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Robin Lacassin

@rlacassin.bsky.social
3.2K followers 131 following 743 posts

Institut de Physique du Globe de Paris (IPGP - CNRS). Geology, tectonics, earthquakes, hazard epistemology & com. ⚒️ 🧪 Also: @RobinLacassin@qoto.org www.ipgp.fr/~lacassin/RL-Tectonique… tectoldies.mystrikingly.com

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Dr. Serge Zaka @sergezaka.bsky.social · 3h
Une alerte météorologique "extrême", pour reprendre le terme du message FR-Alert reçu sur les téléphones pour toute la population, est en cours dans le Gard et l'Hérault. Les dernières prévisions sont terrifiantes entre 300 et 400mm de pluie en villes. La population est invitée à se confiner.
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Yann Klinger @yklinger.bsky.social · 23/09/2026
In case any one doubts that geomorphology and paleoseismology are unrelated. Trenching the Fuyun fault now.
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Robin Lacassin @rlacassin.bsky.social · 26/09/2026
Marche pour le #climat à #Fontainebleau
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Tektonika DOAJ @wearetektonika.bsky.social · 23/09/2026
🔔 🆕 A second FIELD GUIDE PAPER is published in Tektonika #DOAJ ! It's about the High Arctic Large Igneous Province #HALIP. K. Senger et al. "A Field Guide to the High Arctic Large Igneous Province In and Around Isfjorden #Svalbard" #tectonics ⚒️ tektonika.online/index.php/ho...
3D representation of igneous complex with location of the different stops described in the field guide.
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Robin Lacassin @rlacassin.bsky.social · 22/09/2026
A story reminiscent of L' #Aquila case 👇 It's about the 2017 rock avalanche at Piz Cengalo that triggered a massive debris flow, killing 8 and damaging part of the village of Bondo (SE Switzerland). ⚒️ www.science.org/content/arti...
science.org
Swiss trial for 2017 avalanche deaths unsettles hazard researchers
Geologist and officials were acquitted last week, but scientists fear future liability for failing to predict similar disasters
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Dr. Serge Zaka @sergezaka.bsky.social · 18/09/2026
Tous les facteurs d'une crise agricole majeure sont en train de se conjuguer.
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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
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Valérie Masson-Delmotte @valmasdel.bsky.social · 27/08/2026
La catastrophe au Népal a été induite par un effondrement de glacier du Langtang Lirung, à une altitude d'environ 5200 mètres. Que sait-on du lien avec le réchauffement climatique dû aux activités humaines pour les glaciers de ce secteur ? 1/...
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Robin Lacassin @rlacassin.bsky.social · 27/08/2026
Excellent article in @theguardian.com about the catastrophic glacial collapse and flash flood in Tibet and Nepal. www.theguardian.com/world/2026/a...
theguardian.com
How the deadly Nepal and Tibet flash flood unfolded – a visual guide
US Geological Survey says massive glacial collapse caused catastrophic flash floods in the Himalayan border region of Nepal ⁠and Tibet
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Stephen Hicks @seismo-steve.bsky.social · 27/08/2026
Dreadful scenes from the devastating Rasuwa flood in Nepal/Tibet. My heart goes out to everyone affected. It likely began with a glacier collapse / rock–ice avalanche recorded by seismometers worldwide. I hope real-time seismic monitoring can support early warning for communities downstream.
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Dr. Wendy Bohon @drwendyrocks.bsky.social · 26/08/2026
Some early reports said that the horrifying flooding in Nepal was the result of an earthquake. However, the signal was actually the recording of the landslide. TL:DR - there was no earthquake, it was a landslide. earthquake.usgs.gov/earthquakes/...
Screen shot showing the USGS event page. The landslide released the same amount of energy as a M5.2 earthquake
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Henning @geohenning.bsky.social · 13/08/2026
A new video emerged which seems to show a surface rupture in Yatsushiro, Japan following the M6.8 earthquake in July! Exact location of the video would be 32°30'04.0"N 130°38'29.9"E. Absolutely wild. Only the second ever video of a surface rupture forming after the 2025 Myanmar video! ⚒️🧪 #geology
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Robin Lacassin @rlacassin.bsky.social · 28/07/2026
An #earthquake of magnitude 6.8 happened close to Kumamoto in the island of Kyushu (SW Japan). Japan is prone to frequent subduction earthquakes, but in this case, the shallow hypocenter depth and strike-slip mechanism imply a rupture in the upper plate. ⚒️ 🧪
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Prof. Stefan Rahmstorf @rahmstorf.bsky.social · 25/07/2026
Yesterday afternoon 14:09 in Lacanau Océan in France. A pale red sun through the smoke tinged everything in Mars style orange. Welcome in the climate emergency! Despite all denial of the fossil fuel lobby, it’s scientific fact: CO2 emissions heat up Earth & make fires worse. 🔥🔥🔥
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Francois Jobard @francoisjobard.bsky.social · 24/07/2026
Lacanau Océan 24 juillet 2026.🔥🆘 L’augmentation des températures globales due à la combustion d'énergies fossiles rend plus intense/probable l'asséchement de la végétation (y compris à pluviométrie annuelle constante), nourrissant ensuite des incendies XXL.
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Robin Lacassin @rlacassin.bsky.social · 27/07/2026
Dystopia in action 👇 We are in #climate emergency.
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Robin Lacassin @rlacassin.bsky.social · 21/07/2026
The areas affected by the #Fontainebleau forest #wildfires (3 Pignons and Faisanderie fires) are highly visible – in dark brown and red – on the Sentinel-2 satellite image @esa.int @copernicusland.bsky.social from July 20, 2026 👇. Over 10% of the Fontainebleau forest has been burned. ⚒️ 🧪
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Robin Lacassin @rlacassin.bsky.social · 21/07/2026
Les zones affectées par les #incendies de la forêt de #Fontainebleau (feux des 3 Pignons et de la Faisanderie) sont très visibles – en brun et rouge sombre – sur l'image satellitaire Sentinel2 (@esa.int @copernicusland.bsky.social) du 20 Juillet 2026. ⚒️ 🧪
Image satellite sur laquelle les zones brulées apparaissent en brun et rouge. Le reste de la forêt de Fontainebleau est en vert vif. Les villes de Melun, Fontainebleau et Nemours sont situées sur l'image. Le cours sinueux de la Seine est très visible aussi.
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Robin Lacassin @rlacassin.bsky.social · 14/07/2026
The 3 Pignons #wildfire, west of #Fontainebleau, as seen by Sentinel 2 (SWIR composition). Burnt and burning areas in brown and orange. We are in a #climate emergency. Combination of severe #drought and #heatwave. ⚒️ 🧪
Satellite image from the Sentinel satellite
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Robin Lacassin @rlacassin.bsky.social · 13/07/2026
La forêt de #Fontainebleau brûle. L’ #incendie aux 3 Pignons (ouest de Fontainebleau) a produit un panache de fumée très visible sur les images satellite hier soir 👇. Nous sommes en #urgenceclimatique, #climat. #Sécheresse extrême et #canicule sur une grande partie de la France.
Image satellite du 12 Juillet au soir montrant le panache de fumées à l'ouest de la forêt de Fontainebleau
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Robin Lacassin @rlacassin.bsky.social · 13/07/2026
The emblematic #Fontainebleau forest is burning. The #wildfire in the 3 Pignons forest (western Fontainebleau) produced a smoke plume clearly visible in satellite imagery yesterday evening 👇. I'm leaving there 😢 We are in a #climate emergency. Severe #drought and #heatwave over most of France. ⚒️ 🧪
Map from weather satellite showing the plume of smoke south of Paris. The shadow of the plume is also visible.
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Robin Lacassin @rlacassin.bsky.social · 30/06/2026
Un collectif d’universitaires s’inquiète de la mise au pas idéologique et de l’asphyxie budgétaire qui menacent le monde de la recherche scientifique aux Etats-Unis, mais aussi en Europe. www.lemonde.fr/idees/articl...
lemonde.fr
« Le technosolutionnisme évince le débat démocratique et l’action politique »
TRIBUNE. Un collectif d’universitaires s’inquiète, dans une tribune au « Monde », de la mise au pas idéologique et de l’asphyxie budgétaire qui menacent le monde de la recherche scientifique aux Etats...
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Robin Lacassin @rlacassin.bsky.social · 30/06/2026
"AI might make it easier to do science while, at the same time, narrowing the questions and styles of reasoning that are collectively pursued." 🧪 www.nature.com/articles/d41...
nature.com
Will AI spark a scientific renaissance — or a diffuse monoculture?
Artificial intelligence’s ability to enrich science will depend not only on model capability, but also on whether researchers, reviewers and funders reward originality over speed.
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Dr. Judith Hubbard @judithgeology.bsky.social · 26/06/2026
What have we learned about the deadly Venezuela earthquake in the last day and a half? A lot, actually. earthquakeinsights.substack.com/p/early-scie...
earthquakeinsights.substack.com
Early scientific picture of the deadly Venezuela earthquake emerges
Eastward rupture from the Boconó fault onto the San Sebastián fault
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Gareth Funning @gfun.earth · 25/06/2026
Composite plot of the two coseismic interferograms (Sentinel-1, from Copernicus) with the USGS epicenters of the two earthquakes and faults from GEM. The shoreline San Sebastián fault lines up with the fringes in the west and is probably the fault responsible.
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Dr. Judith Hubbard @judithgeology.bsky.social · 25/06/2026
⚒️ 🧪 A catastrophic earthquake just struck northern Venezuela. Large buildings have collapsed, and the USGS PAGER is forecasting thousands of fatalities. Our colleague in Caracas, Dr. Frank Audemard, has shared with us what the earthquake felt like and footage from the region. Here’s what we know.
earthquakeinsights.substack.com
Catastrophic M7.5 earthquake strikes northern Venezuela
Severe damage; collapsed buildings; significant fatalities possible
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Robin Lacassin @rlacassin.bsky.social · 25/06/2026
Geoscope @ipgp.bsky.social modeled the #Venezuela doublet as a single #earthquake with a long complex source time function 👇 with magnitude Mw 7.8, quite large. Together with other prelim. seismological analyses (thread below) it suggests a ~200km long rupture on the E-W El Pilar Fault. ⚒️ 🧪 - 1/n
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Robin Lacassin @rlacassin.bsky.social · 23/06/2026
Extreme Heat event cancelled because of extreme heat 🤐
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Météo-France @meteofrance.com · 23/06/2026
🌡️ Les températures continuent d'atteindre un niveau de chaleur exceptionnel. Mercredi et jeudi, les maximales grimpent toujours à plus de 40 °C... De nombreux départements restent en Vigilance canicule. Soyez prudents ! Point météo : meteofrance.com/actualites-e...
Episode caniculaire sur l'HexagoneEpisode caniculaire sur l'HexagoneEpisode caniculaire sur l'Hexagone
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Robin Lacassin @rlacassin.bsky.social · 23/06/2026
Today France recorded temperatures equivalent to those in the Sahara desert. Look to the zones in light pink on the map below (from @infoclimat.fr) ! Terrible #heatwave. We are in a #climate emergency and this is the result of decades of political inaction and big oil denialism. 1/3
Map of western Europe and north-west Africa, with colours showing the temperatures. France and the Sahara desert are in light pink, corresponding to extreme temperatures, often abov 40 degrees celsius.
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Météo-France @meteofrance.com · 21/06/2026
🔴🟠Les températures montent encore d’un cran à partir d’aujourd’hui pour atteindre un “plateau” très élevé au moins jusqu’à jeudi. De nombreux départements sont en Vigilance canicule rouge ou orange. Le point complet 👉 meteofrance.com/actualites-e...
Lundi 22 juin sera encore plus chaud que dimanche, avec des températures maximales atteignant 38 à 40 °C sur l’Île-de-France, l’ouest de la Bretagne et la vallée du Rhône et 40 à 42 °C du nord aquitain à la Touraine et l'Anjou. 

la température moyenne sur l’Hexagone (indicateur thermique) pourrait atteindre le niveau de la journée la plus chaude jamais mesurée en France tous mois confondus. On ne prévoit pas de changement dans les jours suivants, avec un plateau entre lundi et jeudi et un maintien des températures maximales et minimales à un niveau extrêmement élevé. Une baisse s’amorcerait à partir du vendredi 26 juin, mais cela reste à confirmer.On ne prévoit pas de changement dans les jours suivants, avec un plateau entre lundi et jeudi et un maintien des températures maximales et minimales à un niveau extrêmement élevé. Une baisse s’amorcerait à partir du vendredi 26 juin, mais cela reste à confirmer.
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Nahel Belgherze @wxnb.bsky.social · 20/06/2026
France will be at the epicenter of the most significant heat anomaly on the planet over the next few days. The sheer extent of the country that could experience temperatures above 40°C is nothing short of astonishing.
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Robin Lacassin @rlacassin.bsky.social · 21/06/2026
Can you see the anomaly 👇 ? On temperature forecasts for Tuesday France has same colour than the belt of deserts in Africa and Arabia. Not normal. We are in a #climate emergency. And our politics are denying or minimising the problem because "it's the economy, stupid", to enrich the rich ☠️
A map of the Earth showing eastern hemisphere. Colours corresponding to extreme temperatures, 40°C and over, cover all desert areas in Africa and Arabia plus France and Spain
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Anthony Lomax @alomaxnet.bsky.social · 21/06/2026
40-42°C is 104-108°F. Like at the Grand Canyon www.theguardian.com/us-news/2026... But the buildings in France suck for such temperature - too much concrete, too little shade & insulation, wrong orientation of windowed facades. Ignorance? Or done to maximize sale of nuclear electricity in winter...
theguardian.com
Grand Canyon on ‘extreme heat’ watch, with temperatures set to soar
Temperatures could top 111F on Monday and Tuesday, after several recent deaths in park raise concerns over heat
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Robin Lacassin @rlacassin.bsky.social · 20/06/2026
No comment 😱 👇 (forecasts for next Monday) We are in a #climate emergency.
Map showing extreme temperature on France
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Valérie Masson-Delmotte @valmasdel.bsky.social · 11/06/2026
Une action concertée au niveau international et des efforts de coordination sont indispensables pour garantir la continuité et l'intégrité des observations du climat. Merci de votre attention.
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Valérie Masson-Delmotte @valmasdel.bsky.social · 11/06/2026
Aujourd'hui, nous publions la réactualisation annuelle (depuis le 6ème rapport du GIEC publié en 2021, AR6) des indicateurs clés de l'état du climat planétaire jusqu'en 2025, le travail de 73 scientifiques de 56 institutions et 17 pays : essd.copernicus.org/articles/18/... 1/...
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Tim Dawson @timblor.bsky.social · 12/06/2026
I had the opportunity for a quick tour of the (relatively) new rock mechanics lab at the USGS Moffett Field campus. The work they do to understand earthquake physics at small scale of a block of granite is mind boggling.
Five people in a laboratory standing around a large, flat slab of stone with an array of sensors and wires arranged diagonally across the square slab.
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Dr. Wendy Bohon @drwendyrocks.bsky.social · 08/06/2026
Update on the M7.8 earthquake from PHIVOLCS. www.phivolcs.dost.gov.ph/primer-on-th...
Image from PHIVOLC showing the location of the mainshock and aftershocks, which are mostly scattered to the east
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Dr. Judith Hubbard @judithgeology.bsky.social · 08/06/2026
⚒️ 🧪 A M7.8 earthquake occurred beneath the southern Philippines today; the USGS estimates that 1 million people experienced severe shaking; footage shows collapsed buildings. The earthquake occurred within the east-dipping subducting plate that underlies the island.
earthquakeinsights.substack.com
Deadly M7.8 earthquake rocks southern Philippines
Related to eastward subduction beneath Mindanao
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Tektonika DOAJ @wearetektonika.bsky.social · 05/06/2026
🆕 🔔 🆕 We are delighted to announce the publication of our first FIELD GUIDE PAPER by @rlacassin.bsky.social et al. It's about the 464 BCE Sparta #earthquake in southern Greece and associated active faulting - #DOAJ #tectonics ⚒️ tektonika.online/index.php/ho...
Screenshot of article first page showing the title and authors listFigure from the article. It's a panorama photo showing the Eurotas plain in front of the Taygetus mountain range. The active Sparta fault is at the foot of the range. A group of students is visible in the foreground.
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Robin Lacassin @rlacassin.bsky.social · 07/05/2026
After the remarkable account of the 2023 tsunami and seiche in N Greenland, another astonishing article that resembles a forensic examination 👇. A wide range of analytical methods to study a monster #tsunami within an Alaskan fjord. Fascinating. Kudos @watershedlab.bsky.social and co-authors !
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Rebecca Colesworthy @rcolesworthy.bsky.social · 03/05/2026
AI produces MORE editorial labor, not less. “[To weed out slop] the journal doubled its deputy editors from 6 to 11 & nearly doubled its sr editors from roughly 30 to 60. All of this is volunteer labor, unpaid academics donating time to maintain scientific quality.“ www.forbes.com/sites/johndr...
forbes.com
AI Slop Is Flooding Academic Journals. A Top Journal Measured It
A top management journal measured AI’s impact on submissions and reviews. Submissions rose 42%, writing quality declined and AI reviews proved uninformative to editors.
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Tektonika DOAJ @wearetektonika.bsky.social · 28/04/2026
🆕 🔔 In TEKTONIKA #DOAJ a new article by Marianne Métois @dblmm.bsky.social et al. on slow active deformation in France. ⚒️ "What Can #GNSS Tell About Physical Processes in Slowly Deforming France? Insights From a Community Benchmark Exercise" tektonika.online/index.php/ho...
Screenshot of article first page showing the title and authors list
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Tektonika DOAJ @wearetektonika.bsky.social · 14/04/2026
This 👇 is the concluding figure of the two companion papers by Ménant et al. on the #tectonic slicing events at the #subduction interface. Just published in Tektonika #DOAJ. It shows the temporal evolution of the Hellenic subduction zone since the late Eocene. ⚒️ tektonika.online/index.php/ho...
Figure from the second article by Armel Ménant and collaborators. It shows lithospheric-scale cross-sections that illustrate the temporal evolution of the Hellenic subduction zone since the late Eocene. Four stages are shown, at 35-40 Ma, 25 Ma, 15 Ma, present. They illustrate the successive burial, basal-accretion and exhumation stages of the high pressure low temperature units that constitute the paleo accretionary complex of western Crete
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Observatoire volcanologique du Piton de la Fournaise @ovpf.bsky.social · 10/04/2026
🌋Éruption au Piton de la Fournaise. Prise de vue ce matin, 10 avril. Les coulées de lave restent actuellement localisées en amont des Grandes Pentes. Et l'activité de fontaines de lave est visible depuis le Piton de Bert. ©Clément, Helilagon
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Robin Lacassin @rlacassin.bsky.social · 11/04/2026
Not a cinnamon roll, not a pain aux raisins, but a sweet potato. It’s Saturday, posts are lighter despite news still being heavy…
Photo of a sweet potatoe resembling a roll cake
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Robin Lacassin @rlacassin.bsky.social · 10/04/2026
Interesting story 👇 www.nature.com/articles/d41... A researcher posted two preprints about a fabricated disease, containing numerous red flags indicating it was fake. #LLMs #AI swallowed this and then regurgitated it in their responses.
nature.com
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Robin Lacassin @rlacassin.bsky.social · 09/04/2026
After 2 pauses of a few days (25-28 March - 2-8 April) the eruption at Piton de la Fournaise #volcano resumed on 8 April. Today a new eruptive site opened higher above the main cone in an already fissured zone. ⚒️ Follow @ovpf.bsky.social for updated news
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Tektonika DOAJ @wearetektonika.bsky.social · 08/04/2026
We'll publish soon our first Field Guide paper, now accepted for publication. Stay tuned. ⚒️ Send yours if it's in our scope, i.e. #tectonics. It will be carefully peer reviewed, and, if accepted, published without cost and #open-access. Support free to publish / free to read #DOAJ !
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