if we see the waveform of an event their seismogram display No. of counts vertically instead of amplitude in mm. my question is this how we can get the amplitude for calculation of seismic energy? how these counts will be convert into mm for maximum amplitude? plz all research give the answer. what is interpretation of this seismogram plz.
“Counts” is the raw number read off the physical instrument, ie. the voltage read from a sensor. @iris https://ds.iris.edu/ds/support/faq/6/what-is-a-count-in-timeseries-data/
You Have to do simple Scaling Operation
i.e.
Scale : 3.27508E9 counts = 1 unit ScaleFreq : 0.02 Hz = this is the frequency at which the scale is accurate Scale Units : 1 unit = 1 M/S (meter/second) SampleRate: 20.0 samples/sec
And This Depends on the data at hand.
So, a “count” value of 3.27508e9 would indicate ground motion of 1 m/s — you can divide the count value by 3.27508e9 to convert into meters per second.
wish this helps.
Thanks Hameedy, sir i have understand answers from both of you and kaseniia. now my question is that for the calculation Ms how we can obtained amplitude in mm from this seismogram, because according to the kanamori and Gutenberg Ms calculated using maximum amplitude of the surface wave. ?
please explain this?
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