|
|
Joined: Dec 2006
Posts: 28,172
Campfire Ranger
|
Campfire Ranger
Joined: Dec 2006
Posts: 28,172 |
FWIW, the Richter scale of magnitude is no longer used.
Richter only goes to 10. Seismologists believe a quake of greater than 10 magnitude is possible.
Moment magnitude is similar. Thanks IB. After studying a bit I can see where the Moment of Magnitude scale more accurately measures the quakes energy. The scales are similar but different. The MofM scale would more accurately measure Big Ones.
Last edited by luv2safari; 01/28/20.
Hunt with Class and Classics
Religion: A founder of The Church of Spray and Pray
Acquit v. t. To render a judgment in a murder case in San Francisco... EQUAL, adj. As bad as something else. Ambrose Bierce “The Devil's Dictionary”
|
|
|
|
|
Joined: Dec 2008
Posts: 8,292
Campfire Outfitter
|
Campfire Outfitter
Joined: Dec 2008
Posts: 8,292 |
72 miles off the coast (good thing) tsunami warning
I'm not an expert, but if a wave travels let say 5MPH, that would be on shore in about 15 minute ????????
"Life is tough, even tougher if your stupid"
John Wayne
|
|
|
|
|
Joined: Jan 2005
Posts: 12,359
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Jan 2005
Posts: 12,359 |
72 miles off the coast (good thing) tsunami warning
I'm not an expert, but if a wave travels let say 5MPH, that would be on shore in about 15 minute ???????? I think the wave can move hundreds of miles per hour in the open ocean.
|
|
|
|
|
Joined: Nov 2018
Posts: 16,895
Campfire Ranger
|
|
Campfire Ranger
Joined: Nov 2018
Posts: 16,895 |
|
|
|
|
|
Joined: May 2003
Posts: 31,220
Campfire 'Bwana
|
|
OP
Campfire 'Bwana
Joined: May 2003
Posts: 31,220 |
The tidal effect I refer to is not the movement of water, but movement of the earth's crust. The gravitational pull of the sun and moon (combined at the full and new moons) is strong enough to lift trillions of tons of water, and we know it has an equal pull on the earth's crust. The crust bulges in a wave-like pattern as the globe turns under the aligned sun and moon. How much movement is needed to trigger a 'quake if the fault is already cocked to go? Nor does it have to happen at the moment of full tide. That moment may trigger a very small change, but that change ripples and grows until the fault snaps a day or two (and several more almost equal tides) later.
Cleverly disguised as a responsible adult.
|
|
|
|
|
Joined: May 2012
Posts: 1,417
Campfire Regular
|
|
Campfire Regular
Joined: May 2012
Posts: 1,417 |
When I heard about this I got my baggies on and my surfboard ready. So far my feet are still dry. In all seriousness, the chance of having any sizable wave action here in Southeast FL is pretty much non-existant. We are blocked from seismic waves from that area by both Cuba and the Continental shelf. Off to our east are the Cay Sal and Bahama Banks, so we are blocked from wrap around waves there too, which is why the surfing here sucks until you get a lot farther up coast. Hopefully the folks on the Jamaica coast didn’t have any significant damage either.
|
|
|
|
|
Joined: May 2012
Posts: 1,417
Campfire Regular
|
|
Campfire Regular
Joined: May 2012
Posts: 1,417 |
72 miles off the coast (good thing) tsunami warning
I'm not an expert, but if a wave travels let say 5MPH, that would be on shore in about 15 minute ???????? I think the wave can move hundreds of miles per hour in the open ocean. True. Seismic waves can travel close to the speed of sound through open ocean water.
Last edited by Capt_Craig; 01/28/20.
|
|
|
|
|
Joined: Sep 2011
Posts: 44,970
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Sep 2011
Posts: 44,970 |
The tidal effect I refer to is not the movement of water, but movement of the earth's crust. The gravitational pull of the sun and moon (combined at the full and new moons) is strong enough to lift trillions of tons of water, and we know it has an equal pull on the earth's crust. The crust bulges in a wave-like pattern as the globe turns under the aligned sun and moon. How much movement is needed to trigger a 'quake if the fault is already cocked to go? Nor does it have to happen at the moment of full tide. That moment may trigger a very small change, but that change ripples and grows until the fault snaps a day or two (and several more almost equal tides) later. Interesting points Rocky, combination of water being moved off the fault, the earth itself being pulled around, and the stressors already in place. Science is cool. Geno
The desert is a true treasure for him who seeks refuge from men and the evil of men.
In it is contentment
In it is death and all you seek
(Quoted from "The Bleeding of the Stone" Ibrahim Al-Koni)
member of the cabal of dysfunctional squirrels?
|
|
|
|
|
Joined: Nov 2003
Posts: 67,667
Campfire Kahuna
|
Campfire Kahuna
Joined: Nov 2003
Posts: 67,667 |
Wow, right between Cuba and Jamaica. What a great opportunity!
Sam......
|
|
|
|
|
Joined: Oct 2004
Posts: 2,052
Campfire Regular
|
|
Campfire Regular
Joined: Oct 2004
Posts: 2,052 |
Another opportunity for the Clinton Foundation?
And these zombies line up and eat from the media’s trough
Cowards CANNOT be free. Nor should they be.
~Molɔ̀ːn Labé Skýla~
|
|
|
|
|
Joined: Dec 2005
Posts: 40,179
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Dec 2005
Posts: 40,179 |
Another opportunity for the Clinton Foundation? All those orphans for the sex trade
Son of a liberal: " What did you do in the War On Terror, Daddy?"
Liberal father: " I fought the Americans, along with all the other liberals."
MOLON LABE
|
|
|
|
|
Joined: Dec 2008
Posts: 8,292
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Dec 2008
Posts: 8,292 |
72 miles off the coast (good thing) tsunami warning
I'm not an expert, but if a wave travels let say 5MPH, that would be on shore in about 15 minute ???????? I think the wave can move hundreds of miles per hour in the open ocean. True. Seismic waves can travel close to the speed of sound through open ocean water. They quote 500 MPH for Tsunami in the link below, slowing to 20-30 MPH near shore. That's faster than I though ...  https://www.tsunami.gov/?page=tsunamiFAQ
"Life is tough, even tougher if your stupid"
John Wayne
|
|
|
|
|
Joined: Jan 2005
Posts: 12,359
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Jan 2005
Posts: 12,359 |
a lot of earthquakes do not actually generate a tsunami, but better safe than sorry.
|
|
|
|
|
Joined: Jan 2018
Posts: 23,506
Campfire Ranger
|
|
Campfire Ranger
Joined: Jan 2018
Posts: 23,506 |
Cascadia Fault Line...When this subsections decides to heavho...Shît gonna get real sporty for those of us on the coast...😎
Curiosity Killed the Cat & The Prairie Dog
“Molon Labe”
|
|
|
|
|
Joined: May 2003
Posts: 31,220
Campfire 'Bwana
|
|
OP
Campfire 'Bwana
Joined: May 2003
Posts: 31,220 |
Yes it is, Beav. Faults that break with horizontal movement don't generate tsunamis. Those that shift vertically, with either a rise or drop of the sea floor, do. So can underwater landslides with or without a 'quake.
Cleverly disguised as a responsible adult.
|
|
|
|
|
Joined: Jan 2012
Posts: 66,765
Campfire Kahuna
|
|
Campfire Kahuna
Joined: Jan 2012
Posts: 66,765 |
In the 18th century Port au Prince Haiti was virtually destroyed by an estimated 8.0 earthquake! The first 2 of the 3 Little Pigs didn’t exercise good building practices. 😃 And PoP has a shallow fault. A 5 something got them pretty good few short years back.
|
|
|
|
|
Joined: Aug 2011
Posts: 8,723
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Aug 2011
Posts: 8,723 |
Shakin in Miami too
Last edited by TBREW401; 01/28/20.
|
|
|
|
|
Joined: Jan 2005
Posts: 12,359
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Jan 2005
Posts: 12,359 |
Yes it is, Beav. Faults that break with horizontal movement don't generate tsunamis. Those that shift vertically, with either a rise or drop of the sea floor, do. So can underwater landslides with or without a 'quake. Yes, search Lituya Bay 1958 for a big one!
|
|
|
|
|
Joined: Jun 2006
Posts: 45,996
Campfire 'Bwana
|
|
Campfire 'Bwana
Joined: Jun 2006
Posts: 45,996 |
Wow, right between Cuba and Jamaica. What a great opportunity! I don't follow.
A wise man is frequently humbled.
|
|
|
|
|
Joined: Dec 2008
Posts: 8,292
Campfire Outfitter
|
|
Campfire Outfitter
Joined: Dec 2008
Posts: 8,292 |
Cascadia Fault Line...When this subsections decides to heavho...Shît gonna get real sporty for those of us on the coast...😎 I used to have a place north of Tillamook, they said we had about 5 minutes to get up high when that one goes. Now I live just North of a super volcano .. so there is that 
"Life is tough, even tougher if your stupid"
John Wayne
|
|
|
|
|
565 members (2003and2013, 10Glocks, 222Sako, 163bc, 16Racing, 1badf350, 62 invisible),
2,551
guests, and
1,337
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
Forums81
Topics1,190,674
Posts18,456,132
Members73,909
| |
Most Online11,491
Jul 7th, 2023
|
|
|
|
