Comments on: Seismograms from North Korea http://greengabbro.net/2006/10/12/seismograms-from-north-korea/ rock out to the apparatus Thu, 29 Jul 2010 20:36:43 +0000 http://wordpress.org/?v=2.6.3 By: Gengar http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-5002 Gengar Fri, 13 Oct 2006 09:14:12 +0000 http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-5002 I was wondering if the Russians were just using data from their own nuclear tests to extrapolate the yield from the size of the earthquake. As it is, the combination of a weak signal, and no idea of the test set-up or the local geology (and maybe even the bomb design would make a difference) means that an estimate is going to have some rather large errors... not that that's being reported of course. I was wondering if the Russians were just using data from their own nuclear tests to extrapolate the yield from the size of the earthquake.

As it is, the combination of a weak signal, and no idea of the test set-up or the local geology (and maybe even the bomb design would make a difference) means that an estimate is going to have some rather large errors… not that that’s being reported of course.

]]> By: Lab Lemming http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-4999 Lab Lemming Fri, 13 Oct 2006 07:45:24 +0000 http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-4999 Perhaps the cable method is what caused the Russians to originally overestimate the yield of the North Korea blast. After all, that method assumes some correlation between the expected and actual yield. Perhaps the cable method is what caused the Russians to originally overestimate the yield of the North Korea blast. After all, that method assumes some correlation between the expected and actual yield.

]]> By: yami http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-4980 yami Thu, 12 Oct 2006 20:10:17 +0000 http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-4980 Heh. One of my professors told a story about back in the Cold War - we knew the Russians had staggeringly good estimates of the yield on our weapons tests, and seismologists were frantic trying to figure it out. Turns out they were looking at satellite photos and counting the number/length of cables laid out on the ground before the test... Heh. One of my professors told a story about back in the Cold War - we knew the Russians had staggeringly good estimates of the yield on our weapons tests, and seismologists were frantic trying to figure it out. Turns out they were looking at satellite photos and counting the number/length of cables laid out on the ground before the test…

]]> By: ruth http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-4973 ruth Thu, 12 Oct 2006 16:25:02 +0000 http://greengabbro.net/2006/10/12/seismograms-from-north-korea/#comment-4973 When we moved to Santa Fe (1990), the first neighbor we met worked at LANL in "treaty verification." He told us that there is no way to verify by siesograms, alone- that they rely on satellite photography of ground activity, etc, to get the big picture. Mel also did aurora borealis research- used to go up to U of Alaska to fire off rockets loaded with some element ('ve forgotten which one) during an aurora event to observe aurora behavior. When we moved to Santa Fe (1990), the first neighbor we met worked at LANL in “treaty verification.” He told us that there is no way to verify by siesograms, alone- that they rely on satellite photography of ground activity, etc, to get the big picture.
Mel also did aurora borealis research- used to go up to U of Alaska to fire off rockets loaded with some element (’ve forgotten which one) during an aurora event to observe aurora behavior.

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