Sign in

Dave Petley

@davepetley.bsky.social
2.6K followers 331 following 757 posts

Vice-Chancellor and President at NTU. Landslides, hazards, risk, vulnerability and resilience, plus a bit of campus life and my beloved Coventry City FC. #pusb

PostsRepliesMedia
Dave Petley @davepetley.bsky.social · 14h
Examination of @planet.com satellite imagery before the 26 August 2026 Langtang Lirung landslide in Nepal, which initiated the massive debris flow and flood, suggests that there were surprisingly few signs of incipient failure:- eos.org/thelandslide...
Satellite image draped onto the Google Earth DEM for the Langtung Lirung landslide. Image copyright Planet Labs, used with permission, collected on 25 August 2026.
13516
Dave Petley @davepetley.bsky.social · 30/09/2026
Praful Rao has posted a very moving description of the impact of the 26 August 2026 Nepal-Tibet landslide and debris flow on the Save the Hills blog:- savethehills.blogspot.com/2026/09/the-...
savethehills.blogspot.com
The Nepal disaster (26Aug2026): The story of a woman
SaveTheHills(STH) is a group of concerned citizens who are raising awareness about landslides in Darjeeling-Sikkim Himalaya. Many landslides are the direct or indirect result of human interference and preventable if sufficient care is taken. As such, unless we begin a comprehensive and sustained program towards landslide management, prevention and mitigation, the consequences of ignoring years of human callousness will, in the future be devastating.
052
Dave Petley @davepetley.bsky.social · 30/09/2026
On 6 August 2025, the Dayuan landslide in Guangzhou, China killed 7 people. It was triggered by rainfall onto an area affected by a wildfire a few months earlier. eos.org/thelandslide...
Google Earth image of the location of the 6 August 2025 Dayuan landslide.
042
Dave Petley @davepetley.bsky.social · 29/09/2026
On 27 September 2026, a large landslide at Lete on the Kaligandaki River in Nepal was captured on a very good video. eos.org/thelandslide...
Google Earth image of the site of the 27 September 2026 landslide on the Kaligandaki River in Nepal.
11810
Dave Petley @davepetley.bsky.social · 28/09/2026
Heavy rainfall in Nepal since Thursday has triggered 285 landslides, leading to 15 fatalities with a further three people missing and three people injured. eos.org/thelandslide...
Recorded landslide incidents in Nepal in the period 24 to 28 September 2026, via the Bipad portal.
22111
Reposted by Dave Petley
Jonathan Calder @lordbonkers.bsky.social · 19/09/2026
One for every Labour MP to read. #ldconf
lincolnshirelive.co.uk
30 years ago, Lincoln was 'on its knees' - then the university arrived
The construction of the University of Lincoln marked a turning point in the city's fortunes
014754
Dave Petley @davepetley.bsky.social · 24/09/2026
A new paper (He et al. 2026) in the journal Landslides describes the breach of the massive Matai'an Rover landslide dam in Taiwan in September 2025, which killed 24 people. eos.org/thelandslide...
The aftermath of the Matai'an landslide dam breach. Image using images from Planet Labs, from He et al. (2025).
0135
Dave Petley @davepetley.bsky.social · 22/09/2026
In Japan, record breaking rainfall associated with Typhoon Dujuan has triggered at least six fatal landslides in the Kanto region:- eos.org/thelandslide... Image by James Reynolds / EarthUncutTV - www.youtube.com/earthuncuttv
A debris flow on Highway 34 near Kyonan Hota IC in Chiba triggered by Typhoon Dujuan. Image tweeted by James Reynolds.
082
Dave Petley @davepetley.bsky.social · 21/09/2026
On Wednesday 7 October 2026 at 6 pm I will deliver my NTU inaugural lecture entitled “Landslides in a changing climate”. This is a public lecture, so please do come along. www.ntu.ac.uk/about-us/eve...
ntu.ac.uk
Professor Dave Petley's Inaugural Lecture
In this Inaugural Lecture, Professor Dave Petley, Vice-Chancellor and President of NTU, will examine the links between climate and landslides, drawing on examples from New Zealand, the Himalayas and t...
091
Reposted by Dave Petley
Eos @eos.org · 16/09/2026
Have you been keeping up with @davepetley.bsky.social's coverage of the debris flow in Nepal and Tibet over in our Landslide Blog? Here's a roundup. ⬇️
195
Dave Petley @davepetley.bsky.social · 16/09/2026
A new paper in the journal Landslides (Wang et al. 2026) suggests that the bedrock failure that initiated the Nepal landslide disaster may have displayed measurable precursory deformation. eos.org/thelandslide...
Google Earth image from 2017 showing the site of the 26 August 2026 landslide in Nepal.
2165
Dave Petley @davepetley.bsky.social · 15/09/2026
"Snake Pass slips may top £100m, council says" www.bbc.co.uk/news/article... I suspect that a permanent solution to them all would be very considerably more than £100 million.
bbc.co.uk
Snake Pass landslips may top £100m, Derbyshire Councty Council says
Derbyshire County Council says the amount of money needed for repairs is "beyond our means".
030
Reposted by Dave Petley
Ilan Kelman @ilankelman.bsky.social · 15/09/2026
Hazards Conference for geography students/teachers, England: -London, 11 Nov, www.kcmconferences.co.uk/events-detai... -Manchester, 16 Nov, www.kcmconferences.co.uk/events-detai... -Nottingham, 2 Dec, www.kcmconferences.co.uk/events-detai... @davepetley.bsky.social @proffionatweed.bsky.social #DRR
kcmconferences.co.uk
Hazards Conference (London) — KCM Events and Conferences
Plate Tectonics, Volcanoes, Earthquakes and more: this year's Hazards conferences are set to be the best yet!
054
Reposted by Dave Petley
Heinrich Heinz @hkh621.bsky.social · 15/09/2026
Leafed through the book earlier today at GeoQuebec 2026. It looks fantastic.
041
Dave Petley @davepetley.bsky.social · 15/09/2026
Incredibly helpful updates have been posted online on both the 2026 Nepal-Tibet landslide and the 2023 Teesta Valley GLOF:- eos.org/thelandslide... These are two invaluable pieces of work by Praful Rao of Save The Hills in Darjeeling-Sikkim, India and the Youth Innovation Lab in Nepal.
Before and after image of the 2023 Teesta Valley GLOF, posted to the Save The Hills blog by Praful Rao.
13016
Dave Petley @davepetley.bsky.social · 14/09/2026
A new book, Understanding Landslides Through Case Studies by Serge Leroueil and Luciano Picarelli seeks to report and summarise contemporary knowledge on slope movements and mechanisms. eos.org/thelandslide...
eos.org
Understanding Landslides Through Case Studies
A new book, Understanding Landslides Through Case Studies by Serge Leroueil and Luciano Picarelli, has just been published
0142
Dave Petley @davepetley.bsky.social · 10/09/2026
Baroness Jacqui Smith (Minister of State) addressing the Universities UK annual conference here at NTU.
Jacqueline Smith addressing the UUK conference
000
Dave Petley @davepetley.bsky.social · 10/09/2026
How many people died? Why counting disaster fatalities is harder than it looks. An article first published on PreventionWeb by Lakshman Srikanth and myself. eos.org/thelandslide...
The aftermath of the Kashmir earthquake at Balakot.
053
Dave Petley @davepetley.bsky.social · 07/09/2026
Sufficient satellite & drone imagery is now available to allow initial analysis of the landslide that started the 26 August 2026 debris flow in Nepal & Tibet. eos.org/thelandslide... This was a large failure with catastrophic impacts. But larger, more devastating, events have occurred in Nepal.
Planet Labs image from 28 August 2026 showing the aftermath of the 26 August 2026 landslide in Nepal. Image via Watanave Lab.
02516
Dave Petley @davepetley.bsky.social · 04/09/2026
A thought piece that I have written with Lakshman Srikanth of Deltares on the complexities of estimating the cost of a disaster through counting the number of fatalities:- www.preventionweb.net/drr-communit...
preventionweb.net
How many people died? Why counting disaster fatalities is harder than it looks
Why is counting disaster fatalities harder than it looks? This blog examines how deaths are defined, attributed, verified and revised, and why better fatality data is essential for understanding and r...
051
Dave Petley @davepetley.bsky.social · 03/09/2026
Rumours are now circulating online that the #Nepal #landslide disaster was triggered by a missile fired by China at a dam. This sort of nonsense is so very unhelpful.
1143
Dave Petley @davepetley.bsky.social · 02/09/2026
Nothing better emphasises the quality of authentic donuts than signs made with #AI (in San Diego). #AIslop
Female AI poster for donuts.Male AI poster for donuts.
180
Reposted by Dave Petley
Bethan Davies @iceybethan.bsky.social · 29/08/2026
One other factor to consider is the role of debuttressing - the glacier was formerly much larger but has receded substantially in recent decades, which could be a contributing factor
1122
Reposted by Dave Petley
Science Magazine @science.org · 28/08/2026
Hundreds of scientists around the globe have been working tirelessly to piece together the sequence of events that led to the devastating flood in Tibet and Nepal, which has killed nearly 600 people, left nearly 2000 missing, and destroyed many towns and hydropower plants. scim.ag/3SErvn3
scim.ag
How scientists unraveled the cause of the devastating flood in Tibet and Nepal
Global cooperation revealed a landslide, not a glacial collapse, likely initiated the cascade of events
38840
Reposted by Dave Petley
axamaqueda.bsky.social @axamaqueda.bsky.social · 27/08/2026
May I point at your post from last year about the Rasugawadhi hydropower plant? This site was already flooded by a suspected GLOF. Sadly, this year the glacier collapse was much larger eos.org/thelandslide...
eos.org
The 8 July 2025 catastrophic flood at Rasuwagadhi in Nepal
On 8 July 2025, a catastrophic flood occurred at Rasuwagadhi on the border between Tibet and Nepal. At least 28 people have been killed.
052
Dave Petley @davepetley.bsky.social · 26/08/2026
Some initial thoughts on the catastrophic debris flow in Nepal and Tibet in Nepal and Tibet today:- eos.org/thelandslide... This draws on the initial analysis of @planet.com images by @watershedlab.bsky.social
73926
Reposted by Dave Petley
Melaine Le Roy @subfossilguy.bsky.social · 24/08/2026
Rock avalanche from Grand Dru on 23th Aug. 2026 at 6:57 pm! 🏔🔥 Yet another (bigger one) following the one on 8th Aug. at the same location! 🎥 : Refuge de la Charpoua
13813
Dave Petley @davepetley.bsky.social · 21/08/2026
Gosh! It's been a long time coming. #pusb
030
Dave Petley @davepetley.bsky.social · 20/08/2026
At least 107 people were killed in the 18 August 2026 gold mine landslide at the Zamboye (Zamboï) artisanal mining site in the Central African Republic, on the border with Cameroon. The landslide was caught on a dramatic video. eos.org/thelandslide...
Screenshot of the video of the 18 August 2026 gold mine landslide at the Zamboye (Zamboï) mining site in the Central African Republic.
084
Dave Petley @davepetley.bsky.social · 19/08/2026
The devastatingly critical report of the external review commissioned by Tauranga City Council into the 22 January 2026 Mount Maunganui Beachside Holiday Park landslide in New Zealand, in which six people died:- eos.org/thelandslide...
The 22 January 2026 landslide at Mount Maunganui in New Zealand. Image from the TCC external review.
091
Reposted by Dave Petley
Mark Shore @markshore.bsky.social · 18/08/2026
just imagining if hydroelectric dams were built on the go, as cheaply as possible, using whatever materials were at hand, and with the ultimate height left unspecified
011
Dave Petley @davepetley.bsky.social · 18/08/2026
Images of the aftermath of the 13 August 2026 tailings storage facility failure at the Semancor Dikwena Chrome Mine in South Africa. eos.org/thelandslide...
The aftermath of the TSF failure at the Samancor Dikwena Chrome Mine tailings storage facility near Brits. Image released by the Department of Mineral and Petroleum Resources on social media.
1171
Dave Petley @davepetley.bsky.social · 17/08/2026
The 13 August 2026 tailings storage facility failure at Dikwena Chrome near to Brits in South Africa. eos.org/thelandslide... The image is a still from a video collected by Iaan Myburgh.
The aftermath of the TSF failures at the Samancor Dikwena tailings storage facility near Brits. Still from a video collected by Iaan Myburgh.
0183
Dave Petley @davepetley.bsky.social · 14/08/2026
A new analysis (Reiss et al. 2026) explores a global database of fatal coastal cliff failures, showing that these tragic events most frequently occur in the summer months when beaches are heavily populated. eos.org/thelandslide... Original paper (worth reading):- nhess.copernicus.org/articles/26/...
Monthly number of fatal coastal cliff failure events in the Northern and Southern Hemispheres. From Reiss et al. (2026).
080
Reposted by Dave Petley
Melaine Le Roy @subfossilguy.bsky.social · 12/08/2026
Aiguille du Midi north face today! 1:15 pm Shot from Plan de l'Aiguille. Release area immediately below the ridge 🔥 🎥 Titouan Huige
46035
Dave Petley @davepetley.bsky.social · 12/08/2026
One of the @ntunews.bsky.social Peregrine Falcons was noisily announcing its presence from the top of the Newton Building this morning. The nestcam is here: www.nottinghamshirewildlife.org/peregrine-cam
A Peregrine falcon at NTU on 12 August 2026.
060
Dave Petley @davepetley.bsky.social · 12/08/2026
Satellite imagery by @planet.com highlights how the very largem valley blocking Wanlixi landslide in Taiwan evolved prior to the main failure on 21 June, and how it has continued to move subsequently. eos.org/thelandslide...
Satellite image of the site of the Wanlixi landslide on the day before the failure. Image copyright Planet Labs, used with permission, collected on 20 June 2026.Satellite image of the Wanlixi landslide on the day of the failure. Image copyright Planet Labs, used with permission, collected on 21 June 2026.Satellite image of the Wanlixi landslide on 9 July 2026. Image copyright Planet Labs, used with permission, collected on 9 July 2026.
1173
Dave Petley @davepetley.bsky.social · 11/08/2026
A massive debris flow has struck the Niti Valley Road in Chamoli district, Uttarakhand, India. www.youtube.com/watch?v=MX1W... At first glance, the location might be [30.83494, 79.81507]. Thoughts on what this is are welcome. GLOF? Landslide dam collapse? Channelised debris flow after a landslide?
youtube.com
Niti Valley mein hadsa hua || Niti Valley Road hui band..
YouTube video by Bairagi Life Captured
3152
Dave Petley @davepetley.bsky.social · 11/08/2026
On 4 July 2026, 19 people were killed in a massive debris flow at Cantzama, Ecuador. @planet.com imagery shows that this was caused by a c.1 km long landslide that occurred 13 km upstream of Cantzama. This transitioned into a channelised debris flow that destroyed the town. eos.org/thelandslide...
Planet Labs image of the area upstream of Cantzama in Ecuador, overlain into Google Earth, showing the landslide that triggered the catastrophic debris flow. Image copyright Planet Labs, used with permission, collected on 5 July 2026. Planet Labs image of Cantzama in Ecuador, overlain into Google Earth, showing the aftermath of the landslide. Image copyright Planet Labs, used with permission, collected on 5 July 2026.
1126
Reposted by Dave Petley
Dr Dan Shugar 🇨🇦 @watershedlab.bsky.social · 10/08/2026
1 year ago a giant landslide collapsed into Tracy Arm fjord, triggering the second biggest tsunami ever recorded. @geophysichick.bsky.social @ksvenenvig.bsky.social @seismo-steve.bsky.social @aramfathian.bsky.social @ezgikarasozen.bsky.social @maxvwdv.bsky.social et al Sherlock Holmes'd it. 🧪⚒️
04215
Dave Petley @davepetley.bsky.social · 10/08/2026
In July 2005, over 500 mm of rainfall in a few days triggered numerous landslides and debris flows in Yangshan (the Yang Mountains) in China. eos.org/thelandslide... Before and after satellite images by @planet.com.
Satellite image image of part of the area in Yanghshan, Hebei, China  affected by the July 2026 landslides.  Image copyright Planet Labs, used with permission, collected on 22 June 2025.Satellite image of the aftermath in part of the area in Yanghshan, Hebei, China  affected by the July 2026 landslides.  Image copyright Planet Labs, used with permission, collected on 30 July 2025.
092
Dave Petley @davepetley.bsky.social · 06/08/2026
In July 2026 I recorded 48 fatal landslides causing 413 fatalities. This year continues to be atypical in terms of the temporal pattern of fatal landslides, with the total running very close at this stage to the record-breaking year of 2024. eos.org/thelandslide...
The cumulative total number of global fatal landslides in 2026 by pentad to the end of July.
073
Reposted by Dave Petley
Melaine Le Roy @subfossilguy.bsky.social · 05/08/2026
Absolutely insane footage of rock avalanches currently sweeping across the entire south face of the Matterhorn, as filmed from Cervinia! 🔥😱 📽️ Via @meteovalledosta
115578
Reposted by Dave Petley
Dr. Heather McFarlin @volcanoheather.bsky.social · 05/08/2026
Pleqse share!! Postdoc opportunity for near-real-time landslide detection in Alaska!!! The successful applicant will get to work with the amazing @ezgikarasozen.bsky.social See this page for more info! earthquake.alaska.edu/job-opportun... 🪨⚒️🧪
earthquake.alaska.edu
Job Opportunities | Alaska Earthquake Center
The Earthquake Center’s success is built through the collaboration of people with different specialties. Our team includes scientists, technicians, engineers, communications professionals, IT speciali...
0910
Dave Petley @davepetley.bsky.social · 04/08/2026
The 3 August 2026 landslide at the Debre Metmik Tsadkane Mariam Monastery in Ethiopia, which killed at least 14 worshippers who had gathered for a holy water cleansing ritual. eos.org/thelandslide...
Google Earth image of the Debre Metmik Tsadkane Mariam Monastery.
051
Reposted by Dave Petley
Zane Bruce @iarnulfr.bsky.social · 03/08/2026
Heh. That was a hectic event. I was in the back of the room when the assisting Navy vessels had a press conference in Kaikoura, and I thought, 'which one of these boats has good sonar' and found a crusty old warrant officer and he ended up getting the Canterbury and the Tangaroa onto the mapping
111
Dave Petley @davepetley.bsky.social · 03/08/2026
High resolution bathymetric data has allowed submarine landslides triggered by the 2016 Kaikōura earthquake in New Zealand to be mapped (Gnesko et al. 2026). In total 853 slope failures were identified. eos.org/thelandslide...
eos.org
Submarine landslide inventory for the 2016 Kaikōura earthquake
High resolution bathymetric data has allowed submarine landslides triggered by the 2016 Kaikōura earthquake in New Zealand to be mapped.
1122
Dave Petley @davepetley.bsky.social · 31/07/2026
In #Taiwan, a large rockslide last month, the Wanlixi #landslide, has blocked a river, creating a barrier lake with a volume of about 6 million cubic metres. The dam is being monitored 24 hours per day in case of a breach. eos.org/thelandslide...
Aerial image of the Wanlixi landslide and lake as of 30 July 2026. Image from the Forestry and Nature Conservation Agency, Taiwan,
0174
Dave Petley @davepetley.bsky.social · 30/07/2026
A new study (Acosta-Reyes et al. 2026) provides a fascinating insight into the patterns of landslide exposure in the United States. It shows that the southern Appalachians in particular has a population living in poverty that is highly exposed to landslides. eos.org/thelandslide...
Poverty characteristics of the population exposed to high landslide susceptibility in the United States from Acosta-Reyes et al. (2026).  Original caption: Income and poverty characteristics of the population exposed to high landslide susceptibility at the census-tract scale. (a) ... (b) High-exposure population residing in tracts with poverty rates of 20% or higher. Insets for Alaska and Hawaii use a modified scale and geographic displacement for visual clarity.
0145
Dave Petley @davepetley.bsky.social · 29/07/2026
In June 2026 I recorded 48 fatal landslides causing 131 fatalities. 2026 continues to be atypical in terms of the temporal pattern of fatal landslides. eos.org/thelandslide...
The cumulative total number of global fatal landslides in 2026 by pentad to the end of June.The number of global fatal landslides in 2026 by month to the end of June.
091