thompson Road and NW Skyline Blvd. PBOT crews removed 38 cubic yards of debris in 2 and a half dump truck loads.

#Portland#PDX#landslides
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Dr. Eric J. Fielding, PhD

NASA Radar Imagery Reveals Details About Los Angeles-Area Landslides. Landslides on Palos Verdes peninsula have been moving rapidly in last two years. NASA airborne radar called UAVSAR flies on piloted NASA planes and measures displacements of the ground surface using InSAR analysis. We requested flights in three directions to map motion of landslides on the Palos Verdes peninsula next to Los Angeles. #NASA #NASA_JPL #InSAR #radar #landslides

jpl.nasa.gov/news/nasa-radar-i

NASA Jet Propulsion Laboratory (JPL)NASA Radar Imagery Reveals Details About Los Angeles-Area LandslidesAnalysis of data from NASA radar aboard an airplane shows that the decades-old active landslide area on the Palos Verdes Peninsula has expanded.
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Anita Graser 🇪🇺🇺🇦🇬🇪

I really enjoyed the interdisciplinary collaboration sparked by the gAia project on predicting #landslides, resulting in our recent #preprint:

📝 "Visualizing uncertainties in landslide susceptibility modeling using bivariate mapping"

nhess.copernicus.org/preprints

nhess.copernicus.orgBrief communication: Visualizing uncertainties in landslide susceptibility modeling using bivariate mappingAbstract. Effectively communicating uncertainties inherent to statistical models is a challenging yet crucial aspect of the modeling process. This is particularly important in applied research, where output is used and interpreted by scientists and decision makers alike. In disaster risk reduction, susceptibility maps for natural hazards are vital for spatial planning and risk assessment. We present a novel type of landslide susceptibility map that jointly visualizes the estimated susceptibility and the corresponding prediction uncertainty, using an example from a mountainous region in Carinthia, Austria. We also provide implementation guidelines to create such maps using popular free and open-source software packages.
#QGIS#RStats#GIScience
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💧🌏 Greg Cocks

Postfire Debris-Flow Hazards
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usgs.gov/programs/landslide-ha <-- shared technical article / overview
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alturl.com/po3yj <-- USGS Post-Fire Debris Flow Hazard Assessment Viewer
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earthquake.usgs.gov/arcgis/res <-- Post-Fire Debris-Flow Hazards USGS spatial data / GIS Services
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@USGS

photo - A home damaged by the January 9, 2018 debris flow event in Montecito, California. The event was triggered by heavy rain on the Thomas Fire burn area above Montecito. This home is located near Buena Vista Creek.
screen shot centered on LA - USGS Post-Fire Debris Flow Hazard Assessment Viewer (web map)
photo - Debris Flow in Cable Canyon following the 2003 Old Fire in the San Bernardino Mountains, California
photo - Post-fire debris flow depositing ash and sediment on a steep hillside, 2021 Dixie Fire in northern CA
Public
BellingenNSW

The Case for Letting Malibu Burn
Bushfires and sprawl: Man-made catastrophes and cultural narratives

The lethal mixture of home ownership and the bush: Neighborhoods on fire.
"Since 1993. almost half of California’s new homes have been built in fire hazard areas...Commercial greed over common sense and the social good."

The aristocratisation of the coast
"In a feverish buying and selling of land, the coast has become utterly transformed and unrecognizable. Each succeeding house, bigger and grander, takes the view of its neighbors in a kind of unbridled competition.… Once lost, paradise can never be regained.… Developers have bulldozed the Santa Monicas beyond recovery."
>>
Mike Davis, Ecology of Fear: The Case for Letting Malibu Burn. 1998
longreads.com/2018/12/04/the-c

Ecology of Fear: Mike Davis’ history of LA and natural disaster is re-read whenever fire rages in California >>
theconversation.com/ecology-of
#bushfires #fires #firestorms #sprawl #housing #suburbs #mansions #OverDevelopment #coast #NSW #destruction #disasters #gridlocked #roads #highways #floods #landslides #WUI #FossilFuels #Biodiversity #Holocene #folly

Longreads · The Case for Letting Malibu BurnBy Longreads
Continued thread
Public
CelloMom On Cars

"#Indonesia and #Malaysia, the world’s two biggest palm oil producers, have been hit by deadly #landslides and power outages, while #Thailand and the #Philippines are facing severe #floods in some regions, according to government weather agencies. Elsewhere, #Singapore received about half of its normal November rainfall on a single day over the weekend."

bloomberg.com/news/articles/20

Bloomberg · Heavy Rains in Southeast Asia Flood Farms and Force EvacuationsBy Eko Listiyorini
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💧🌏 Greg Cocks

Linking Inca Terraces With Landslide Occurrence In The Ticsani Valley, Peru
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doi.org/10.3390/geosciences141 <-- shared paper
--
[takes me back to my engineering geology days in the Southern Hemisphere, including my thesis – with a healthy dose of spatial analysis and modeling – and all with a specific use; what is not to like?]

photo - terraces in part of the Ticsani Valley, Peru
photos - (A) The main fluvial landforms in the AOI. The Carumas river can be seen here to be bounded by landslides affecting a fluvial terrace covered by agricultural terraces. (B) Landslides affecting a slope close to a community in the AOI. Note the construction of terraces on prior landslide deposits.
schematic / cross-section - Typical profile of terraces built in Southern Peru. Wall rocks are directly piled over an excavated trench in bedrock without mortar. An upward decreasing gradation is used to fill the internal portion of the wall in compacted layers. Fertile arable soil is placed in the top 30 cm.
imagery / map / schematic cross-section - (A) A 3D view of the San Cristobal landslide. (B) A 1:50,000 geological map of the landslide area, modified from [33]. Ki-mat = Matalaque Fm. P-Pi = Puno Fm. Q-pl = colluvial deposits, debris avalanche. Qp-vl-pi = pyroclastic deposits. Red line marks the topographic cross-section shown in A. (C) Cross-section of the San Cristobal landslide with estimated base groundwater conditions (blue) and materials boundaries (green) to be used for modeling and interpreted potential failure surfaces (dashed red).
Public
Chris Rowan

This is very interesting: mobility of seismically triggered landslides (noisily) increases with size below a certain threshold, but above it mobility decreases with size.

My first (ignorant) hypothesis is that it's some sort of interaction between the seismic wave field and the failure surface...

eos.org/thelandslideblog/the-m

Eos · The mobility of landslides triggered by earthquakesBy Dave Petley
#geology#landslides#earthquake
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DoomsdaysCW

HT @northernlights

‘The land is tearing itself apart’: life on a collapsing #Arctic isle

On #Qikiqtaruk, off Canada, researchers at the frontier of #ClimateChange are seeing its rich ecology slide into the sea as #MeltingPermafrost ice leaves little behind

“It’s one thing to think about what the changes mean to us, but I can’t imagine the fear and stress the animals feel as everything changes so fast. We’re supposed to be the guardians of the land. But we’ve let them down.” - Richard Gordon.

By Leyland Cecco, on Herschel Island–Qikiqtaruk
November 21, 2024

"Armed with a fleet of drones and working closely with Indigenous Inuvialuit rangers, the team has revealed a rapid reshaping of the tundra with little precedent. As they race to understand what those changes might mean, a combination of rising seas, landslides and flooding mean the landscape is literally collapsing around them, making it harder to study an island that reflects the tumultuous future of the western Arctic."

theguardian.com/environment/20

The Guardian · ‘The land is tearing itself apart’: life on a collapsing Arctic isleBy Leyland Cecco
#Inuvialuit#ClimateCatastrophe#Permafrost
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