  The magnetic order induced by the pressure was studied in single crystalline
FeSe by means of muon-spin rotation ($\mu$SR) technique. By following the
evolution of the oscillatory part of the $\mu$SR signal as a function of angle
between the initial muon-spin polarization and 101 axis of studied crystal it
was found that the pressure induced magnetic order in FeSe corresponds either
to the collinear (single-stripe) antiferromagnetic order as observed in parent
compounds of various FeAs-based superconductors or to the Bi-Collinear order as
obtained in FeTe system, but with the Fe spins turned by 45$^{\rm o}$. The
value of the magnetic moment per Fe atom was estimated to be $\simeq
0.13-0.14$~$\mu_{\rm B}$ at $p\simeq 1.9$~GPa.

Superconductivity;Strongly Correlated Electrons