Ground Motion Records

[NMTJ]

Hello. I need to obtain ground motion records on the bedrock. The records in the website of PPER "

https://ngawest2.berkeley.edu/"

are on the ground surface. How can get them on the bedrock? Because I want to model a structure with underneath soil that should apply earthquake on the bedrock. Thanks

 

[Liam Nesson]

Probably better question for a geotech.

Not too sure what you are trying to achieve but a site class A is for a hard rock site. So could you just apply site class A to the ground accelerations provided?

 

[JoshPlumSE]

How would this type of record have been obtained?

You think there are places where people have drilled down to bedrock and installed accelerometers? The only true ground records that I know of are the PPER one. Measured at the locations where they have good instrumentation.