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Jacek Szczygieł @speleojacek.bsky.social · 29/09/2026

From a grain of sand to the history of glaciations. Proud to see our paper featured on the cover of Geology! Even prouder of my PhD student, Dawid Siemek, whose work helped uncover a new chapter in the glacial history of the Carpathians. read here doi.org/10.1130/G548... @geosociety.bsky.social

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Jacek Szczygieł @speleojacek.bsky.social · 21/09/2026

Mission accomplished: cave deformation found, measured, and sampled on Amorgos (maybe some connected to 1956 EQ) and Ikaria (next to Samos) 9-day trip; 2 islands; 7 days of caving (1-5 caves/day); 20 caves (9-131 m of depth); 33 samples; two (efficient) friends

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Jacek Szczygieł @speleojacek.bsky.social · 16/09/2026

Like in a thriller, I found the best site with fallen, crushed stalactites and colums, sealed bedrock #fractures, a few hours before leaving Amorgos…so good I ran out of sampling bags. Did I find the 1956 #earthquake in the geological record? Maybe an older events? Dating will show

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Jacek Szczygieł @speleojacek.bsky.social · 14/09/2026

sample or not to sample? ... sample! another 2 days on Amorgos, 9 caves, two more to go. So far, no "smoking gun," a few compressed columns, some broken stalactites, and, unfortunately, very few active speleothems. But if it were that easy, someone would have done it already... ehh research💁‍♂️

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Jacek Szczygieł @speleojacek.bsky.social · 12/09/2026

First day of fieldwork in the #Amorgos 🇬🇷 #caves, looking not only for damage from the 1956 #earthquake but especially for older structures, to hopefully catch other events that are so far lacking in the records. First cave revealed some very tiny #deformation. Stay tuned @ncn.gov.pl

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Jacek Szczygieł @speleojacek.bsky.social · 23/07/2026

🏔️ Did glaciers really build the Tatra landscape? Our new paper in EPSL uses #cave sediments to reconstruct >5 million years of #landscape evolution, and the results challenge the traditional view of how #mountain valleys formed doi.org/10.1016/j.ep... #CosmoNuclides @ncn.gov.pl

doi.org

Redirecting

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Jacek Szczygieł @speleojacek.bsky.social · 10/07/2026

Why are steep limestone slopes so stable over 0.5 Ma? Now available #OpenAccess doi.org/10.1016/j.en... We structurally analyzed and dataed Alpine cave passage dislocations and used limit equilibrium analysis and #FEM elastic stress modeling to figure this out Thanks to @ncn.gov.pl

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Jacek Szczygieł @speleojacek.bsky.social · 09/07/2026

Quartz grains preserved in the #cave of the Western Carpathians reveal the first direct evidence of Mid-Pleistocene #glaciation in the region. Super proud of my PhD Student Dawid Siemek who just published research in #Geology @geosociety.bsky.social #OpenAccess doi.org/10.1130/G548...

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Jacek Szczygieł @speleojacek.bsky.social · 01/07/2026

Fresh off the press in Engineering #Geology: Long-term stability of steep deglaciated #slopes of Alpine karst plateaus #cave #speleothem dating; Limit equilibrium analyses; #FEM elastic stress #modelling; Deep-seated gravitational #deformations sciencedirect.com/science/arti... funds@ncn.gov.pl

sciencedirect.com

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Jacek Szczygieł @speleojacek.bsky.social · 15/06/2026

Despite the effort, we did not find enough #deformation in the caves around the Corinth #Rift (Greece) In fact, the poor available #cave documentation led to a lot of unnecessary driving and even more wandering through thorny bushes GOOD MAPS MATTER! @chrispennock.bsky.social @ncn.gov.pl

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Jacek Szczygieł @speleojacek.bsky.social · 12/06/2026

On the way to the caves, we visited Pisia #fault scarp studied in Mechernich et al. 2018, and the impressive knickpoint a few hundred meters from the sampling site doi.org/10.1029/2017... @paleoseismicity.bsky.social

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Jacek Szczygieł @speleojacek.bsky.social · 20/05/2026

Samara Canyon on #Crete - wet dream of geomorphologist with background in structural geology

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Jacek Szczygieł @speleojacek.bsky.social · 02/05/2026

Absolutely mind-blowing visit in Białowieża primeval forest🤯 The photos do not reflect the diversity… just stunning. PRESERVE this ecosystem, unique for the European scale (if not global)

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Jacek Szczygieł @speleojacek.bsky.social · 28/04/2026

#Earthday in the Silesian Planetarium (last Saturday) I told, among others, about eigenfrequency, i.e. why during mining tremors they nod chandeliers and not buildings, and how I translate it into earthquake research in caves #SciComm

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Reposted by Jacek Szczygieł

paleoseismicity.org @paleoseismicity.bsky.social · 12/03/2026

Postdoc position on speleothem seismic vulnerability from FEM modeling (1-2 years) in Katowice (Poland) w/ @speleojacek.bsky.social paleoseismicity.org/postdoc-posi...

paleoseismicity.org

» Postdoc position on speleothem seismic vulnerability from FEM modeling (1-2 years) in Katowice (Poland)

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Jacek Szczygieł @speleojacek.bsky.social · 18/02/2026

The real #UpsideDown is in the #cave where the channel incises into the ceiling, eroding upwards Polish #Jura

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Jacek Szczygieł @speleojacek.bsky.social · 11/02/2026

Is it C major, C minor, or rather 36Cl? Another day of sampling the #fault #scrap in eastern Crete 🇬🇷 @ncn.gov.pl project #fieldwork

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Jacek Szczygieł @speleojacek.bsky.social · 27/01/2026

📢Hot off press: Pitfalls of multiplied 3D landforms projection Why #mapping still matters in the #LiDAR-dominated times? We published some thoughts, tips and tricks on #cave mapping using the example of >10 km long, >1km deep Gamssteig Cave System in the Göll Massif #Alps doi.org/10.5038/1827...

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Jacek Szczygieł @speleojacek.bsky.social · 11/01/2026

Exploring a #cave by #climbing is the top tier of initiation. Clip from one of the three chimneys we climbed recently in one of the Tatra Mountains caves. From dozens and hundreds of days underground, days like this are remembered forever

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Jacek Szczygieł @speleojacek.bsky.social · 23/12/2025

Our paper, discussing the curious case of a short #fault scarp in the Podhale Basin and its Implications for the #Quaternary geodynamics of the Western #Carpathians, is now out. Link with 50 days of access authors.elsevier.com/a/1mJha,3sl42u… @paleoseismicity.bsky.social

authors.elsevier.com

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Jacek Szczygieł @speleojacek.bsky.social · 13/12/2025

Hot off the press📢 Some fault doesn't want to behave properly Read our story about the curious case of a short fault scarp in the Podhale Basin, Carpathians🇵🇱 That was quite a challenge for us: first to interpret it and later publish… www.sciencedirect.com:5037/science/arti...

sciencedirect.com

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Jacek Szczygieł @speleojacek.bsky.social · 28/11/2025

#FridayFault Strike-slip fault plane outcropping in the Melissotrypa cave in Thessaly 🇬🇷 look at the size of perfectly preserved structures @christospennos.bsky.social for scale @ncn.gov.pl SonataBIS fieldwork

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Jacek Szczygieł @speleojacek.bsky.social · 23/10/2025

Last week, I had the pleasure of organizing in the #Tatra Mts. 59 Polish speleological symposium. Inspiring invited lectures, great talks, and most importantly, discussions in the field where we shared the last decade of our research😁I am happy we could award 4 #ECR grants

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Jacek Szczygieł @speleojacek.bsky.social · 07/10/2025

There are still a few weeks left to apply for the postdoc position in my @NCN_PL project.👇 You can model using #FEM OR you're interested in #seismology OR structural resistance to #seismic waves? Help me test some controversial hypotheses! Let's break some rocks and calculate how they break :)

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Jacek Szczygieł @speleojacek.bsky.social · 28/09/2025

Not only do speleothems make caves enjoyable! Textbook hypogene morphology in Brzozowa #cave in the Polish Jura upland: cupolas, feeders, ghostrock.

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Jacek Szczygieł @speleojacek.bsky.social · 05/09/2025

📢Fresh off the press Unexpected latest Pleistocene W-dipping reverse fault-slip in the Maritimes Alps (SE France)—Insights from passage offset in Mescla Cave Now available in J. Of Quaternary Science onlinelibrary.wiley.com/doi/10.1002/... All started from discussion on PATAdays22 @paleoseismology

onlinelibrary.wiley.com

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Jacek Szczygieł @speleojacek.bsky.social · 05/09/2025

#climbing … because even the most passionate caver needs a sun ☀️ from time to time😉 Byczkowski route on the western face of Kościelec, #Tatra

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Jacek Szczygieł @speleojacek.bsky.social · 03/09/2025

Discovering unknown… love it August in the Northern Calcarouse Alps, the Göll massif. Oh, btw, the new #cave passages are on the N-S #fault which I described here: doi.org/10.2113/2024...

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Jacek Szczygieł @speleojacek.bsky.social · 31/07/2025

Here is the 50-day free access link authors.elsevier.com/c/1lUJp8RViAsze In contrast to previouse research, we show that even small #glaciers (2km long) can produce #microtextures on quartz #grains; hence, even small glaciers can be “caught” in depositional record via #SEM and reconstructed.

authors.elsevier.com

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Reposted by Jacek Szczygieł

Jason "Jay" R. Patton @earthjay.bsky.social · 30/07/2025

#EarthquakeReport for M8.8 #Earthquake offshore of #Kamchatka #Russia been busy responding and still doing that aftershock pattern matches 1952 M9 rupture patch '24 and 20 July '25 foreshocks see report to learn more about 1952: earthjay.com?p=12053 earthquake.usgs.gov/earthquakes/...

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Reposted by Jacek Szczygieł

Dr. Judith Hubbard @judithgeology.bsky.social · 30/07/2025

⚒️ 🧪 A M8.8 earthquake just ruptured the subduction zone offshore Russia’s Kamchatka peninsula. This is one of the world’s truly huge earthquakes, and a triggered tsunami is currently traveling across the Pacific ocean. This same fault ruptured on July 20th in a M7.4, and last August in a M7.1.

earthquakeinsights.substack.com

M8.8 earthquake strikes offshore Kamchatka

A dangerous subduction megathrust ruptures once again

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Jacek Szczygieł @speleojacek.bsky.social · 29/07/2025

Visiting Cork County 🇮🇪☘️ was a real structural #geology feast🤩 I’ll start with #boudinage, the extensional structure of a rigid layer is stretched and deformed between less competent surroundings. Shanvallybeg Beach near Bantry

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Jacek Szczygieł @speleojacek.bsky.social · 26/07/2025

When #cave columns are compressed and a bunch of fallen stalactites are lying around, one knows something more than just a gravity breakdown happened 😁 Hunting for #earthquakes traces in caves on Crete with @christospennos.bsky.social @ncn.gov.pl @paleoseismicity.bsky.social

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Jacek Szczygieł @speleojacek.bsky.social · 25/07/2025

You want to see some sexy #cleavage on the beach? Crosshaven, Cork County 🇮🇪 #fridayfold

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Jacek Szczygieł @speleojacek.bsky.social · 24/07/2025

Super proud of my first PhD student Dawid Siemek, critically thinking young scientist who just published “Size does not matter: Glacial record on quartz grains from Pleistocene #glacial deposits in Tatra Mts. (Western Carpathians) revealed by #SEM” www.sciencedirect.com/science/arti...

sciencedirect.com

Page not found | ScienceDirect

The page you were looking for does not exist or was moved.

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Jacek Szczygieł @speleojacek.bsky.social · 23/07/2025

Here’s some action 😉 A bit cringe #gopro clip from the fieldwork in Dadulas #cave nearby Siti #fault zone in eastern Crete: looking for the broken #speleothems @ncn.gov.pl @christospennos.bsky.social

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Jacek Szczygieł @speleojacek.bsky.social · 21/07/2025

Co-seismic offset or co-goat-running exposure 🧐 Western Giouchtas Fault, Heraklion Basin, Crete @christospennos.bsky.social and 🐐for scale @ncn.gov.pl

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Jacek Szczygieł @speleojacek.bsky.social · 14/07/2025

2h on Crete and already such a beauty 🤩 Surface rupture of the Lastros Fault doi.org/10.1016/j.te... We are heading even further east to look for more of those that have not been studied, and of course look for some deformation in caves @ncn.gov.pl @paleoseismicity.bsky.social

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Jacek Szczygieł @speleojacek.bsky.social · 10/07/2025

In my @ncn.gov.pl project on #coseismic #cave deformation in Greece, we use cutting-edge technology 💪

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Jacek Szczygieł @speleojacek.bsky.social · 03/07/2025

Peer review? More like pine review

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Jacek Szczygieł @speleojacek.bsky.social · 29/06/2025

84 caves in 6 weeks from easy walking through vertical squeezes to crawling in bugs. All between teaching, supervising graduates, admin, and PI duties. Quite a logistics🥵 Today I finished #fieldwork for #antropopression on #cave in #Nature2000 areas of the Polish Jura. I’m tired

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Jacek Szczygieł @speleojacek.bsky.social · 06/06/2025

On today's #FridayFault I found beautiful slickensides in the Między Sosnami Cave, Polish Jura. The #cave has a #gravitational origin, despite being in limestone. Few generations of broken flowstone imply its repeated reactivation. With <50km from LGM my first guess is forebulge

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Jacek Szczygieł @speleojacek.bsky.social · 05/06/2025

#TheLastOfUs moment during today's fieldwork in Polish Jura Uppland #cave. #Moth with #fungus growing out of its head, and there was more of it in a few caves in the vicinity...

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Jacek Szczygieł @speleojacek.bsky.social · 02/06/2025

fruitful week in the #caves of the Drama Basin, Greece. We found some bedrock deformations, broken speleothems, and massive collapses. Now it's time to deal with the samples. 24 samples from 5 caves, sounds like a promising start to Bahadir's PhD project @ncn.gov.pl @paleoseismicity.bsky.social

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