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Prof Sebastian Geiger

@geoenergyprof.bsky.social
366 followers 252 following 116 posts

Professor for Sustainable Geoenergy at TU Delft and passionate 🇪🇺, conducting #research in #geoenergy, #geoscience, & #energytransition (views are my own)

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Reposted by Prof Sebastian Geiger
tudelftceg.bsky.social @tudelftceg.bsky.social · 01/07/2025
High temperatures today and we’ve already had a long period of drought. Drinking water always seemed completely self-evident in NL. But it’s not. Although the Dutch focus has traditionally been on how to keep water out, we need to focus more on storing water. 👉 www.tudelft.nl/en/stories/a...
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 26/06/2025
In times when funding becomes increasingly challenging and restrictive, this investment from Energi Simulation is a real difference maker for many PhDs and postdocs working in the field of #geoscience for the ##energytransition at our department at TU Delft www.tudelft.nl/en/2025/citg...
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Energi Simulation continues geoenergy partnership with Delft University
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 03/06/2025
At this year's #EAGEAnnual2025 my colleague Anne gave a truly passionate and compassionate pitch why #geoscience #education needs to become more inclusive and diverse if we are serious about inspiring new talents to enter this field and work on the #energytransition @rockdeftud.bsky.social ⚒️💡🔋
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Henning @geohenning.bsky.social · 18/05/2025
On May 18, 1980, Richard Lasher got up early to get some photos at Spirit Lake. Instead, he was forced to stop because of the massive, explosive Mount St. Helens eruption and captured this iconic photo with his own red Ford Pinto on the road. 🧪⚒️ #OTD www.hemmings.com/stories/mt-s...
Photo by Richard Lasher. Horizontal and vintage photo of a road in a mountain forest. Red car with a motorbike on the road. In the distance a huge ash cloud from the eruption of Mt St. Helens on May 18th, 1980.
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RockDefTUD @rockdeftud.bsky.social · 07/05/2025
PhD Jesse came by in the afternoon and made my day with these freshly cored heterogeneous #Rotliegend #sandstone samples for #CrossScale w/ @geoenergyprof.bsky.social Aren't they pretty? Next: cutting them (and deciding where...), CT scan, porosimetry and then... Break them! 😎😎 #breakingrocks #rocks
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 06/05/2025
Together with colleagues from @imperialcollegeldn.bsky.social we have tried to bring some clarity into the concept of capillary pinning during #CCS, considering the scales and heterogeneity in #geology www.sciencedirect.com/science/arti...
A conceptual picture showing how CO2 injected into a saline aquifer is being trapped across different scales - from pore- to reservoir-scale - due to capillary forces and barriers in capillary pressure, arising from geological heterogeneities at these scales.
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TU Delta @tudelta.bsky.social · 17/04/2025
Harvard University @harvard.edu weigert op de eisen van president Trump in te gaan en zet 2,2 miljard dollar aan overheidsgeld op het spel. De universiteit is niet van plan haar “onafhankelijkheid op te geven”.
delta.tudelft.nl
Harvard zwicht niet voor Donald Trump - Delta
Harvard University weigert op de eisen van president Trump in te gaan en zet 2,2 miljard dollar aan overheidsgeld op het spel. De universiteit is niet van
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RockDefTUD @rockdeftud.bsky.social · 15/04/2025
Proud of our postdoc Milady Naderloo rocking his #DeepNL plenary presentation, arguing the lessons learnt from #InducedSeismicity should not go to waste in #energytransition related scenarios
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TU Delta @tudelta.bsky.social · 14/04/2025
De voorgenomen sluiting van de VU-afdeling aardwetenschappen is desastreus voor het geowetenschappelijk onderzoek en onderwijs. Dat schrijven TU-hoogleraren Timo Heimovaara en @geoenergyprof.bsky.social namens hun afdeling geosciences and engineering in deze solidariteitsverklaring.
delta.tudelft.nl
‘Sluiting aardwetenschappen aan VU is precies de verkeerde boodschap’ - Delta
De voorgenomen sluiting van de VU-afdeling aardwetenschappen is desastreus voor het geowetenschappelijk onderzoek en onderwijs. Dat schrijven TU-hoogleraren Timo Heimovaara en Sebastian Geiger namens ...
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 14/04/2025
Our open-ed statement in @tudelta.bsky.social, expressing solidarity with our colleagues and their students at the Vrije Universiteit of Amsterdam: delta.tudelft.nl/en/article/c... #geoscience #academia #science
delta.tudelft.nl
‘Closing VU earth sciences sends exactly the wrong message’ - Delta
The planned closure of the VU Department of Earth Sciences is disastrous for geoscience research and education. That is what TU Delft professors Timo Heimovaara and Sebastian Geiger write in this soli...
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RockDefTUD @rockdeftud.bsky.social · 10/04/2025
#GirlsDay today! On behalf of our Faculty @tudelftceg.bsky.social. We talked about earthquakes, geology & geothermal energy. We used straws to drill geologically layered clay, jumped and registered the "seismic wave" with @phyphox.org and of course we broke a rock! #breakingrocks #rocks 🤓😎
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 10/04/2025
A statement of solidarity with our colleagues and their students from the Department of Earth Sciences at the Vrije Universiteit Amsterdam #geoscience #academia #science #earthscience #climatechange #energytransition ⚒️🧪🧬💡🔌
The Vrije Universiteit of Amsterdam (VU) announced the decision to close its earth sciences department & cut 42 jobs as part of a wider measure to save €60M. The BSc degree in earth sciences will be discontinued.
We want to express our solidarity with our colleagues & the students at the VU, as well as their families, who face unprecedented uncertainties about their future. Our thoughts are with them.
These cuts are not only devastating for the affected staff & students. They will have major consequences for geoscience research & teaching in the Netherlands & beyond. Geoscience in the Netherlands is highly respected around the world by industry & academia alike. This respect is firmly grounded in the collaborative, complementary & internationalised approach to research & teaching across the Netherlands.
Losing a crucial part of the Dutch geoscience knowledge base at the VU will weaken the international standing of the Netherlands in the broader field of earth & geosciences, not only putting innovation at risk in a time where we can ill-afford this, but also reducing the number of urgently needed graduates. 
Geosciences underpin many of the solutions that we need to tackle some of the most severe challenges humanity faces: combating climate change, access to clean water, energy security & energy transition, sustainable sourcing of critical raw materials, understanding the impact of environmental change, or mitigating the risks of natural hazards. 
While we can debate how we can better communicate the importance of geosciences to increase student numbers, closing the earth science department at the VU sends the wrong message: that geosciences are expendable, at a time when they are needed more than ever. 
Only through cooperation & solidarity, not only in the field of geosciences & not only in the Netherlands, universities will be able to push back against government cuts & anti-science politics that threaten to inflict potentially devastating damages to our society.
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 09/04/2025
Another excellent and insightful summary on the #netzero benefits (including the financial benefits) in the UK by @drsimevans.carbonbrief.org from @carbonbrief.org 🔽
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 05/04/2025
A beautiful and passionate inaugural lecture by our colleague Hadi Hajibeygi ⬇️
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RockDefTUD @rockdeftud.bsky.social · 03/04/2025
Amidst all terrible news, I am sad that here it is not better. Today the VU Amsterdam announced they'll cut Earth Sciences, and fire 39 staff. 130 students are left to figure out how to finish, and an unknown number of PhDs lose their supervisors. My heart goes out to my colleagues 😳😥
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 27/03/2025
Spring is in the air at TU Delft ☀️🌼🌸🌻
A cycling path at TU Delft's campus flanked by blossoming trees and beneath a clear blue sky at which the sun is starting to set, indicating that spring isthr corner just aeo
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 25/03/2025
Me too 🔽
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RockDefTUD @rockdeftud.bsky.social · 21/03/2025
Here's Jesse and Parvin taking a moment before the conference starts to check out the flowers! The right season to come visit us is starting 🥰 from now until mid-May the flower fields are blooming. Always good to take a moment with nature to recharge ☀️🌷
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David Ho @davidho.bsky.social · 21/03/2025
RIP academic freedom. This is a very sad day for academia in America.
wsj.com
Columbia Yields to Trump in Battle Over Federal Funding
Columbia’s agreement is a significant moment in the intensifying battle between Trump and elite universities.
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Geology of the Tour de France @geotdf.bsky.social · 20/03/2025
For those of you who are Tired Of All This Shit, we bring you: The relationship between volcanism and the invention of the bicycle! We made this clip, with @vanhinsbergen.bsky.social, for last year's Tour de France stage over the Cantal Volcano, and its highest remaining peak, Puy Mary ❤️🤠
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RockDefTUD @rockdeftud.bsky.social · 17/03/2025
Campus is starting to blossom! Thanks to a bike detour I ran into the first trees bursting into full song this morning
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RockDefTUD @rockdeftud.bsky.social · 13/03/2025
First trip after maternity leave for Anne, together with @entelakane.bsky.social, Annemarie and Ilshat we visit the Geothermal Alliance Bavaria in Munich, with a special site visit to a local #geothermal plants 😁😁
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Jan Rosenow @janrosenow.bsky.social · 06/03/2025
This is a great illustration of what the new energy order looks like: ➡️ large to small ➡️ centralised to decentralised ➡️ large grids to microgrids ➡️ one-directional to bi-directional ➡️ passive consumers to active prosumers Of course simplified & highly stylised but it shows the direction of travel.
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Mark Gongloff @markgongloff.bsky.social · 05/03/2025
Stunning new visualization of global temperatures since 1940, from @hausfath.bsky.social www.theclimatebrink.com/p/visualizin...
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 05/03/2025
🚨Another new #openaccess papers discussing the connection between multi-scale #geology and fluid flow for low-carbon #energy applications such as #CCS and #geothermal. Once again very enjoyable research with colleagues and friends from Imperial College London www.lyellcollection.org/doi/full/10....
lyellcollection.org
Impact of Sedimentological Heterogeneity on Subsurface Storage in Net-Transgressive, Shallow-Marine Sandstones: Cliff House Sandstone, New Mexico, USA | Geoenergy
Net-transgressive, shallow-marine sandstone reservoirs overlain by thick mudstone seals are prime candidates for storage of CO2, H2 and thermal energy. Although these reservoirs have high net-to-gross...
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Nature Ecology & Evolution @natecoevo.nature.com · 03/03/2025
In our latest Editorial we discuss the continuing damage being done to US science, and its impact on researchers and the environment 👇 Deep cuts: www.nature.com/articles/s41...
Screenshot of text from a Nature Ecology & Evolution Editorial entitled "Deep cuts"
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 03/03/2025
As one of the signatories of the brilliant open letter by @scurry.bsky.social I am dismayed by this decision, but sadly also not entirely surprised. If we don't stand up for our values and science in this day and age, especially if we're privileged to do so, when then?
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RockDefTUD @rockdeftud.bsky.social · 03/03/2025
Any lab can only be so good as their technicians... Last week our rock saw broke down. Today our invaluable technician Marc is fixing it so probably tomorrow it is already working again. Our MScs, PhDs and postdocs are not much delayed. Yay for Marc! (And the rest of our awesome tech team!)
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 03/03/2025
At the non-for-profit journal Geoenergy we have a number of paper calls for our thematic issues on #geothermal, #CCS, siting for offshore windfarms, #geology for the #energytransition by early career researchers, etc. See www.lyellcollection.org/geoenergy/th...
lyellcollection.org
Geoenergy thematic collections
Geoenergy focuses on the publications of timely and topical research in subsurface geoscience, critical for this new era of sustainable energy. Geoenergy continues the mission of its sister journal P...
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Stephen Curry @scurry.bsky.social · 03/03/2025
I will close the letter for signatures at 17:00 today (UK time). Last chance to voice your support before this evening's meeting of the Royal Society.
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 03/03/2025
🚨New #openaccess paper: Jointly with colleagues from Imperial College London & University of Calgary we are answering the question at which scale we can average properties of the Bunter Sandstone, a key target for #geothermal energy & #CCS in Europe #geology #energytransition doi.org/10.1016/j.ad...
A figure panel consisting of 5 rows and three columns. The first column shows images of core samples from the Bunter Sandstone formation. The second column shows typical geological structures observed at the scale of a few metres in outcrop analogues that correspond to the core data. The last column shows conceptual geological models that captures the heterogeneities observed at the different scales, i.e. core- and outcrop scale.
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AGU (American Geophysical Union) @agu.org · 27/02/2025
AGU has issued a statement urging the Trump administration to renew a federal commitment to climate science. “Climate change is real. It is happening,” said AGU President Brandon Jones. “Climate science is real. It is necessary.” Read more: buff.ly/41zTkyC
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 20/02/2025
Our colleagues and friends from Electricite Strasbourg are busy promoting the FindHeat research project, funded by Hoirzon Europe, at the Geotherm Conference & Expo. FindHeat develops new tools and workflows to accelerate and de-risk geothermal exploration and appraisal. #geology #energysky
Four geothermal scientists, two men, two female, holding posters of the FindHeat research project in front of the Geotherm Conference and Expo sign
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 19/02/2025
A great start to the new week as we could welcome #PhD candidates Valeria Nogales and Hester Claridge, who will both work on #geothermal exploration, and #postdoc Dr Taka Shinohara, who will work on #CCS, to the team! #academicsky #geology
media.tenor.com
a group of minions are standing next to each other with the words welcome to the club
Alt: a group of minions are standing next to each other with the words welcome to the club
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RockDefTUD @rockdeftud.bsky.social · 19/02/2025
I thoroughly enjoyed this student-led multi-disciplinary symposium "under pressure". Personal highlight from @kornelis.bsky.social: no matter which path we take for the #energytransition, a sustainable use of the subsurface will play a critical role. So please come #study with us!
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 18/02/2025
Some truly excellent talks on energy transition, critical raw materials, climate change & water resources - and a much needed positive message on #CO2 emissions from @kornelis.bsky.social at the half-Lustrum event that our #geoscience & #mining student association at TU Delft hosted today.
A TU Delft Professor giving a lecture that explains why there is hope for reducing CO2 emissions even in 2925.
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Stephen Curry @scurry.bsky.social · 13/02/2025
My open letter and FRS resignations reported in Nature: www.nature.com/articles/d41...
nature.com
Royal Society will meet amid campaign to revoke Elon Musk’s fellowship
More than 1,300 scientists have signed a letter calling on the world’s oldest science society to reassess the billionaire’s membership following cuts to US science.
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 11/02/2025
This is an excellent letter from @scurry.bsky.social. There is little we can do as individuals, but I think it is crucial that we are holding our professional societies to account and stand up for our values, especially in this day and age.
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Lyssa Freese @lfreese.bsky.social · 11/02/2025
For all those in the midst of faculty hiring in the geosciences (or planning a hire in the coming months/year), check out our new paper led by Margaret Duffy on factors influencing underrepresented geoscientists decisions to accept or decline faculty job offers www.nature.com/articles/s43...
nature.com
Factors influencing underrepresented geoscientists' decisions to accept or decline faculty job offers in the US - Communications Earth & Environment
Geoscientists from underrepresented groups experienced unwelcoming hiring practices that influenced their decision, according to a qualitative analysis of interviews with 19 candidates who declined a ...
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European Research Council (ERC) @erc.europa.eu · 07/02/2025
Hello, Bluesky! ☀️ We fund frontier research in Europe—bold ideas, unexpected discoveries and science that shapes the future. So it’s only fitting we’ve landed here. Sorry for being late. Follow us for updates on ERC funding, research policy, and our grantees' discoveries.
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 05/02/2025
More #geology field work impressions from the CrossScale team (can you spot the drone?), and more samples being collected to be analysed in the lab together with @rockdeftud.bsky.social ⚒️
Two geologists taking notes in sandstone quarry on a sunny winter day, with another geologist in the background. Drone shot of two geologists in a sandstone quarry, looking upwards at the drone. A geologist taking a photograph of a freshly cut sandstone quarry wall on a clear winter day with blue skiesA geologist measuring the strike and dip of sedimentary structures in a sandstone outcrop
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 04/02/2025
Some stunning pictures from the CrossScale team's fieldwork in Germany, studying types and scales of heterogeneities in the Rotliegend, a major formation targeted for #geothermal energy and #CCS in Europe. Looking forward to working with @rockdeftud.bsky.social to analyse the samples! ⚒️
Outcrop of a sandstone, showing bright-red colours in the evening sun with a blue sky in the backgroundThree geologists standing in front of an outcrop and overlooking a valley in the evening sun with blue skies all aroundOutcrop of a sandstone, showing different sedimentary structures. The outcrop is bright-red colouredTwo geologists in front of an outcrop of a sandstone, showing bright-red colours in the evening sun with a blue sky in the background
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RockDefTUD @rockdeftud.bsky.social · 04/02/2025
The field team will bring a Rotliegend present 😍 #CrossScale @geoenergyprof.bsky.social
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RockDefTUD @rockdeftud.bsky.social · 03/02/2025
Last week was quiet here since I was home with the flu... I'll come back to work tomorrow. Meanwhile, our #CrossScale PhD students have chosen the only sunny week in months for their west Germany fieldwork! 🤩 Motivating photos they send us, don't you think so @geoenergyprof.bsky.social ?
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Jan Rosenow @janrosenow.bsky.social · 28/01/2025
Which power generation technologies are the least harmful to the environment & society? It's wind, solar and geothermal. Great meta-study provides an overview of negative externalities associated with electricity supply. www.sciencedirect.com/science/arti...
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 22/01/2025
Reminds me of my MSc studies in Oregon in the late 1990ties 🤩
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 22/01/2025
Definitely a thought-provoking play, followed by a well-managed interactive session to reflect on your own behaviours when it comes to social and psychological safety.
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 21/01/2025
A great #PhD vacancy in #geology and #geoscience with a brilliant team at TU Delft ⚒️
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Prof Sebastian Geiger @geoenergyprof.bsky.social · 21/01/2025
A bit foggy to date on campus... 🌫️
A picture of very dense fog on the campus of TU Delft
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RockDefTUD @rockdeftud.bsky.social · 20/01/2025
Everything gets better with a hat. Also a block of fractured rock salt 😎 happy Monday all!
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