Dear, R-CRISIS Team

I have an error in seismicity input, to be precise in characteristic EQ model (line source), the problem is I can't see slip-rate value because it written NaN

 



from that I tried to count it manually, but I get stuck to define A in Equation (6)

 

can you give me some step or maybe the algorithm to find this value? so I can estimate the slip-rate to match it to data

need your help
thank you