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@UKVal agree, thats why i wanted nancy to see if the stack at three was doing anything.... those buildings look so rough... don;t know how much more they can take of the shaking.. and the steam we saw today may inof itself have some minor effect... steam is very violent

@marie rich I think that is the one I saw posted recently, didn't realize it was the 1st. When was the last quake in the area? Was the one on the 1st the last one?

@fitter ah, got it.

may 3 (4) on land. told that’s unusual
earthquake.usgs.gov Magnitude 4.5 - NEAR THE EAST COAST OF HONSHU, JAPAN
2011 May 03 13:57:19 UTC
QuakeAlert
DATE : 05/05/2011 16:58:21
TIME : 17 minutes ago
REG. : off the east coast of Honshu, Japan
MAG. : 6.1
DEP. : 24.2 km
ID : 109078
quakes.globalincidentmap.com Magnitude mb 6.3
Region OFF EAST COAST OF HONSHU, JAPAN
Date time 2011-05-05 14:58:17.0 UTC
Location 38.30 N ; 144.04 E
Depth 2 km
Distances 240 km E Ishinomaki (pop 117,233 ; local time 23:58:17.8 2011-05-05)
215 km SE Kamaishi (pop 43,107 ; local time 23:58:17.8 2011-05-05)

Those are one's I found of interest- prob. been many more. 1600+ since 11Mar.

Looks like the whole place is on fire.

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@nancy can you square the line so it runs at a horizontial elwvation, bring down the left side so it level but use the left start point as the center line of the pipe in the stack, or is the pic frame at an angle

it has been said the basement lies on bedrock. so no liquification if this is true.

@Edano agreed. not likely. but fractures...

@Edano everything we have found says fuku is not on bedrock. Do you have a link for whatever is claiming it is?

we could measure the #4 angles and calculate when it's over.

Just the lose of support would be enough. Clay minerals are usually the cause of liquifaction.

@Nancy On 3/11 Japan "jumped" 13 feet to the east, that can change things.

You don't have to have bedrock to have a solid foundation, sand is a good footer.

btw, the putzmeister is gone, isn't it ? i mean, not that it could be of any use elsewhere....

I think what we are looking at here is loss of material. Not just soil composition, they made sure when they built it that it was on solid ground.

@fitter According to what I've read parts of the coastline sank up to 2.5 meters.

Quick description of liquefaction. btw, post below from geology.com is specifically about it in Japan EQ. Liquefaction is the name given to the process that converts a solid soil mass into a liquid.

Liquefaction occurs in cohesionless soils (typically those with a higher content of larger grains such as sand sized clasts) which have water in the pore spaces, and are poorly drained.

When the seismic waves from the earthquake pass through the soil, the vibrations cause the individual grains in the soil to move around and re-adjust their positions. This ultimately results in a decrease in volume of the soil mass as the grains pack more tightly together (a reduction in porosity).

The pore water which was originally in those spaces becomes compressed. Water is relatively incompressible and as such it pushes back against the soil grains (more correctly this is described as an increase in pore water pressure). The pore pressure becomes so high, that the soil grains become almost buoyant causing a significant drop in the shear strength of the soil to a very low value.

When this occurs the soil loses it's ability to support loads (technically described as a loss of bearing capacity) which can cause subsidence of building foundations.













First answer by ID3522331322. Last edit by SBDW1. Contributor trust: 143 [recommend contributor]. Question popularity: 2 [recommend question].

@Edano: I also can't see it anymore. Or is it an optical thing because of the light?

@Edano not sure were disscusing this moring, it looks moved further up the building