"Wheelerguy" (wheelerguy)
05/30/2015 at 12:41 • Filed to: None
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"Wheelerguy" (wheelerguy)
05/30/2015 at 12:41 • Filed to: None | 1
| 14 |
Shaky question after the jump and the jump.
So you see, I just read a Gizmodo article about !!!error: Indecipherable SUB-paragraph formatting!!! , and read this tweet:
!!! UNKNOWN CONTENT TYPE !!!
!!! UNKNOWN CONTENT TYPE !!!
Then I remembered that Chile got !!!error: Indecipherable SUB-paragraph formatting!!! . I don’t know what kind of fault system Valdivia had, but can a place on Earth with a big-ass fault line or volcano shake to the tune of magnitude 9.6 or higher (Can the San Andreas Fault get a 9-er?)? Where’s the likeliest? And just how screwed is that place place when it does hapen (please God don’t make it happen PLEASE!!!)?
1111111111111111111111
> Wheelerguy
05/30/2015 at 12:48 |
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Cascadia subduction zone will likely see something in the 9 to 10 range. The plates are completely locked now. And we’re overdue.
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1111111111111111111111
> 1111111111111111111111
05/30/2015 at 12:49 |
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http://earthquake.usgs.gov/data/crust/cas…
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Wheelerguy
> 1111111111111111111111
05/30/2015 at 12:51 |
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something in the 9 to 10 range
!!! UNKNOWN CONTENT TYPE !!!
we’re overdue
Yeah, sure why not?
[ Disclaimer: There goes all of my nope ]
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1111111111111111111111
> Wheelerguy
05/30/2015 at 12:53 |
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Here’s another good article about it.
http://pnsn.org/outreach/earth…
Hoccy
> Wheelerguy
05/30/2015 at 12:58 |
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The sizes of earthquakes are usually defined by the shear strength of the rocks/faults. Since the lithospheric plates move, tension is building up in the rock/fault. When the rock/fault can’t hold more tension, we get movement and an earthquake. Something between 8.5-9.5 is the largest possible, because that’s when the rocks can’t hold any more tension.
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Wheelerguy
> Hoccy
05/30/2015 at 12:59 |
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Ah. Quite swell to see this kind of explanation.
415s30 W123TSXWaggoIIIIIIo ( •_•))°)
> Wheelerguy
05/30/2015 at 13:17 |
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Well the San Andreas is a strike slip fault I believe, it has its limitations, I went to school in SF so they go over earth science a lot, especially ours. There is a fence out at Pt Reyes that was broken and shifted apart in 1909, but the movie is insane.
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Hoccy
> Wheelerguy
05/30/2015 at 13:26 |
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Found a book on the subject. The fault moves about 3.5m per 100 years, and release of the tension (strain) that builds up over 100 years will give a magnitude 7 earthquake. That is if 50 km of the fault moves at once. If longer parts move or more stress is built up, the earthquake will get bigger. It’s not very likely though, as only a handful earthquakes has reached over 9.0.
Satoshi "Zipang" Katsura
> Wheelerguy
05/30/2015 at 13:32 |
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I really don’t understand why Audi needed a widebody. Or that absurd wing, really.
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Wheelerguy
> Hoccy
05/30/2015 at 13:35 |
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So if I were a Bond villain, then I just put ten or fifteen 50-gigaton nukes at strategic spots in a fault of my choice (which is Cascadia ), then?
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Hoccy
> 1111111111111111111111
05/30/2015 at 13:39 |
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Well, the only time the plates aren’t practically locked to each other, is in the event of an earthquake. And according to the links you’ve posted the reccurrance interval of such an earthquake is 400-600 years, which means that it’s not excactly overdue. On the other side, it doesn’t rule out that an earthquake can happen tomorrow, it’s just the average time period between quakes of that size.
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Hoccy
> Wheelerguy
05/30/2015 at 13:40 |
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You don’t have to be a Bond villain, it’s the dream of all geologists as well.
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Wheelerguy
> Hoccy
05/30/2015 at 13:44 |
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Well, being a Bond villain can accelerate the process.
Sneaky Pete
> 415s30 W123TSXWaggoIIIIIIo ( •_•))°)
05/30/2015 at 14:54 |
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Correct.
The BIG quakes that can cause tsunamis are of the subduction type. One plate is being shoved under another, when they let go, it’s a huge release of energy.