rotational components

[ouazir]

how to calculate the rotation accelerogram from those of translations (rotation components of an earthquake for the X and Y axes)?

[huffte]

While this question is completely outside the realm of the intent of this forum (questions regarding SeismoSoft and its software), I'll suggest you start with the following:

https://www.buffalo.edu/mceer/catalog.h ... etail.html

I hope it helps.