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Originally posted by pikestaff
Just a side note, from notes I made years ago, volcanic activity has gone up 300% in the last 2,000 years, I presume the activity is still rising?
By sucking or extracting the water from the ground, the soil gets porous, less dens and more 'air pockets' are formed in some areas, that the slightest movement( by drilling or a small quake) could lead to a larger slide or EQ in this case. That's why the damage was very local and not spread a 100km from the epicentre?
Without this drainage it would eventualy happen naturaly, it would only take more time.
Because it happened this way, could it be the reason why there were not many aftershocks recorded? Because it wasn't a build up of pressure? Like we saw in Italy, where there are aftershocks up till today.
Could it be that after the flooding in September the ground pushed some of the soil in it's former position and making it 'weak' that when it dried in October the ground began collapsing and making these cracks?
So i'm suggesting it's not the ground that is opening but rather collapsing. Or is it just like you see when the ground top layers are splitting because of the heat?
Also i'm wondering what measures they are taking to prevent this in the future. The region is known to be dry and famous for it's olive and orange(citric fruits) plantations. They need the water and the south is getting drier every year.
And the cracks on the Canary islands have nothing to do with the ones in Murcia, but it's rather the caused by the recent volcano activity? Are there any faults connected or close by between these two regions?
Originally posted by chiefsmom
This is pretty interesting.
We had a crack form, here in UP MI, in the US a few years ago, and I'm not sure that they figured out what caused that either, although it is no where near as big as that one.
I think the earth is just changing. We are just going to have to deal with it.