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In AD 132, Zhang Heng of China's Han dynasty invented the first seismoscope (by the definition above), which was called Houfeng Didong Yi (literally, "instrument for measuring the seasonal winds and the movements of the Earth"). The description we have, from the History of the Later Han Dynasty, says that it was a large bronze vessel, about 2 meters in diameter; at eight points around the top were dragon's heads holding bronze balls. When there was an earthquake, one of the mouths would open and drop its ball into a bronze toad at the base, making a sound and supposedly showing the direction of the earthquake. On at least one occasion, probably at the time of a large earthquake in Gansu in AD 143, the seismoscope indicated an earthquake even though one was not felt. The available text says that inside the vessel was a central column that could move along eight tracks; this is thought to refer to a pendulum, though it is not known exactly how this was linked to a mechanism that would open only one dragon's mouth. The first ever earthquake recorded by this seismograph was supposedly somewhere in the east. Days later, a rider from the east reported this earthquake.[3][4]
Originally posted by steve95988
I really hope no one listens to ur warning, the more people lost in this disaster will be a world better off, californians are the root of idiots
Originally posted by samlf3rd
reply to post by svendutch
YES YOU SHOULD! Stop raising insurance premiums by living on coasts and acting like "WE never thought the Volcano could blow da he..." C'mon seriously.
Everyone should move (not all the way across the world in some other area of disaster) away from Volcano's, and Large Fault Lines, and Low Lying coastal and river regions.
You cannot see the seismic difference between California, and Mexico, and Iceland? I'm sorry California looks like a bingo card with chips falling- in no order-randomly-waiting for the next big one.
Originally posted by TKDRL
reply to post by graphuto
Yeah that is easy for someone who is single, and can live in a car or tent or something. Not everyone has it that easy.... Some people have kids, elderly parents etc.
Originally posted by steve95988
I really hope no one listens to ur warning, the more people lost in this disaster will be a world better off, californians are the root of idiots