On Noto Peninsula where coseismic uplift was ~2m.
Sequence pre-earthquake, EQ +3 months, EQ +23 months. I thought we would be able to monitor this nice flat surface for weathering efficiency over the years…

Too old, too dirty, to unradiogenic? Can’t use your #speleothem? Don’t despair! ITL dating is here to help you out! www.sciencedirect.com/science/arti... @speleoseb.bsky.social @sumikotsuka.bsky.social

Our work on surface deformation by the Noto Earthquake is finally out! Fukushima Yo led a team to create and ground-truth a full 3D deformation field from InSAR on the entire Peninsula. We show that repetition of similar quakes explains the 1st-order landscape features. 1/5
doi.org/10.1126/scia...

A recurring question for us: Where do beach cobbles come from?
Here a cool answer on a ~340ka terrace that shows strath & sed cover:
(Salt?) weathering of volcaniclastics frees clasts when it was a coastal (intertidal?) platform. Strongest survive & make up sediment. Or so we think.

Some context for the 🇯🇵 pictures I am posting. @sumikotsuka.bsky.social & I are working on Sado Island and Noto Peninsula since '23 for the DFG project TEMARI. Both sites face 🌊 on 1 side, are tectonically active (Noto EQ), & have many many marine terraces

*What controls the creation of terraces?

We have shown that thermoluminescence dating can provide reliable age estimates for particularly old speleothems: (open access)
www.sciencedirect.com/science/arti...

short summary at bbh.pik-potsdam.de/en/thermolum...

If you have dirty and seemingly ’undatable‘ speleothem samples in your lab - look no further! Isothermal Thermoluminescence (ITL) dating can help you ! Look at our latest study led by Junjie Zhang & Sumiko Tsukamoto of #LIAG and #TuebingenUni : eur02.safelinks.protection.outlook.com?url=https%3A...

We were able to reach the same spot on the north coast of Noto Peninsula where I took pictures last November. That was before the earthquake and the ~1.7m of uplift it caused at this location.
Before/after below

As a result of liquefaction, we see manholes shooting up across the pavement. At first I thought it was the land sinking around fixed water pipes, but it seems that they do actually move up. Is it a matter of buoyancy? They're mostly empty after all. Does someone here know?

Back in Noto Peninsula 🇯🇵 for a post earthquake survey. Here you see a bay near Monzenmachi, we measured 4.4m of coseismic uplift. The white rocks are covered by organisms that lived in the sea, now perennially emerged. Note the now dry harbor on the right.