 |
||
| · join · view topics · view or post blog · bookmark · post new topic · subscribe · | ||
Posted on 10/21/2009 6:08:30 PM PDT by The Magical Mischief Tour
There ya go.
As a EQ watcher I noticed that too.
Been having more activity up off the coast of the PNW.
Lotta lil pressure releases.
The area from Nicaragua to Panama along the Pacific is very active both volcanically and seismically.
Rick just went over me.
I’ve never seen a storm escorted over land that fast.
driving in panama city at the time of this I didn’t feel it, but not sure if felt in the city or not. I most certainly felt the 6.x quake north of colon this summer, worst shaking I have ever felt here.
What about the canal? Could it be badlly damaged by a quake?
Algore is not happy.
“What about the canal? Could it be badlly damaged by a quake?”
Well it belongs to China now.
I am kinda ignorant about such things, but let me ask anyway. The recent eq’s in the pacific seem to have triggered others. Is there anyway to know if more can be expected anytime soon further up the coast of CA? Please tell me no. lol
I’ve yet to see the downgrade you referred to anywhere.
It certainly seems as though the plates, they are moving. If you look at the vast area from Samoa to Indonesia, things are still shaking. If your interest is mostly in the US, look at Southern and Central California for very small quakes, 1.0 to 2.5, along the transverse fault area. Kind of spooky.
Actually, it is very likely that cracks form at right angles because mathematically, that is the most efficient way of intercepting the stress raiser in an advancing crack. (at least by Dugdale, Griffith, and Rice’s crack theories.)
Whenever a homogeneous and brittle material cracks, there is a zone of increased stress preceding the tip of the crack. (That’s consistent with why things crack continually in one direction along a shear plane.) When the tip of an advancing crack intercepts another crack at less than 90 degrees, there is some tendency for the crack to continue to travel. When it hits a 90 degree intercepting crack, there is a chance the advancing crack will halt and no longer present a dynamic cracking mechanism.
The other way is for the crack to intercept a surface such as a hole or circular crack. That is one reason Navy sailors drill holes in steel and ram cones into them to stop a sheet metal crack in a bulkhead.
|
||
| · join · view topics · view or post blog · bookmark · post new topic · subscribe · | ||
Soooo many people are buying homes in Panama. Obongo is making Panama a wealthy country. No wonder Trump built a new Trump Towers in Panama City. He follows the money.
A relative of ours lives in Panama City. They are fine there. The quake was apparently far away.
“Is there anyway to know if more can be expected anytime soon further up the coast of CA?”
Overdue.
Whenever a homogeneous and brittle material cracks, there is a zone of increased stress preceding the tip of the crack. (That’s consistent with why things crack continually in one direction along a shear plane.) When the tip of an advancing crack intercepts another crack at less than 90 degrees, there is some tendency for the crack to continue to travel. When it hits a 90 degree intercepting crack, there is a chance the advancing crack will halt and no longer present a dynamic cracking mechanism.
The other way is for the crack to intercept a surface such as a hole or circular crack. That is one reason Navy sailors drill holes in steel and ram cones into them to stop a sheet metal crack in a bulkhead.
Thanks, Cvengr for the explanation and your source. Appreciate you sharing your expertise. Best wishes.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.