Magnetohydrodynamic (MHD) waves and oscillations, observed in astrophysical, laboratory and space plasmas provide us with an excellent tool for the remote diagnostics of the plasmas, which are, in particular, implemented in the techniques of solar coronal seismology, Earth’s magnetospheric magnetoseismology, and MHD spectroscopy of tokamaks. The identification of MHD modes in quasi-periodic pulsa ...