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Originally posted by Chrisfishenstein
I really wish people would explain what the hell the graph means for us non earthquake graph readers!! I am really interested in this stuff but you might as well just put up alien text for me to interpret for you.
Originally posted by underduck
Originally posted by Phage
There were a series of 6+ aftershocks from the Japan earthquake beginning at 07:18 with much activity at 5.5+. There was also a 6.0 on the mid-Atlantic ridge.
It would appear that the activity coincides with that activity.
Would that activity explain a graph like this?
Vault Conditions: The vault lies below an apartment complex. The concrete pier is isolated from the floor.
Seismograph is another Greek term from seismós and γράφω, gráphō, to draw. It is often used to mean seismometer, though it is more applicable to the older instruments in which the measuring and recording of ground motion were combined than to modern systems, in which these functions are separated.
Not all the wiggles on a seismogram are due to an earthquake. For example, cars passing by seismometers can producer ground vibrations. The electrical signals fromt the seismometers are sent over FM radio so electro-magnetic interference can show up on the seismogram. Man-made blasts (from mining activity) can also be picked up on the seismometer
Originally posted by mileslong54
Originally posted by Chrisfishenstein
I really wish people would explain what the hell the graph means for us non earthquake graph readers!! I am really interested in this stuff but you might as well just put up alien text for me to interpret for you.
Lots of black lines arching high = Bad
Straight line = Good