The graph is of the magnitude of the function with the real value between 0 and 2 and the imaginary between about 35 and 40.  I've misplaced the exact parameters I used.

"Riemann-Zeta", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License

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The graph is of the magnitude of the function with the real value between 0 and 2 and the imaginary between about 35 and 40. I've misplaced the exact parameters I used.