I was just playing around. I would think a 9.5 would be the end of Cali. I still remember the damage the Northridge caused and it wasn't even in the 7's. Which is worse a shallow quake or a deep quake? I figure I would get out of bed if I felt it. We have quakes here in AL every so often but they are never over 4. 
doubtful, maybe in big bear, stuff might have come off store shelves and maybe in some peoples houses, but even then, maybe not.
Johnny- Lets continue our discussion here since the other thread was locked. :frown:
Yeah.. that wasn't centered in Oregon though. Although we sure felt it here. It was a 6.8, up by Olympia. But it was ~30 miles under the ground, so the shockwaves really traveled far.
And yeah.. Mt. Hood is a very real danger. Did you know that the only mountain that hasn't erupted in the last 2000 years in the Cascade range of Oregon is Mt. Jefferson?
Yeah.. that wasn't centered in Oregon though. Although we sure felt it here. It was a 6.8, up by Olympia. But it was ~30 miles under the ground, so the shockwaves really traveled far.
And yeah.. Mt. Hood is a very real danger. Did you know that the only mountain that hasn't erupted in the last 2000 years in the Cascade range of Oregon is Mt. Jefferson?
Frequency of Occurrence of Earthquakes
Based on Observations since 1900
Descriptor Magnitude Average Annually
Great 8 and higher 1
Major 7 - 7.9 18
Strong 6 - 6.9 120
Moderate 5 - 5.9 800
Light 4 - 4.9 6,200 (estimated)
Minor 3 - 3.9 49,000 (estimated)
Very Minor < 3.0 Magnitude 2 - 3: about 1,000 per day
Magnitude 1 - 2: about 8,000 per day
Based on Observations since 1900
Descriptor Magnitude Average Annually
Great 8 and higher 1
Major 7 - 7.9 18
Strong 6 - 6.9 120
Moderate 5 - 5.9 800
Light 4 - 4.9 6,200 (estimated)
Minor 3 - 3.9 49,000 (estimated)
Very Minor < 3.0 Magnitude 2 - 3: about 1,000 per day
Magnitude 1 - 2: about 8,000 per day
Originally posted by: Millennium
I was just playing around. I would think a 9.5 would be the end of Cali. I still remember the damage the Northridge caused and it wasn't even in the 7's. Which is worse a shallow quake or a deep quake? I figure I would get out of bed if I felt it. We have quakes here in AL every so often but they are never over 4.
I think a shallow quake causes more damage. The shockwaves are much more violent, compared to deeper.. where they are allowed to spread out more.
The 6.8 that happened in Washington 2/28/2001 was realitivly large, and it did cause some significant damage.. but it woul have been much worse if it was not so far underground.
It was felt as far away as San Francisco and Salt Lake City. It actually registered around the world.
Originally posted by: Eli
Originally posted by: Millennium
I was just playing around. I would think a 9.5 would be the end of Cali. I still remember the damage the Northridge caused and it wasn't even in the 7's. Which is worse a shallow quake or a deep quake? I figure I would get out of bed if I felt it. We have quakes here in AL every so often but they are never over 4.
I think a shallow quake causes more damage. The shockwaves are much more violent, compared to deeper.. where they are allowed to spread out more.
The 6.8 that happened in Washington 2/28/2001 was realitivly large, and did cause some significant damage.. but it woul have been much worse if it was not so far underground.
The last one here that was widely felt was in NE AL and was a 3.8 or something. They do not happen very often though. Now my parents lived in Washington and Oregon for a little while and they felt a few while they were up there.
Originally posted by: Millennium
I was just playing around. I would think a 9.5 would be the end of Cali. I still remember the damage the Northridge caused and it wasn't even in the 7's. Which is worse a shallow quake or a deep quake? I figure I would get out of bed if I felt it. We have quakes here in AL every so often but they are never over 4.
Shallow ones are worse iirc, because the closer they are to the surface, the less "earth" there is to absorb it and spread the shock around, and it's just more power that gets dispersed topside. Most earthquakes are a couple of miles below the surface or more.
At the time that one occured I lived about 45 min north of Vancouver, felt it very well... it woke me up from a Graveyard shift workers type of sleep.
Did not know that about the Cascades, interesting though.
Would definitly not want to see the destruction caused if Hood erupted even half as much as St. Helens did.
It's just too close... especially if it points in MY direction (NW):Q
Did not know that about the Cascades, interesting though.
Would definitly not want to see the destruction caused if Hood erupted even half as much as St. Helens did.
It's just too close... especially if it points in MY direction (NW):Q
Originally posted by: Millennium
Originally posted by: Eli
Originally posted by: Millennium
I was just playing around. I would think a 9.5 would be the end of Cali. I still remember the damage the Northridge caused and it wasn't even in the 7's. Which is worse a shallow quake or a deep quake? I figure I would get out of bed if I felt it. We have quakes here in AL every so often but they are never over 4.
I think a shallow quake causes more damage. The shockwaves are much more violent, compared to deeper.. where they are allowed to spread out more.
The 6.8 that happened in Washington 2/28/2001 was realitivly large, and did cause some significant damage.. but it woul have been much worse if it was not so far underground.
The last one here that was widely felt was in NE AL and was a 3.8 or something. They do not happen very often though. Now my parents lived in Washington and Oregon for a little while and they felt a few while they were up there.
Yeah. We get them..
The Juan De Fuca plate is subducting under the North American plate all around here.
Yeah. We get them..
The Juan De Fuca plate is subducting under the North American plate all around here.
he said subducting
The Juan De Fuca plate is subducting under the North American plate all around here.
he said subducting
I've heard that St. Helens has been making another stir... but it's been a little while since I heard it. There is also Adams.
Yeah.. It would really do some damage if it blew to the West in the way Mt. St. Helens did.
Think about it though. We had Mt. St. Helens blow its top.. And then we have Crater Lake. Even though that happened 7,000 years ago, it was the largest known eruption in the Cascades. Think of the hole it left in the ground. :Q At least there is still 3/4 of Mt. St. Helens left... lol.
Mt. Jefferson hasn't erupted in the last 50,000 years. Mt. Hood's last eruption was 1865.
Mt. Hood has yearly seismic swarms...
I haven't heard much about Adams. Rainier has been in the news, though. It had a very small fit in 1882, and there was some significant seismic activity a couple of years back.
We live amongst giant time bombs. :Q
kind of happy socal doesn't have any volcanoes in socal. I think shasta is one, but nothing this far down, unless the La Break Tarpits decide to start spewing [dr evil]liquid hot magma[/dr evil] like in that dumb movie.
Timebombs...that's for certain...
But how are things down there in Cali, Frontline?
Any more news about the surroundings?
Any big aftershocks?
But how are things down there in Cali, Frontline?
Any more news about the surroundings?
Any big aftershocks?
Well yeah... but like half of your state could fall into the Pacific if a big enough one hit right???
Eli-
Where are you GETTING your information???
Wait...lemme guess... you are a USGS worker, or something like that
Where are you GETTING your information???
Wait...lemme guess... you are a USGS worker, or something like that
I'm not fronline, since we have the same icon, I'll answer for him
tons of little ones according to the webpage, scroll down [l]http://www.scecdc.scec.org:3128/recenteqs/Maps/117-34.html[/l]
I haven't turned the TV on to see if any of the national news channels have anything.
Well I hope there are no injuries more serious than bumps and bruises... and no major damage there
I'm going to bed now.... later Eli
I'm going to bed now.... later Eli
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