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New 6.0 Earthquake: American Canyon ~18 mi from >Moi<
As reported here.

3;20ish AM: Horiz. accel. rate began to be ominous at 5 seconds or so in. Some books, wall hangings down.
Fortunately it quit at 10 to 13 sec. Stet fortuna domus, as the House motto went: fortunately the house stands.

Sent in my report. (But wtf.. it's been National Earthquake-weather since the Shogunate, eh?)
Take more than that to be Surprised!! this year. Er, meh
New Just saw the news and figured it was close!
Came to post here, but there you are. Glad to hear you're OK and it's not the big one.

Adjust your GPS coordinates as required. You're on the Northbound Pacific plate?
Alex

"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."

-- Isaac Asimov
New Rodgers Creek Fault seems the perp to watch here..
via this '11 summary.
but for all our scienterrific progress in geo- ... p-waves, s-waves and such, it's still a crap shoot; much less of a one than anytime you hit a 2-lane in an area where there are more WIne-sampling spots than armored-Hum-Vees + droids.

(Don't have a 'earthquake survival kit'; figure that if I can't assemble such from the rubble, after? well, there may be no Assembler left. Y'know?)
Do have a generator; enough Start-current at 220 VAC to run the Well-pump--never started it up; left in factory preservatives because: once you do the start-up drill, you now have to run it periodically/else rust and all. I'll go with the Odds that the sucker will work--it was a genuine Steal at a couple C-notes for 4.4 KWP; subsequently, such models seem to go for $350, more-often 500+ to the uninformed. Other survival needs will appear, but if'n ya can't run Well/get water? + our utter dependency on e- Power, well.. ...

Trouble with our perception of one of these always is: Yeah.. coulda been a Close-one IF you Are near the epicenter, a mile or so down.. But as with Loma Prieta in '89.. a much longer-persisting heavy shaking, here: at the Real epicenter: well, you know.
New OK, here are the USGS's simulations of a 7.2 quake.
Rock and roll. You're damned close! And, you're on the North American plate.

[edit] add plate
Alex

"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."

-- Isaac Asimov
Expand Edited by a6l6e6x Aug. 25, 2014, 10:32:22 PM EDT
New Thanks for heads-up (I think..) 7 is no lucky number.
Wasn't aware that USGS did these simulations/duh. Need to do some exploring there.
This scenario, which involves rupture of two faults, is much less likely to occur than any of the magnitude 6.8 or magnitude 7.0 scenarios.
"Comforting", that. Sorta--it's such a natural line, those two.

As to what this quake did to stresses on Rodgers [???] Maybe they can/will extrapolate on the possible interactions, later.
Nicely scary simulations: if the twisting of Rte 101 is derived from some decent math: doom for many.
On view looking S. from S. Rosa: Valley of the Moon is off to left (E.) a bit; unclear if Petaluma distance is scaled;
anyway, a 7? my odds better than S. Rosa's (heavily damaged by SF 1906.)

So then.. in addition to the psychological + mobs problems: add-in and stir. Pretty sure my cinder-blocks weren't stabilized by re-bar + concrete
(if they even do that now.) I shall simply have to arrange to be outside in a field.
That'll do it :-)

Ed: Add Local map places moi exactly between this fault and Rodgers. Kenwood is 5 mi N. of Glen Ellen, there shown.
31% Probability/30 years re Rodgers. Unless this one changed that guess, too.
Expand Edited by Ashton Aug. 26, 2014, 04:12:03 AM EDT
New OK. Biggest problem is that you will virtually get no warning.
TV news had a segment yesterday talking how earthquake waves move at the speed of sound while a warning from a sensor can move at the speed of light. They also talked about how the number of sensors is increasing at a rapid pace.

Obviously, some distance from the epicenter is required to get a warning you can react to.
Alex

"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."

-- Isaac Asimov
New And the speed of sound is faster in a solid (like the ground)
--

Drew
New Lots of interesting physics in earthquakes.
P-waves travel fastest and arrive first.

S-waves (shear waves) travel perpendicular to the P-wave.

They've worked out the physics of waves bouncing off the crust (to reflect around to the other side of the world) and off the core.

The Jiggling Earth - Or What are All Those Squiggles?

Cheers,
Scott.
New Well, the Model picks a spot way S. as epicenter for this simulation.
Whether that is random (I doubt) or from lore and expectation that that point is the likely confluence? can only suppose the latter. Unclear if the epicenter Must-be in the overlap portion of their common azimuth. These two faults don't overlap for much of their extent, so there's a clue.
Separate roulette re. either one, solo. (Throw in San Andreas' count-down timer for further tragicomic relief: beats any manufactured-Game.)

If.. in-time before the event: cheap warning devices proliferate--like current Weather-emergency VHF boxes--I can be outta this cottage at-the-speed of-Moi (shooing a cat or two if inside: that's Easy.) Similarly, should the numbers crunch such that Rodgers Creek's rupture-probability gets a huge boost? Well ... I have a fondness for science; it's fed me since sentience.

Anyway, depending on New-numbers, I might well abandon my creekside patch to the next wannabe-Gentry, take the mo-nay, abandon 97% of mere-Stuff and migrate. Digs are fungible; wherever you go--there You are. (RV types grok this, right?)



Superseding that Master-plan, of course is the feral pair--master trap-evaders both--they won't be abandoned. If they prove better trap-evaders than the trapper?
I guess we'll all go together when we go. {Fanfare}
(Not really worth worrying about, actually; may be an honourable-evasion of now expectable Barricade Duty--always messy, that.)
New Re: Digs are fungible; wherever you go--there You are.
Yep. "Home is where you park it."

Only yesterday talked to a couple that did that for 10 years.
Alex

"There is a cult of ignorance in the United States, and there has always been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge."

-- Isaac Asimov
New Woke us up in the East Bay
Felt like one of the modest temblors we get in the Oakland Hills, but as I said to L at the time, "If that was in Eureka or in L.A., it was big." Reports suggest that in your neighborhood it was biggish. Glad you rode it through up near Ground Zero.

core-dially,
New Thanks for the reminder..
My comments here were rather flippantly Me-Me oriented; took a while longer to realize that (just as you say) what-IF the epi- Were S.F. again!?!

Mea culpa.. I no excuse for such troglodyte-dull perception :-/
New Up to 6.1 at the moment.
That's pretty big. I saw elsewhere that 50,000 were without power.

Here's hoping the damage isn't too bad, there are few injuries, and that it's not a pre-quake for something much larger... :-(

The 5.8 we got in 2011 was quite a surprise, and that was in the early afternoon. Having one in the very early morning must be quite disorienting!

Glad you're all Ok. Hang in there!

Cheers,
Scott.
New Slept through it
About 100 miles south. Glad those nearer weren't more inconvenienced.
     6.0 Earthquake: American Canyon ~18 mi from >Moi< - (Ashton) - (13)
         Just saw the news and figured it was close! - (a6l6e6x) - (8)
             Rodgers Creek Fault seems the perp to watch here.. - (Ashton) - (7)
                 OK, here are the USGS's simulations of a 7.2 quake. - (a6l6e6x) - (6)
                     Thanks for heads-up (I think..) 7 is no lucky number. - (Ashton) - (5)
                         OK. Biggest problem is that you will virtually get no warning. - (a6l6e6x) - (4)
                             And the speed of sound is faster in a solid (like the ground) -NT - (drook)
                             Lots of interesting physics in earthquakes. - (Another Scott)
                             Well, the Model picks a spot way S. as epicenter for this simulation. - (Ashton) - (1)
                                 Re: Digs are fungible; wherever you go--there You are. - (a6l6e6x)
         Woke us up in the East Bay - (rcareaga) - (1)
             Thanks for the reminder.. - (Ashton)
         Up to 6.1 at the moment. - (Another Scott)
         Slept through it - (gcareaga)

See. All my little jokes have layers upon layers.
59 ms