Thread: Determining Maximum and Minimum Counts to Expect from an Instument

Started: 2022-05-03 13:05:41
Last activity: 2022-05-25 18:10:10
Hi there,

Is there a way I can find out what the maximum and minimum voltages that a specific sensor can produce are?

For example, I can go to the MetaAggregator and information about sensitivity and sampling rate:
http://ds.iris.edu/mda/II/ESK/00/BH1/?starttime=2017-01-29&endtime=2021-02-23

but I would like to know what the maximum and minimum 'Count' to expect from a specific instrument is (so that I may place it in a scale so that the values are focused but without it going out of range). I realize these vary with the instrument, but I cannot seem to find an easy way of locating this.

Apologies if I am missing something obvious. I am working on this from a design/data science standpoint and am not a professional seismologist (though I am gaining a lot of knowledge from this project).

All the best,
Jorge



Dr. Jorge Boehringer
Research Associate, Sonification Design and Aesthetics
Newcastle University
Newcastle upon Tyne
UK

Project RADICAL: https://projectradical.github.io/about/


Sonic Experimentalism:
https://www.jorgeboehringer.com/

Please note: I don't expect other people to work the same hours as I do, so please do not feel you should respond to this email outside of your normal working hours. Kind regards.

  • gillian@iris.washington.edu
    2022-05-25 18:10:10
    Dear Dr. Boehringer,

    There is not a simple way to determine the maximum and minimum count level; this is not captured routinely in the metadata that is stored at IRIS. However, for most modern digital systems these limits are usually so large that they are not useful as a fixed scale for plotting purposes (except in an instance where the sensor is very close to a very large earthquake). Because the scale of recorded signal varies so widely, solutions such as auto-scaling for plotting is popular. Can you tell us more about the problem that you are trying to solve?

    Best regards,
    Gillian Sharer
    IRIS DMC
08:52:06 v.22510d55