  This paper studies the behaviour of quadratic variations of a stochastic wave
equation driven by a noise that is white in space and fractional in time.
Complementing the analysis of quadratic variations in the space component
carried out by M. Khalil and C. A. Tudor (2018) and by R. Shevchenko, M. Slaoui
and C. A. Tudor (2020), it focuses on the time component of the solution
process. For different values of the Hurst parameter a central and a noncentral
limit theorems are proved, allowing to construct consistent parameter
estimators and compare them to the finding in the space-dependent case.
Finally, rectangular quadratic variations in the white noise case are studied
and a central limit theorem is demonstrated.
