Robin Lacassin @RobinLacassin@qoto.org

In my new #tectoldies post I follow up on the 1891 #Japan #earthquake and the seminal article by Bunjiro Kotô published in 1893:

https://tectoldies.mystrikingly.com/blog/the-great-1891-earthquake-in-central-japan-2

In this article, probably for the first time in the world, B. Kotô makes detailed descriptions of the earthquake surface rupture and offsets, and explicitly linked #earthquakes to #tectonic faulting.

Kotô gave a beautiful 3D sketch 👇🏼 and an amazing narrative about mole-tracks (a now commonly used term for some specific surface ruptures): “Amongst the extraordinary things done by the earthquake, one that always drew attention was the earth-rent. It strikes across hills and paddy-fields alike, cutting up the soft earth into enormous clods and raising them above the surface. It resembles the pathway of a gigantic mole more than anything else.”

#mastoart #history #sciencehistory #tectonics

I wrote in my previous toot that I'm not a #dendroclimatologist. If more skilled researchers can interpret, or use the section of our just cut down #spruce tree that was dying because of dark beetle, here are some good photos. Don't hesitate to comment.

It's from our garden very close to #Fontainebleau #forest, just south of Paris in France. (ruler in cm)

#dendroclimatology #climatechange

As said yesterday, we had to cut down our 40 years old dying #spruce tree. It was severely attacked by bark beetle (you can see the holes on the edge of whole trunk section, and the larvae on other photos), likely after being stressed and weakened by #heatwave and #drought in the past years. A probable effect of #climatechange, #climatecrisis.

It's from our garden very close to #Fontainebleau #forest, 60km south of Paris, France.

I'm not a #dendroclimatologist so I cannot interpret in detail the trunk section. But I will post hr photos in next toot for those more skilled.

Task of the day: splitting wood 👇🏼

We had to cut down our 40 years old dying spruce tree 🌲. Will say more about it in forthcoming toots.

New paper published: A contribution to the quantification of crustal shortening and kinematics of deformation across the Western #Andes ( ∼ 20–22° S), Habel et al., Solid Earth, 2023

https://se.copernicus.org/articles/14/17/2023/ (open access)

#tectonics #orogen #subduction #Atacama #Altiplano

I just revived my #Tectoldies blog, which was a little sleepy for a while, with a new post about the first ever described #earthquake surface rupture (that of the 1891 Nobi Mw~7.5 earthquake in central Japan). 1/n

The 1891 fault rupture was indeed perfectly described and interpreted by Bunjiro Kotô in a 1893 article. It is admirably imaged by a B&W photograph in Kotô's article, and by this delicate anonymous watercolour painting 👇🏼, perhaps the first artist view of an active tectonic fault.

Read more: https://tectoldies.mystrikingly.com/blog/the-great-1891-earthquake-in-central-japan-1

My Tectoldies blog is about “the beauty of tectonics – the art of geological sections & other tectonic sketches.” Feel free to explore and comment previous posts. I'll toot about some of them soon.

#tectonics #ScienceArt #MastoArt #history #Japan #geology

WHAT ? French president, Emmanuel Macron, literally writes:

Who could have predicted the climate crisis…?

Who 🤔 ?
➡️ Thousands of scientists
➡️ 6 IPCC reports
➡️ 27 COP
➡️ even EXXON researchers tens of years ago
etc…

#climatecrisis #climatechange #DontLookUp

Happy geological new year 2023 !

#mastoart generated with Midjourney #AI - #Paris #toureiffel #rock #mountain #distopia

Here, near #Fontainebleau 60km south of Paris, yesterday's #temperature was higher than 16°C.

For the last day of 2022, tens of T° records broken in western Europe.

To remember that we are in “𝓌𝒾𝓃𝓉𝑒𝓇” I asked Midjourney #AI to generate something with the prompt “𝓃𝑒𝓌 𝓎𝑒𝒶𝓇 𝑒𝓋𝑒 𝒾𝓃 𝐹𝑜𝓃𝓉𝒶𝒾𝓃𝑒𝒷𝓁𝑒𝒶𝓊 𝒻𝑜𝓇𝑒𝓈𝓉” 👇🏼

#mastoart #climatechange #winter #heatwave

Found a beautiful #myxomycete in the #Cévennes (South of France) few days ago. Probably not exactly the famous laboratory #blob but close to.

I post here this awesome map from Serge Zaka 👇🏼

2022 has been the warmest year on record (since start of the measurements) for most of European countries.

Unfortunately, Serge Zaka is apparently not on Fediverse but he maintains an excellent twitter feed on #climate #agroclimate #weather #agronomy in #France, #Europe: https://twitter.com/SergeZaka (sorry for posting a link to the bird site)

#climatechange #climatecrisis #DontLookUp

USGS got very similar mechanism, but puts hypocenter deeper (around 20km). This perhaps means that the #earthquake rupture happened in the Gorda tectonic plate beneath the upper N American plate. The small Gorda plate is plunging under N America along the #Cascadia #subduction zone.

Magnitude Mw6.4 #earthquake in the region of the #Mendocino triple junction, at northern end of the San Andreas fault, #California. Mechanism is strike slip; rupture may have occurred on any of the ~N-S or ~E-W fault plane as it's a tectonically complicated area.

Mechanism Geoscope IPGP: http://geoscope.ipgp.fr/index.php/en/catalog/earthquake-description?seis=nc73821036

Time ago, the now scary bird site, was useful for science, knowledge building, hazard communication, etc...

We wrote a paper on that: Rapid collaborative knowledge building via Twitter after significant geohazard events.

https://gc.copernicus.org/articles/3/129/2020/

The answer of Jack Dorsey: Why ? 👇🏼

No comment 2 👇🏼

No comment 👇🏼

#santa #santaclaus #perenoel

The government of #Germany posted this on the scary bird site:

#Freedom of the press must not be switched on and off at will. As of today, the #journalists below can no longer follow, comment or criticize us. We have a problem with that twitter.

#censorship

Le Monde: Twitter suspend des comptes de journalistes : l’Union européenne menace le réseau social de « sanctions »

Twitter suspends journalist accounts: EU threatens social network with 'sanctions'

Just posted this 👇🏼 on the scary bird site.
Will see what happens.