#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

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

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 :)

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

📢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

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

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...

We're hiring! 2-year #PostDoc in #speleothem #seismic vulnerability from FEM modeling to enhance @paleoseismicity.bsky.social of Hellenides (Greece) Part of @ncn.gov.pl project at the University of Silesia, Poland Deadline: 31th October 2025 Details 👇 skk.erecruiter.pl/Offer.aspx?o...

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.

#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/...

⚒️ 🧪 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.

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

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

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

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...

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

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

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

Polish polish science @ncn.gov.pl

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

Peer review? More like pine review

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

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

#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...

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

Finally, after a 6-month visa battle, we started collecting data for Bahadir's PhD, part of the Sonata BIS @NCN_PL project. In Peristerionas #cave, 500m from the Drama Basin #fault🇬🇷, we measured and sampled bunch of open #fractures and destroyed (sheared and compressed) speleothems

We tried yesterday, with my new PhD student Bahadir, our new fancy equipment: a lidar scanner for cavers built in the Polish Academy of Science github.com/JanuszBedkowsk… IT IS BRILLIANT INVENTION! @ncn.gov.pl

Today, I visited Wielkanocna (Easter) Cave, the first #cave pit I ever descent on the rope back in …May 1993 Polish Jura

Confusing speleogenesis of gravitational #cave in the karstic region; Polish Jura.

“Minecraft-like” cliff 😂 with impressive Kinchkha Waterfalls in upper Okatse Canyon; Georgia 🇬🇪

Today, we trekked up to Toba waterfall: amazing wild forest, fantastic landscape, and because we had to walk through an cold river up to our thighs there were no other tourists (rare these days). Martvili region; Georgia 🇬🇪

the majestic Ushba (4710 masl), Caucasus; views on Georgia flank

One day, governments will realise that they let universities close the only departments that had the skills and knowledge to understand the subsurface, hazards, climate change, and where to find Earth's resources. And they no longer have the workforce for the sustainable future they promised.

New papers on paleoseismology, active tectonics, and archaeoseismology (April 2025) paleoseismicity.org/new-papers-o...

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

#FridayJob📢 We're hiring! 2-year #PostDoc in #speleothem #seismic vulnerability from FEM modeling to enhance paleoseismological record of Hellenides (Greece) Part of @ncn.gov.pl SonataBIS project at the University of Silesia, Poland Deadline: 25th May 2025 Details 👇 skk.erecruiter.pl/Offer.aspx?o...

#fridayfold Durmitor Mts (Montenegro), enjoy😉

:-) :-) :-) 10 fully-funded PhD positions :-) ::-) :-) Please forward to anyone who might be interested. We offer 10 PhD positions at the interface of geology, ecology and geography. In particular, I would like to promote subproject 6 (see figure). www.plus.ac.at/doctorate-sc...

Hot off press! The #Pleistocene reactivation of reverse and strike-slip #faults in veeeery slow part of the Alps, and with a slight salt twist, all that found in deep #caves whose passages were offset Published #OA in @lithospherejournal.bsky.social @ncn.gov.pl pubs.geoscienceworld.org/lithosphere

🧪Attached to #speleothems? Maybe (just maybe) you are a #magnetic particle? 😉 check our latest study on magnetic particles in a flowstone from #Waipuna cave, #Aotearoa, and what they can tell us about past hydrological conditions 👇 kudos to a fantastic team! 🤩💪 www.sciencedirect.com/science/arti...

Nothing makes your weekend fun like a Friday evening rejection email

See the science we do. A community lab facility serving the USA and the world. Thank you National Science Foundation. m.youtube.com/watch?v=t3RW... #scicomn 🧪

Day two of basic winter mountaineering training included in the caving course It started with ☀️ and changed to freezing wind and fog, but it was still a very nice trip #Tatra Mts

Usually I would post #fridayfault but today was more #fridayfall 😅 As the part of caving course we trained today basic winter mountaineering skills #Tatra Mts

Understanding Past Earthquakes – an open access book paleoseismicity.org/understandin...

An amazing profile with a record of 600 ka of environmental changes in Demänovská #cave. David (PhD student) will analyze quartz grains to see which beds are associated with glaciations. So far there is a lot of LGM research in the Carpathians but anything older is assumption and guesstimation.

Scallops in the making Demänovská Slobody #Cave 🇸🇰

If you have an idea on tectonic/paleoseismic research in caves and looking for a postdoc opportunity, here is 👇 call for a 6-24 month scholarship postdoc in Poland. DM me if you would like to join my team. nawa.gov.pl/en/programy-...

Glaciotectonic folds outcropping in the Baltic cliffs in Gdynia City, Poland. Those are photos of the “romantic walk on the beach” last spring 😂 #fridayfold

As the winter part of the caving course, I took the participants to one of my favorite places in the #Tatra Mts: Miętusia Valley, to the Nad Dachem #cave, which means "Above the Roof"; the entrance is perched 70 m above the valley. Note how there is frighteningly little snow.