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Oh yes and our houses are made of bricks so they are harder to shake down. People should learn from the three little pigs.
BTW JimBob, Re. "It can cause lives so it is quite luck no one died."Actually, it's a different sort of "the earth moved" event that's associated with causing lives.
The comment about the 3 little pigs is proably more apropriate when thinking about tornado damage.
Jimbob, Read what you actually wrote."It can cause lives"As I said, it's something else that does that.Masonry does fall down in earthquakes, but it does a better job than timber when it comes to stopping flying debris so it's good to hide behind in a tornado. Of course, if it falls on you you are in big trouble but while it stands it's good stuff.I seem to remember hearing somewhere that "earthquakes don't kill people- buildings do".
"There is no rational explanation for the subjective experience. "Surely distance from the epicenter would explain why some seem bigger than others?
Both types of quakes produce the same amount of side-to-side and vertical waves surface waves. They are know as S-waves and P-waves. There is no rational explanation for the subjective experience. It just is.
"There is no rational explanation for the subjective experience. "Surely distance from the epicentre would explain why some seem bigger than others?
My fiance and I live approximately 45 miles from the epicentre, in Nottingham, UK and we experienced a lot of movement. Our old precast concrete garage attached the house made the most tremendous amount of rattling during the tremor. Only of course to reinforce my plans to demolish it and build a new blockwork one! ha ha! I was quite amazed at how much movement we experienced. However, you folks in the states are obviously accustom to such events and I can only assume that you're are having a little chuckle at our mere tremor! ha ha ha! My first experience I may add though.
In todays Guardian it says for each whole number increase on the Richter scale represents a tremor 31 more times powerful than the last. My husband thought it would be 10 times more powerful. Could anyone put him right.
The Richter magnitude scale, or more correctly local magnitude ML scale, assigns a single number to quantify the amount of seismic energy released by an earthquake. It is a base-10 logarithmic scale obtained by calculating the logarithm of the combined horizontal amplitude of the largest displacement from zero on a Wood-Anderson torsion seismometer output. The effective limit of measurement for local magnitude is about ML=6.8. The energy release of an earthquake scales with the 3/2 power of the shaking amplitude, and thus a difference in magnitude of 1.0 is equivalent to a factor of 31.6 in the energy released; a difference of magnitude of 2.0 is equivalent to a factor of 1000 in the energy released.The Richter magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs (adjustments are included to compensate for the variation in the distance between the various seismographs and the epicenter of the earthquake). Because of the logarithmic basis of the scale, each whole number increase in magnitude represents a tenfold increase in measured amplitude; in terms of energy, each whole number increase corresponds to an increase of about 31.6 times the amount of energy released.
"these means that a magnitude 5 is 100000 more powerful than a 1"Er, no it doesn't. Each quake number has 10 times the amplitude of the one below not 10 time the power. I'm guessing the the velocity of the wave is prety much independdent of the released energy. That means that a change of 1 unit gives 10 times the apmlitude and so takes roughly 10 times as long. But it dissipates 31.6 times as much energy in that time so it has about 3.16 times more power. A magnitude 5 quake would be about 316 times the power but I don't know how that relates to how much damage is done.
I like your answer Bored C but I hope you don't gloat as much as hubby. Be humble in your glory.Exodus, I just heard they have invented Sat Navs for zimmer frames so when senility takes over completely at least you can find your way home.