👩‍🎓 Ouverture des candidatures PSL #PhD tracks 2026-27 en Sciences de la terre et biodiversité. Ces cursus en 5 ans s'adressent à des étudiants à haut potentiel souhaitant relever les défis scientifiques de demain et préparer, dès le niveau Master, leur projet de recherche. 👉 psl.eu/phd-track-ea...

#Communiqué 🗞️ Une hausse de la température des fluides émis par les sources hydrothermales sous-marines signale l’inflation de la chambre magmatique sous le fond marin et peut annoncer une éruption. 🌋 🌊 👉 www.cnrs.fr/fr/presse/le...

The School de PIs #2 "ECOLπ2" now sails from St John's, arriving at Brest 21st Oct. Onboard l'Atalante F. Lallier (Sorbonne U., Station Biol. Roscoff) & M. Delescluse (ENS de Paris) together w/ 5 young scientists, C. Prigent, M. Bickert, J. Tugend, S. Sambolian & M. Ourgaud, under sunny skies now.

#DeepSeaMining would cause severe impacts in all levels of large marine ecosystems - it`s devastating

🧪⚒️ #NODSSUM cruise - On land, material & samples make their way back to home labs. And this morning we showed sonar images of barrels & photos taken by Ulyx flying at ~10 m above seafloor. Lots to do back in labs & offices. It was intense - good intense. Images: see copyright etc in thread

🧪⚒️ #NODSSUM cruise - Operational update - North East Atlantic zones NEA#3&#4 of radioactive waste dump. UlyX mapped w/sonar 140 km2 (15 dives ), detecting more than 3000 barrels - 26 sites cored for sediment, 19 rosettes for water samples, 8 fishtraps (1 @ bottom, 9 rattails), 1 current meter.

🧪⚒️ #NODSSUM cruise - Sunday w/ pains au chocolat - & 48 h till we leave the work site. Last night no UlyX dive due to weather & coring. The 12-tube Oktopus corer preserves the water - sediment interface, and a critical part to look for radionuclides from barrels or surface fall-out.

🧪⚒️ #NODSSUM cruise - we are into the last week of the cruise. Up to now we have been spared of bad weather. We are now sandwiched in a narrow high pressure corridor w/ calm seas… ans spectacular sunsets & sunrises & moon rivers - but some rocking in the horizon this weekend.

🧪⚒️ #NODSSUM cruise - Operational update - North East Atlantic zones NEA#3 and NEA#4 of radioactive dump. UlyX mapped w/sonar 110 km2 in 7 dives (1 to process ), detecting more than 1900 barrels, 9 sites cored 1 going (sediment), more than 10 rosettes (water samples), & 9 rattails w/fish traps

🧪⚒️ #NODSSUM cruise - on board now the teams are well seasoned and coordinated - operations run smoothly and efficiently all along- with sunshine and calm seas - finally - for the next few days… Update of cruise results/dives/samples to come shortly www.linkedin.com/posts/caroli...

🧪⚒️ #NODSSUM cruise - WOW behind and WOW! Science day: Ulyx came back from a sonar survey at a site visited by AUV Epaulard in 1983 - >600 barrels more (>1800 to date) + a CTD/rosette during the dive, succesful sediment coring, and two fish traps recovered w/ 5 rattails (grenadiers).

🧪⚒️ #NODSSUM cruise - WOW - Wainting on Weather with a multibeam survey and no Ulyx dive yesterday- after 5 days of work at the radioactive waste dump site. After 5 Ulyx dives we now located >1200 barrels in sonar maps, and sediment/water/fish sampling is well on the way… more details later…

🧪⚒️ #NODSSUM cruise - we arrived to the radioactive waste dump site 2 days ago & AUV UlyX is brings up sonar data that will guide our sampling strategy. After checks for radioprotection, sonar data (500 Gb) transfer via the sturdiest hard drive ever - rated 6000m depth in a tinanium bottle.

🧪⚒️ #NODSSUM cruise - the first operations to test sampling of water and sediment, radioprotection protocoles, and the AUV w/ its new sonar are done. Soon off to a reference site w/ depths of more than 4800 m, before the work at the radioactive dump site.

🧪⚒️ #NODSSUM cruise - L’Atalante is now on the way after leaving Brest. First AUV UlyX dive tuesday morning to test all the instruments - and water and sediment sampling to set in place procedures and train the teams.

🧪⚒️ #NODSSUM cruise - the yellow UlyX - the autonomous underwater vehicle or AUV - is onboard this sunny Saturday morning - ready for deep diving & mapping the abyssal plains of the Atlantic. Back deck of l’Atalante now fully occupied also with moorings, corers, rosettes, etc. Almost ready to go.

🧪⚒️ #NODSSUM cruise - L’Atalante @ Brest harbor @ our arrival &some night pics. Empty but loading has begun & will be filled today w/ containers, instruments, the Ulyx autonomous robot, computers… Boarding Sun to set up labs & work spaces. Thanks to all making this possible #DT_INSU #FOF #GENAVIR

🧪⚒️ #NODSSUM cruise - We bring along Marina Zindy’s art works, to be placed on ballast for moorings to be deployed in coming weeks. Permanently installed at the seafloor, we may visit them in a year or two during a follow up cruise. Read about Marina's project here: www.linkedin.com/posts/marina...

🧪⚒️ #NODSSUM cruise - Wind and waves are limiting factors for operations at sea - & thus to gather samples and data. While far ahead, but we begin to keep track of predictions in our working area (~46N 17W 😬) - working from the 20th of June, for about 20 days (check wave height at the flagpole).

🧪⚒️ #NODSSUM cruise - J-10 and cruise preparations move along. Quizz - what is this shipment just received at Clermont Ferrand? Some clues: Not depth-rated 6000 m, ~5.5 kg in air and <0.5 kg in water. Not critical for any specific scientific operation.

🧪⚒️ - PhD position APPLICATIONS OPEN TILL JULY 15th 2025 - based @ U. Lyon (M. Andreani) w/ the participation of ENS Paris - on fluid-rock interactions at ridges. This is part of the FLUXBEATS ITN project (www.fluxbeats.eu) involving 10 PhD programs. observatoire.univ-lyon1.fr/actualites/j...

🧪⚒️ #NODSSUM cruise - less than 4 weeks before departure, the hidden part of sea-going fieldwork: preparation of material... and skills. Logistics, shipping, administrative forms, purchases, instrument training w/ support from #DT_INSU. All has to be onboard when sailing.

🧪⚒️ #NODSSUM cruise, J-27: Onboard N/O L'Atalante, AUV UlyX first science deployment @ NE Atlantic Abyssal Plain to depths of 5500 m, to identify and map radioactive waste barrels @ the seafloor & impacts on ecosystems. CNRS press release (cruise webpage in link) www.cnrs.fr/fr/presse/de...

🧪⚒️ how well do we know the ocean floor? We now have the morphology for ~30% of the seafloor mapped by ships (seabed2030.org). What about visual observations? Dives with rovs, submersibles, towed sand other systems, have inspected <0.001%, about 1500 km2. At best. www.science.org/doi/10.1126/...

Current legal frameworks can’t protect the oceans from deep-sea mining and the negative impacts on humankind …then they need to be changed theconversation.com/current-lega...

🧪⚒️ The New eruption @ the East Pacific Rise after a cycle of melt accumulation & seafloor uplift. Several years of follow up by Thibaut Barreyre (CNRS@GeoOcean) & coPIs will tell how these events build the oceanic crust, 1 eruption @ a time - & comeback of ecosystems www.nytimes.com/2025/05/02/s...

Our Legal Advisor Duncan Currie also warns that the ramifications of this decision could resonate beyond deep-sea mining, affecting agreements on fishing, shipping, navigation and marine research! 📣 It’s time for governments to stand up-for people, for planet, for the ocean. #DefendTheDeep

This is just another step moving away from science-based approaches, and confirming the takeover by the incompetence and corruption of the Trump administration that is dismantling the US science network.

TMC @themetalsco.bsky.social negotiating the shortcut around ISA with Trump - surely environmental aspects will be absolutely not taken into consideration. Surely no tariffs applied to this Canadian company. Greenwashing till now. www.theguardian.com/environment/...

Mining companies, after years pretending science-driven ‘sustainable’ deep-sea mining hope to team up with the Trump administration to circumvent mining regulations and put aside science. It was always about profits & never about the environment. Greenwashing it was. www.nytimes.com/2025/03/27/c...

Deep-sea mining threatens sea life in a way no one is thinking about − by dumping debris into the thriving midwater zone theconversation.com/deep-sea-min...

Bonjour, Connaissez-vous le réseau de profileurs Argo? C'est une clé de voûte de l'observation de l'océan. www.argo-france.fr/Argo-France/... 1/...

🧪⚒️ - New Junior Professor (CPJ) position submarine volcanology at Saclay (FR). Applications opening spring 2025. Contacts: [email protected], [email protected], [email protected].

ROV is in the water and deploying seismometers to measure fluid flow and earthquakes for the @ukri.org @noc.ac.uk HYDROMOX project. Worked with this ROV on my first expedition in 2008. Still find driving around on the seafloor thrilling.

Earthquake activity offshore Santorini, Greece, imaged in high-resolution and processed by Marius Isken in our team at GFZ using github.com/pyrocko/qseek

🧪⚒️ - On the Santorini seismic crisis - here is a page and a presentation (in French) of different aspects of this crisis by @frederiqueleclerc.bsky.social (GeoAzur), Pierre Briole (ENS Paris) and Florent Bringer (ISTERRE). Video in french at the EPOS-France site. www.epos-france.fr/en/blog/2025...

Here is a post on the on-going seismic crisis between Santorini and Amorgos by @judithgeology.bsky.social‬. See also the paper on the 1956 Amorgos Earthquake, by @frederiqueleclerc.bsky.social www.nature.com/articles/s43...

We also recovered and redeployed five hydrophones that were first deployed last year during the #GEODAMS 2024 cruise.

⚒️🧪🌊 25/25 -The #VG2024 leader completed the race after 64j19h22 at 17.8 knots. More than 26700 nm (~51000 km) crossing 4 major mid-ocean ridges (Mid-Atlantic, Southwest, South East & East Pacific Rise) & around Antarctica. Thnks to @jie-chen.bsky.social for the Spilhaus map: doi.org/10.1038/s415...

⚒️🧪🌊 24/n - & the #VG2024 lead is near King's Trough, a failed rift formed perpendicular to the ridge axis 40 to 25 Myrs ago, now fossilised. First named by Laughton in '65 and described in detail by Matthews et al. in '69, the rift is a few km deep, and reaches 6000 m bsl @ Keep Deep to the East.

⚒️🧪🌊 23/n - The #VG2024 sailed over Great Meteor Guyot - part of a set of hotspot seamounts formed 20 to Myrs ago, possibly linked to the Azores hotspot to the N. The Guyot is flat topped due to wave erosion & later subsidence. It was 1st mapped & named during the N Atlantic Meteor cruise in 1937.

113 years ago today (Jan 6, 1912), Afred Wegener gave a talk at the German Geological Society, describing his model of Continental Drift. Wegener’s model was based on geologic evidence, and it mirrored ideas presented by others about continental fit.

⚒️🧪🌊 - Following up on bsky.app/profile/etha..., here is Chat GPT and Grok's view of a mid ocean ridge system... with clearly distinct visual identities. Chat GTP visually beats Grok. Content-wise... 🤣.

⚒️🧪🌊 21/n - The #VG2024 tracks N the S-wards path from a month ago, over the Equatorial Atlantic (posts 3-6). Here most transform zones link continental margins & the ridge axis, peristing tens of millions of years. Others form & disappear, transition to oblique offsets that migrate over time.

⚒️🧪🌊 20/n - #VG2024 sailing NE along the Brazilian coast, soon xssing the tracks of the start of VG2024. And sailing by the Vitoria Trinidad seamount chain, the track of the Trinidade hotspot. Volcanism is ~40 My near the coast, and at <500 kyrs at the Martin Vaz & Trinidad Islands to the East.

⚒️🧪🌊 19/n - #VG2024 lead sailed NE across South Atlantic abyssal plain of the Argentinian Basin, & approaching the Rio Grande Rise - a volcanic Plateau formed ~80-90 million years ago near the ridge axis, by the Tristan-Gough hotspot. W/ a shallow point @ ~160 m, it was probably emerged in the past.

Axial seamount, off the Oregon coast, is getting ready to erupt (again) in 2025. The most well instrumented under sea volcano has reached similar inflation as when it erupted (as predicted at that time) in 2015. Real time data is online for anyone to see! ⚒️🧪🌋 www.sciencenews.org/article/scie...

⚒️🧪🌊 18/n - #VG2024 crossing the Drake passage - sailing over the Scotia Plate that preserves now inactive mid-ocean ridges (Phoenix & W Scotia), and a back-arc system (East Scotia), w/ some inactive transform faults - A system of small microplates between the Antarctic and Atlantic Plates.

⚒️🧪🌊 17/n - #VG2024 lead crossed the Pacifc-Antarctic Ridge, south of the Nemo Point - farthest from land, some 2700 km from the nearest shore - & unmapped. The Fracture Zones here dissecting the ridge are named after some of the pioneers of marine geology - including Marie Tharp and Bruce Heezen.

⚒️🧪🌊 How faults form @ the axis of mid-ocean ridges? Do fault parameters link to spreading rate, magma supply, volcanism? @jie-chen.bsky.social analyses high resolution bathymetry from deep-sea surveys, exploring temporal & spatial scales impacting fault growth: authors.elsevier.com/c/1kFYK_,1tQ...