[Noisebridge-discuss] Earthquake magnitude

[John Menerick]

Indeed.  Even more die from improper mercury spill cleanups.  #idonthavethefacts

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On Jan 6, 2012, at 8:13 AM, girlgeek <girlgeek at wt.net> wrote:

> Don't worry too much about your first earthquake.  What is the average number of people hurt or killed by cars or muggers on Valencia St. each year as compared with the number of people who fall into chasms caused by earthquakes on Valencia St. each year.   The major damage that I saw after Loma Prieta(?) earthquake was in the marina district to which I offer this technical thesis...
> 
> http://www.youtube.com/watch?v=YdsKu21hV4I&feature=related
> 
> -Claudia 
> 
> On 1/5/2012 8:40 AM, Tony Longshanks LeTigre wrote:
>> 
>> Sorry, I diverged from the thread topic there - I've retitled this message to mark a new thread.
>> 
>> If anyone will write a brief synopsis / nutshell weaving together the Entscheidungsproblem, Computational Complexity Theory and the Church-Turing Theorem (and /or Church-Turing thesis) that I could include in ZiP#1, much obliged.....my plate is full.
>> 
>> 
>> On Thu, Jan 5, 2012 at 8:11 AM, Tony Longshanks LeTigre <anthonyletigre at gmail.com> wrote:
>> On Thu, Jan 5, 2012 at 7:20 AM, Joshua Juran <jjuran at gmail.com> wrote:
>> 
>> I know the perfect song for that.  It's great -- it starts with an
>> earthquake...
>> 
>> 
>> Funny you should say that.
>> 
>> I'm writing something right now for ZiP Issue One on the logarithm used to calculate earthquake magnitude. There is a lot of general public misinfo / ignorance on this subject. Many people, and even many media outlets, think quake magnitude increases by a simple factor of 10 for each full number you go up the scale, when in fact - correct me if wrong - an increase in one number represents               32 times more energy, and an increase of two full numbers equals almost 1,000 times as much energy released (900 and something). Meaning there is a huge difference between a 4.0 and a 6.0 magnitude earthquake. A 4.0 you might barely feel, while a 6.0 is big enough to, excuse the language, Seriously Fuck Shit Up. The 1994 Northridge quake only had a moment-magnitude of 6.7; Loma Prieta 6.9 - but then there's the surface wave magnitude.....that's of greatest import to us humans. It's complicated. But I'm so into it!
>> 
>> Any other earthquake aficionados / seismology geeks in the house? It's one of my choice topics. If I make any noticeable contribution to hacking I would like it to be seismology related; i.e., a way to increase our accuracy in earthquake prediction.
>> 
>> Also, everyone still says Richter Scale but my understanding is it's not widely used these days and is not accurate for measuring large earthquakes (above 7.0 or so). Moment magnitude seems to be most widely used these days, in my experience. Can anyone confirm / deny / elaborate?
>> 
>> I am 75% looking forward to / 25% dreading my first Major Earthquake Experience. From all the first-hand accounts I've read and heard (hundreds, maybe thousands), they can be terribly exciting. I just hope I'm not crossing Valencia when the next Big One hits: in 1906 a big rift opened up in the middle of that street......
>> 
>> 
>> 
>> +0ny
>> 
>> 
>> 
>> 
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> 
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