Mmin and Mmax in the source model input files

Niranjan Joshi

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Jan 19, 2023, 9:26:34 AM1/19/23

to OpenQuake Users

Hi,

I was trying to reproduce the results of ESHM20 for Sweden but am a bit confused with how the Mmin and Mmax parameters are implemented in the source model file.

For example, in the zone SEAS413 the source model input file has the following parameteres

However, the catalogue file has seven of its eight events below this minMag specified.

I was wondering how I should go about specifying minMag for my data? If my zone catalogue has a completeness magnitude of 1.0, should I specify that as my minMag? How does openquake use the minMag and maxMag parameters specified in the source model file?

Many thanks!

Joshi

Marco Pagani

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Jan 21, 2023, 11:30:35 AM1/21/23

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The mmin is not set using seismicity but is selected following engineering considerations. See for example https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=mmin+bommer+earthquake&btnG=

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Niranjan Joshi

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Feb 6, 2023, 8:55:47 AM2/6/23

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Thanks a lot for your reply! That paper clears up all questions I had, and provides more information on what I needed :D