That's interesting. The position of the Torness nuclear power station in eastern Scotland, and other British coastal reactors, did not take account of the Storegga Slide, which caused a large tsunami in about 6100BC.
Right, to summarise, I think what we now know is that we have some soft, Quaternary, deposits, maybe fluvial or marine alluvium, to the north and south of the site. That would not be sensible to build anything very heavy upon.
The plant itself is built on the Tertiary...
:oops: That should have read Tertiary rather than Quaternary (but it doesn't change the argument very much).
The basement rock of granite type material starts about 800 meters below the power plant and is overlain by the Tomioka Formation of Late Miocene/Early Pliocene sedimentary rocks upon...
Oh dear, I've just found a paper about the geology written in English:https://ir.kochi-u.ac.jp/dspace/bitstream/10126/2261/1/N022-04.pdf
The Taga Group and its Tomioka Formation are indeed Quarternary - Late Miocene/Early Pliocene. Much younger than I had assumed and so likely to be much...
LOL There was a map posted here several pages ago! The anonymous professor gave the name of the Sandstone/siltstone formation. This is the 'bedrock' that the power plants are built on. The Quarternary deposits cover this bedrock just north and south of the site. The builders were not...
Correct me if I'm wrong, but I think the Quarternary deposits are to the north and to the south of the plant. The sandstones and siltstone below the plant are much older (and stronger).
How a rock behaves in an earthquake is very complicated and how a building sitting on top behaves is even...
The trouble with general terms like 'sandstone' and 'mudstone' is that they tell you approximately nothing about the strength and probably nothing about the permeability of the rock.
Sandstone is any sedimentary rock composed of sand grains; mudstone is a sedimentary rock made of much finer...
So now we know that the power station is built on solid geology not alluvium. 'Mudstone' should be read as stone rather than mud. The buildings are not going to slide into the sea, as someone suggested a great many posts ago.
The significant detail about how permeable the rock immediately...
What we need is not just a geologist (like me) but a geologist that reads Japanese and can find the data.
A quick scan through the Report of Japanese Government to the IAEA Ministerial Conference on Nuclear Safety June 2011 http://min.us/mvoVGLP appears silent on the matter of site...
The reading is on the ground in a road gutter near a drain. Probably cesium 137 gets washed down from a large area and concentrates by a few orders of magnitude. It illustrates that relying on average measurements over an area are not appropriate when assessing the risks to small children with...