  We propose quantum simulations of 1+1D radial sections of different black
hole spacetimes (Schwarzschild, Reissner-Nordstr\o{}m, Kerr and Kerr-Newman),
by means of a dc-SQUID array embedded on an open transmission line. This is
achieved by reproducing the effective speed of light in the 1+1D sections of
the spacetime with the propagation speed of the electromagnetic field in the
simulator, which can be modulated by an external magnetic flux. We show that
the generation of event horizons -- and therefore Hawking radiation -- in the
simulator could be achieved for non-rotating black holes, although we discuss
limitations related to fluctuations of the quantum phase. In the case of
rotating black holes, it seems that the simulation of ergospheres is beyond
reach.
