180 Deg Slip/Strike Eq in SoCal???, page 4
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reply posted on 4-10-2009 @ 10:23 AM by Elliot
reply to post by Lil Drummerboy

ft.c om link

I know that this particular geologist has not come onto ATS to say this but you might find his 'views' interesting as to what to expect next.....or what is expected next from experts.




mod edit, attempt to fix link

[edit on 4-10-2009 by DontTreadOnMe]


reply posted on 4-10-2009 @ 10:28 AM by geo1066
reply to post by Elliot


Thanks for the link but all I got was a 'Log in' page. Can you correct or quote?



Never mind. you beat me to it. Thanks

[edit on 4-10-2009 by geo1066]


reply posted on 4-10-2009 @ 10:31 AM by Lil Drummerboy
www.quakeprediction.com... here is another source for you if you like. What I am gettin at here is gettin the panties in a bunch has proven to be nothing but uncomfortable.


reply posted on 4-10-2009 @ 11:39 AM by liveandletlive
So, Im stupid and dont know anything about earthquakes but on the usgs world map it appears that most of the earthquakes lately are around the ring of fire. If Western and Eastern California are pulling away from each other or "tearing in two" and with the recent activity in the western Pacific, wouldnt that indicate that the Pacific plate is moving West?

en.wikipedia.org...

Megathrust earthquakes occur at subduction zones at destructive plate boundaries (convergent boundaries), where one tectonic plate is forced (or subducts) under another. Due to the shallow dip of the plate boundary, which causes large sections to get stuck, these earthquakes are among the world's largest, with moment magnitudes (Mw) that can exceed 9.0. During the rupture one side of the fault is pushed upwards relative to the other, and it is this type of movement that is known as thrust.[1]

The major subduction zone is associated with the Pacific and Indian Oceans and are responsible for the volcanic activity associated with the Pacific Ring of Fire. Since these earthquakes deform the ocean floor, they almost always generate a significant series of tsunami waves. They are known to produce intense shaking for long periods, such as several minutes.

Edit to Add:
Since 1900, all five earthquakes of magnitude 9.0 or greater have been megathrust earthquakes, in fact, no other type of known earthquake can produce earthquakes of this scale.



[edit on 4-10-2009 by liveandletlive]



reply posted on 4-10-2009 @ 12:47 PM by TrueAmerican
After checking out the CI.CWC station carefully across all three channels, BHN, BHE and BHZ, my personal opinion for the moment is that those channels at that station are probably messed up.

There are several reasons I will give for this:

1) First order of business is always get confirmation from nearby stations if you observe any weirdness going on. And to that effect, a close by station is CI.MPM, and there is no such BHE or BHN 180 degree movement like that occurring. That's reason enough to suspect something is up with CI.CWC.

2) I have a considerable bit of experience monitoring stations in CA with GEE, and I can tell you that this phenomena is not at all uncommon. In fact, if I flipped every time I saw something like this in GEE, I'd be in a mental hospital by now, and possibly dragging a few of you with me.

3) Amplitude is critical. The ground is always moving to a very small degree everywhere. And the observed amplitude of these movements you are seeing is very very small. So small it is really insignificant, even if the BHE and BHN channels at CI.CWC WERE working properly.

So in summary we have no corroboration from nearby stations, the amplitude is insignificant, and it's nothing I haven't seen before in that area. So what does all this mean?

IMO, absolutely nothing. But of course, an earthquake can happen any time, anywhere, no telling. There is always that chance. Does this observation at CI.CWC increase that chance, or is there something to worry about? IMO, not at all. Not even a little bit any more than normal. Hope that helps, and it just my lowly opinion. I'm surprised some other GEE watchers around here haven't chimed in to this effect. Hmm.


reply posted on 4-10-2009 @ 01:33 PM by Hx3_1963
reply to post by TrueAmerican
There is a chance that the readings are incorrect, but, I did see out of phase movement on 2 other stations last night as well...

They were not as large, due to the distance involved but appeared none the less...

My OP was not meant to instill panic or doom...I was just trying to rationalize this continued swarm and try to explain what IMHO I was seeing...

Probably nothing as noted...but a teaching moment none the less...

Also notice the Samoa ridge/subduction zone...how it ~appears~ to point right at SW US Coast...Wave Propagation/Direction???

map 1.2 2009/10/04 10:35:40 35.640N 120.937W 5.2 12 km ( 7 mi) SSW of Lake Nacimiento, CA
map 2.0 2009/10/04 10:17:47 36.396N 117.856W 3.3 10 km ( 6 mi) S of Keeler, CA
map 1.2 2009/10/04 10:12:18 35.640N 120.935W 5.4 12 km ( 7 mi) SSW of Lake Nacimiento, CA
map 1.3 2009/10/04 10:10:45 33.275N 116.776W 13.1 4 km ( 3 mi) NNW of Lake Henshaw, CA
map 2.7 2009/10/04 09:47:28 36.380N 117.852W 3.9 12 km ( 8 mi) S of Keeler, CA
map 1.6 2009/10/04 09:17:10 36.391N 117.865W 4.4 11 km ( 7 mi) S of Keeler, CA
map 2.3 2009/10/04 09:08:51 38.816N 122.812W 3.6 2 km ( 1 mi) NNW of The Geysers, CA
map 2.7 2009/10/04 08:56:42 35.642N 120.939W 5.2 12 km ( 7 mi) SSW of Lake Nacimiento, CA
map 1.8 2009/10/04 08:44:22 36.383N 117.882W 4.2 12 km ( 7 mi) S of Keeler, CA
map 1.4 2009/10/04 08:38:34 37.532N 118.830W 7.4 14 km ( 8 mi) WSW of Toms Place, CA
map 2.8 2009/10/04 08:35:23 39.397N 122.902W 8.0 5 km ( 3 mi) ESE of Lake Pillsbury, CA
map 1.6 2009/10/04 08:24:33 36.087N 117.910W 4.9 6 km ( 4 mi) NE of Coso Junction, CA
map 2.9 2009/10/04 08:03:52 36.100N 117.903W 3.5 7 km ( 5 mi) NNE of Coso Junction, CA
map 2.8 2009/10/04 07:54:51 36.406N 117.853W 5.7 9 km ( 6 mi) S of Keeler, CA
map 0.4 2009/10/04 07:44:45 38.842N 122.774W 2.3 5 km ( 3 mi) W of Cobb, CA
map 1.9 2009/10/04 07:40:03 36.457N 121.023W 4.4 14 km ( 8 mi) SE of Pinnacles, CA
map 1.8 2009/10/04 07:30:31 32.812N 115.850W 17.5 15 km ( 9 mi) W of Seeley, CA
MAP 3.0 2009/10/04 07:19:09 32.941N 115.731W 16.1 15 km ( 9 mi) SW of Westmorland, CA

[edit on 10/4/2009 by Hx3_1963]


reply posted on 4-10-2009 @ 01:59 PM by Hx3_1963
reply to post by TrueAmerican
Now that was a well thought reply!

Indeed...I speak of a learning experience and then almost miss out on one

So you didn't notice any out of phase displays on other close stations last night?

I wish I'd taken more screen shot to illustrate this better...

And here's a nice little page...

Live Internet Seismic Server
aslwww.cr.usgs.gov...


reply posted on 4-10-2009 @ 02:08 PM by TrueAmerican
Originally posted by Hx3_1963
reply to post by TrueAmerican
Now that was a well thought reply!

Indeed...I speak of a learning experience and then almost miss out on one

So you didn't notice any out of phase displays on other close stations last night?

I wish I'd taken more screen shot to illustrate this better...

And here's a nice little page...

Live Internet Seismic Server
aslwww.cr.usgs.gov...


I wasn't monitoring CA last night, so no. And besides, right now I am more concerned with what's happening out in Samoa/Tonga/New Guinea/Fiji area. But you know mother earth, hehe, watch one place, and they always occur in another it seems.

But if you ever capture an nice size one, you can upload it to the GEE screenshots thread I got going somewhere around here. Hang on... here:

www.abovetopsecret.com...

You can see some of the ones I captured live on that thread. And I post most of them before the USGS or the Firefox plugin notifies us of the quake. Kinda fun, I suppose, trying to guess the magnitude and then see the USGS result.
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