tag:blogger.com,1999:blog-33253361.post5251767954713728588..comments2024-03-28T17:34:45.875-07:00Comments on earthquake prediction: Bolivia Earthquake of 6.6 on 22nd November 2011AMIThttp://www.blogger.com/profile/11156510982882875208noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-33253361.post-32091344529676374072011-11-26T07:17:34.064-08:002011-11-26T07:17:34.064-08:00ROGER
Scientists are not sure as to what moves th...ROGER<br /> Scientists are not sure as to what moves the plates.<br /> In case of plates other than subduction ,it is still difficult to explain the force, as gravitational pull on subducted part is not present<br /> More surprising thing is that ,Venus do not have any plates and active plate tectonics. why, is still a mystery<br /> One explanation given is that, being hot Venus have no water content,which helps in movement.<br />(which is not convincing)<br />AmitAMIThttps://www.blogger.com/profile/11156510982882875208noreply@blogger.comtag:blogger.com,1999:blog-33253361.post-60442580794704904972011-11-25T18:23:29.152-08:002011-11-25T18:23:29.152-08:00Amit;
1) The mantle is not molten and the downwar...Amit;<br /><br />1) The mantle is not molten and the downward moving crust is cold (by comparison).<br /><br />2)Evidently; it happens.<br /><br />3)I don't know for sure but I had the impression that it was a sudden change in volume.<br /><br />Yes, there are spreading centers pushing on one end and the weight of the descending crust pulling on the other end.<br /><br />RogerRoger Hunterhttps://www.blogger.com/profile/03159156315266044017noreply@blogger.comtag:blogger.com,1999:blog-33253361.post-83505522921943752822011-11-25T01:19:53.942-08:002011-11-25T01:19:53.942-08:00Roger
few questions still remain open like
1)With...Roger<br /> few questions still remain open like<br />1)With such a huge temp and pressure inside ,how the crust can push inside up to 10 times thickness ,without melting?<br />2)Are heat current forces are enough to drive the plate at such a depth with double resistance-resistances at the crust boundries and inside the mantle<br />3) By phase changing ,if we man changing from solid to semisolid/viscuous liquid,how and why it should produce jerks/quakes?<br />as it a slow process.<br /> Phase changing is slow processs and may not produce jerks(to the best of my knowledge)<br /> <br /> We know the plate(which runs along coast of south America) area,approx volume,average desinty,average speed of the plate, and coeffient of friction between the two plates.<br /><br />Now can we find out the force required to move this plate ,deep down up to 600 kms against all frictional forces?<br /> And the heat current forces moving the plate are enough to move it?<br /> or<br /> are there any other forces acting on the plate and moving it?<br />AmitAMIThttps://www.blogger.com/profile/11156510982882875208noreply@blogger.comtag:blogger.com,1999:blog-33253361.post-81253051133098914152011-11-24T20:00:54.478-08:002011-11-24T20:00:54.478-08:00Amit;
No mystery there. The area is part of a sub...Amit;<br /><br />No mystery there. The area is part of a subduction zone that runs along the coast of South America.<br /><br />The oceanic crust dives down into the mantle and the deep quakes are due to phase changes in the crustal material under heat and pressure.<br /><br />RogerRoger Hunterhttps://www.blogger.com/profile/03159156315266044017noreply@blogger.com