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Using the search string, "Do Seismic Waves Travel Faster North To South than East to West ?" on google yields two pages which lack any assertion of the sort. May I ask what source "ewe" got that from?Perhaps you are confused because S-wave velocity thru rocks is different than it is through water.(1.)But if that is not the case, I think that we, in the interests of suffering humanity should avoid uttering obvious twaddle so as not to cause a flock of the gullible to go stampeding about the creation like a flock of sheep -- because they saw it in the naked scientist instead of "Uncle Willy's joke bag"PS: Your map location shows that you are somewhere on the Arabian peninsula. I hope that you are wearing your hat when you go out in the noonday sun.//www.youtube.com/watch?v=HPnJM3zWfUo [Links inactive - To make links active and clickable, login or click here to register]LOL...thank ewe Pecos_Bill !...I must have mastered the art of uttering twaddle without even realising it.I did view the conundrum on a BBC program about Earthquakes. Unfortunately I can not find the referenced program and suspect it's no longer available for viewing !...what a poo !!
Neil! Good to see you back!I don't know the answer to this question, but my guess would be that the planet composition is relatively symmetrical on the inside and so there shouldn't be a massive difference for wave transmission; that said, there is clearly some sort of asymmetry that generates the Earth's magnetic field with the polarity that it does, but whether that would have an influence, I am uncertain.Chris
There is a suggestion that Earth's inner core may be rotating slowly relative to the Earth's surface, by perhaps 1° per year. If so, this could contribute to Earth's magnetic field, as differential rotation is a contributing factor in laboratory experiments on geomagnetism.This rotation was detected because there is an East-West asymmetry in the speed of seismic waves through the Earth's inner core. See, for example: http://arxiv.org/abs/1111.1121 [Links inactive - To make links active and clickable, login or click here to register]PS: Since this region of the inner core is thought to experience a gentle rain of iron crystals, I assume that this is no place for ewe...
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