NGA EAST gound motion

[Srijit Bandyopadhyay]

Dear all, I am performing PSHA in India location. I have used NGA EAST ground motions.

Bur I getting very PGA value in few GMPEs like AB95, AB14,AB04, BDC02, YA15  etc. The hazard value observed by other GMPEs are less.

I think I made mistake in assign std dev values.

Kindly let me, so that  I can able to rectify my mistakes.

 The variation of PGA with different GMPEs are great.

PGA value variation.

0.987882200000000 0.552121600000000 0.805546200000000 0.559814600000000 0.610689000000000 0.835359000000000 0.535976500000000 0.641740400000000 0.390704700000000 0.341235000000000 0.369115100000000 0.332893500000000 0.261209800000000 0.377510000000000 0.353995200000000 0.865628200000000 0.603712600000000

[Marco Pagani]

Thanks. Sorry, would you mind explaining more clearly your problem.

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[Srijit Bandyopadhyay]

Hi, 

I am performing PSHA analysis in the Peninsula India region. During analysis, I am considering NGA East 17 attenuation relationships. Here, I am facing the following issues. 

I am using USGS_ NGA_GMPE tables. 

Some of the attenuation relationships (AB95, AB14, AB04, BDC02, YA15 ) show very high hazard value in any return period. While the rest of the attenuations show comparatively less PGA values. 

For example, AB14 shows a Pga value of 0.97g for RP 10000 years, whereas the 1CCSV attenuation relationship shows a PGA value of 0.35 g. 

Should I mention anything in the input file during the job description? 

VS value is 2500 m/s

All the relevant  files are uploaded for reference.

Did I 

With regards

Srijit 

To view this discussion on the web visit https://groups.google.com/d/msgid/openquake-users/EE969F65-6F19-48BF-B5B5-69A466B736BD%40globalquakemodel.org.

[Srijit Bandyopadhyay]

Hi, 

I am performing PSHA analysis in Peninsula India region. During analysis I am considering NGA East 17 attenuation relationships. Here, I am facing the following issues. 

I am using USGS_ NGA_GMPE tables. 

Some of the attenuation relationships (AB95, AB14,AB04, BDC02, YA15 ) shows very high hazard value in any return periods. While rest of the other attenuations shows comparatively less PGA values. 

For example AB14 shows Pga value 0.97g for RP 10000 years, whereas 1CCSV attenuation relationship shows PGA value 0.35 g. 

Should I mention anything in the input file during job description. 

VS value is 2500 m/s

With regards

Srijit 

To view this discussion on the web visit https://groups.google.com/d/msgid/openquake-users/EE969F65-6F19-48BF-B5B5-69A466B736BD%40globalquakemodel.org.

[Peter Pažák]

Hi, the variation of PGA from GMPE to GMPE does not seem to be that different, 0.97g - 0.35g range seems quite OK...

Peter

Dátum: utorok 19. septembra 2023, čas: 22:36:52 UTC+2, odosielateľ: srij...@gmail.com