Φ	magnetic flux
t	time
U coil	voltage on the pickup coil (inductive sensors)
M	magnetization
B surf	induction of the magnetic field
H ext	external magnetic field
H 1fj	the field of the first instability
d	thickness of the superconducting plate
W	width of the plate
T c	period of individual avalanche pulses in cascade
T av	the average period
F FFT	frequencies of the Fourier spectrum
F ma	frequency of the spectrum component with the maximum amplitude
F T	pulse repetition frequency
j c	critical current density
V ||	speed of propagation of the disturbance along the direction of the magnetic field
FFT	Fast Fourier transformation
ZFC	zero field cooling