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Hi !!

Hope you all are doing well,

I would like to know if a specific seismometer can measure 1 micron/sec velocity. I have a few specs from the datasheet but I'm not a seismologist and am trying to figure out how to relate the specs to one another.
Hi Krishna you should have a look at these two sites.
https://ds.iris.edu/message-center/thread/280/
https://www.passcal.nmt.edu/content/inst...splacement

It will be dependent on the frequency of the signal so unless it the signal is in the passband of the seismometer then it becomes a bit more complicated.

Michelle
(7 Nov 2017 16:19)michelle_salmon Wrote: [ -> ]Hi Krishna you should have a look at these two sites.
https://ds.iris.edu/message-center/thread/280/
https://www.passcal.nmt.edu/content/inst...splacement

It will be dependent on the frequency of the signal so unless it the signal is in the passband of the seismometer then it becomes a bit more complicated.

Michelle


Hi @michelle, thanks for your answer, the 1st URL is not working, the 2nd URL i have seen it has got the information i was looking for.

Thanks once again.
(7 Nov 2017 16:19)michelle_salmon Wrote: [ -> ]Hi Krishna you should have a look at these two sites.
https://ds.iris.edu/message-center/thread/280/
https://www.passcal.nmt.edu/content/inst...splacement

It will be dependent on the frequency of the signal so unless it the signal is in the passband of the seismometer then it becomes a bit more complicated.

Michelle

Great Michelle! Thanks for sharing the second link - very useful. Frankly, I'm telling you that the first link is something that has value but I really don't understand what's that about Huh

Thank you!
(26 Oct 2017 23:33)krishna Wrote: [ -> ]Hi !!

Hope you all are doing well,

I would like to know if a specific seismometer can measure 1 micron/sec velocity. I have a few specs from the datasheet but I'm not a seismologist and am trying to figure out how to relate the specs to one another.

Hi,
It would be more productive if u pinned your specs here, so we can help you with calculations.
Seismometers are usually designed to record signals on a particular range of frequencies (or periods), so they are convenient to discuss devices based on the range of vibration frequencies, which they can detect. Thus, one way to mark a seismometer is to describe the range of vibrational frequencies, which they can detect. As a versus frequency, a plot of amplification is called an instrument reaction. A device is sensitive to vibration at frequencies, for which the "reaction" curve is relatively large. Five sample instrument response curves are shown below, the frequency is shown with the horizontal axis, the equal length (period = 1 / frequency) is shown with the top horizontal axis. The vertical axis shows the ground-motion amplification factor. more visit for click here :-http://www.traininginindia.co.in/seo-training-in-india/
The "Peak/Full" looks to be the dynamic range in physical units (i.e., volts) and the "Sensor dynamic range" is the same thing in normalized units (i.e., decibels above some background/reference value) at a specific frequency (there will be a complex transfer function describing the frequency response). I am guessing that the speeds involved here must be standardized, i.e., seismic waves at a given frequency propagate at a given speed (look up seismic wave dispersion relations).
I would like to know if a specific seismometer can measure 1 micron/sec velocity. I have a few specs from the datasheet but I'm not a seismologist and am trying to figure out how to relate the specs to one another.
(26 Oct 2017 23:33)krishna Wrote: [ -> ]Hi !!

Hope you all are doing well,

I would like to know if a specific seismometer can measure 1 micron/sec velocity. I have a few specs from the datasheet but I'm not a seismologist and am trying to figure out how to relate the specs to one another.

Hi spec sheets are often hard to read I would suggest you let us know what sort of seismometer it is and then we might be able to help.
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