Where can i find the response spectra of the GMs that were used in the last edition of SDC – San Francisco 2023? (mentioned in the Design Guide)

The response spectrum are generally not disclosed from the SLC. However if you have the ground motion data, you can use some software or online tool to generate the response spectrum for your reference.

We created (scaled spectra:all record TotD100 graph) but when we write the values to table on NHR3, we find these headings different from the value found in the selection guide report. 1) Recommended Scale Factor 2) Mean Squared Error. Is it a problem?

Headings are different: ground motions guide is a guide. Use engineering judgment and be able to justify your reasoning.

When following the ground motion selection guide, the values resulting from one step are then used as inputs in the next step. Should we be using the values that are shown in the selection guide as inputs in the next step, or the values we get from the various websites? I ask because these are for some reason different. For example, the USGS disaggregation tool, when given the exact parameters shown in the selection guide, produces different results (i.e. distance = 66.85 km, not 50.33 km). Then, when searching through NGA-West2, the selection guide suggests to filter the distance to 50.33 km +/- 20 km = [30.33,70.33] km. Restating the question, should we use this value, or 66.85 km +/- 20 km = [46.85,86.85] km? Thank you!

The ground motion selection guide is provided as reference. Please use the values from the platform for your own selection. If you have trouble finding a suitable ground motion set with these new values, then use the values from the guide and state the reasons why you did not use the exact values.