Need guidance for running okapy_forward_model.ipynb

[dalalprohelika]

" # a vector of fault parameters: strike, dip, rake, slip, x, y, length, top, bottom
fparams = np.array([60, 90, 5, 2, 495000, 4238000, 35000, 4000, 12000]) # all values in degrees or m "

What are the parameters defined by x, y, length, top, bottom?How to derive them?