${\alpha }_t$	thermal expansion $\left({\mathrm{K}}^{-1}\right)$
$C_{\vartheta }$	specific heat $\left(\mathrm{J} {\mathrm{kg}}^{-1} {\mathrm{K}}^{-1}\right)$
${\delta }_{ij}$	Kronecker’s delta
$e_{\theta \theta },e_{\varphi \varphi }$	circumferential strains
$e_{rr}$	radial strain
$e$	volumetric strain (dilatation)
$e_{ij}$	strain tensor components
$\vartheta$	velocity of heat source $\left({\mathrm{m} \mathrm{s}}^{-1}\right)$
$\gamma \equiv \left(3\lambda +2\mu \right){\alpha }_t$	thermal modulus $\left({\mathrm{N} \mathrm{m}}^{-2}{ \mathrm{K}}^{-1}\right)$
$H\left(t\right)$	Heaviside’s unit step function
$H_0$	initial magnetic field
$k$	heat conductivity $\left({\mathrm{W} \mathrm{m}}^{-1}{ \mathrm{K}}^{-1}\right)$
$k^{*}$	rate of thermal conductivity $\left({\mathrm{W} \mathrm{m}}^{-1}{ \mathrm{K}}^{-1}\right)$
$\lambda ,\mu$	Lame’s constants $\left({\mathrm{N} \mathrm{m}}^{-2}\right)$
${\mu }_0$	electric permeability
$\rho$	density $\left({\mathrm{kg} \mathrm{m}}^{-3}\right)$
$R$	radius of the spherical hole $\left(\mathrm{m}\right)$
$\left(r,\theta ,\varphi \right)$	spherical coordinates system
${\sigma }_{ij}$	stress tensor components $\left({\mathrm{N} \mathrm{m}}^{-2}\right)$
${\sigma }_{\theta \varphi },{\sigma }_{r\theta },{\sigma }_{r\varphi }$	shear stresses $\left({\mathrm{N} \mathrm{m}}^{-2}\right)$
${\sigma }_{\theta \theta },{\sigma }_{\varphi \varphi }$	circumferential stresses $\left({\mathrm{N} \mathrm{m}}^{-2}\right)$
${\sigma }_{rr}$	radial stress $\left({\mathrm{N} \mathrm{m}}^{-2}\right)$
$s$	Laplace parameter
$\Theta =T-T_0$	temperature change $\left(\mathrm{K}\right)$
${\Theta }_0$	thermal constant $\left(\mathrm{K}\right)$
$T_0$	environment temperature $\left(\mathrm{K}\right)$
${\tau }_q$	phase-lag of heat flux $\left(\mathrm{s}\right)$
${\tau }_T$	phase-lag of temperature gradient $\left(\mathrm{s}\right)$
${\tau }_0$	first relaxation time $\left(\mathrm{s}\right)$
$\omega$	angular frequency of thermal vibration $\left({\mathrm{rad} \mathrm{s}}^{-1}\right)$
$Q_0$	strength of heat source $\left({\mathrm{W} \mathrm{m}}^{-3}\right)$
$\delta$	delta function
$\stackrel{\rightharpoonup }{q}$	heat flux vector $\left({\mathrm{W} \mathrm{m}}^{-2}\right)$
$u_r$	radial displacement $\left(\mathrm{m}\right)$
$u_{\theta },u_{\varphi }$	circumferential displacements $\left(\mathrm{m}\right)$