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Started By
Message
Posted on 4/23/14 at 11:53 pm to lsu480
quote:
Right....and this clown is saying it would cause over 10,000 times as much damage!
No, tardnugget, I'm talking about the energy involved. Damage depends on a lot of other factors such as duration, proximity to infrastructure, and the crushing weight of your own stupidity.
Posted on 4/23/14 at 11:54 pm to cattus
They are the worst things ever. Even though I have lived over 10 years of my life in Southern California I still need to double my Xanax dose whenever I visit!
Posted on 4/23/14 at 11:54 pm to BRgetthenet
Just checked with my relative who lives near Seattle. They didn't feel anything there.
Posted on 4/23/14 at 11:54 pm to beaver
quote:
8.2
1960 Valdivia was a 9.5
Posted on 4/23/14 at 11:55 pm to Clames
quote:
No, tardnugget, I'm talking about the energy involved. Damage depends on a lot of other factors such as duration, proximity to infrastructure, and the crushing weight of your own stupidity.
Ya....I am stupid. How many earthquakes have you been in **** Boy?
Posted on 4/23/14 at 11:56 pm to lsu480
quote:
The magnitude scale is really comparing amplitudes of waves on a seismogram, not the STRENGTH (energy) of the quakes. So, a magnitude 8.7 is 794 times bigger than a 5.8 quake as measured on seismograms, but the 8.7 quake is about 23,000 times STRONGER than the 5.8! Since it is really the energy or strength that knocks down buildings, this is really the more important comparison. This means that it would take about 23,000 quakes of magnitude 5.8 to equal the energy released by one magnitude 8.7 event. Here's how we get that number:
One whole unit of magnitude represents approximately 32 times (actually 10**1.5 times) the energy, based on a long-standing empirical formula that says log(E) is proportional to 1.5M, where E is energy and M is magnitude. This means that a change of 0.1 in magnitude is about 1.4 times the energy release. Therefore, using the shortcut shown eartlier for the amplitude calculation, the energy is,
32 * 32 * 32 / 1.4 = 23,405 or about 23,000
The actual formula would be:
((10**1.5)**8.7)/((10**1.5)**5.8) = 10**(1.5*(8.7-5.8))
= 10**(1.5*2.9)
= 22,387
This explains why big quakes are so much more devastating than small ones. The amplitude ("size") differences are big enough, but the energy ("strength") differences are huge. The amplitude numbers are neater and a little easier to explain, which is why those are used more often in publications. But it's the energy that does the damage.
Earthquake calculator
LINK
A magnitude 9 earthquake is 1000 times bigger than a magnitude 6 earthquake on a seismogram, but is 31622.776 times stronger (energy release).
This post was edited on 4/23/14 at 11:56 pm
Posted on 4/23/14 at 11:56 pm to Jim Rockford
quote:
They didn't feel anything there.
Chillin by a fire, this thread was the first I heard of it.
Posted on 4/23/14 at 11:58 pm to lsu480
quote:
Ya....I am stupid. How many earthquakes have you been in **** Boy?
Enough to know what I'm talking about in explaining relative earthquake magnitudes. You are the only raging retard with a drumset here that read "damage" when the discussion was on relative power. Go take your pills.
Posted on 4/24/14 at 12:17 am to lsu480
quote:
I will homo
You most certainly will.
Posted on 4/24/14 at 12:19 am to Clames
Yup.....just like you will lick a ballsack!
Posted on 4/24/14 at 12:26 am to BRgetthenet
Nothing will come of it. We had a 7.5 last year and I think the wave was 6"
Posted on 4/24/14 at 12:49 am to RogerTheShrubber
The 7.5 on Easter here in SD was scurry.
Thought the house was gonna come down.
Very eerie feeling in the afterwards
Thought the house was gonna come down.
Very eerie feeling in the afterwards
Posted on 4/24/14 at 1:43 am to cattus
quote:
Chillin by a fire, this thread was the first I heard of it.
I didn't feel it either. Had some friends up near the Canadian border feel a slight sway, but most of them didn't have a clue that it happened.
Posted on 4/24/14 at 2:07 am to Clames
I live close to Vancouver. I felt nothing.
Posted on 4/24/14 at 2:34 am to RogerTheShrubber
quote:
Nothing will come of it. We had a 7.5 last year and I think the wave was 6"
But that was like 100x worse than the Northridge Earthquake !
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