  Background: Unravelling the role played by nonvalence flavors in baryons is
crucial in deepening our comprehension of QCD. Strange quark, a component of
the higher Fock states in baryons, is an appropriate tool to investigate
nonperturbative mechanisms generated by the pure sea quark.
  Purpose: Study the magnitude and the sign of the strangeness magnetic moment
$\mu_s$ and the magnetic form factor ($G_M^s$) of the proton.
  Methods: Within an extended chiral constituent quark model, we investigate
contributions from all possible five-quark components to $\mu_s$ and $G_M^s
(Q^2)$ in the four-vector momentum range $Q^2 \leq 1$ (GeV/c)$^2$. Probability
of the strangeness component in the proton wave function is calculated
employing the $^3 P_0$ model.
  Results: Predictions are obtained without any adjustable parameters.
Observables $\mu_s$ and $G_M^s (Q^2)$ are found to be small and negative,
consistent with the lattice-QCD findings as well as with the latest data
released by the PVA4 and HAPPEX Collaborations.
  Conclusions: Due to sizeable cancelations among different configurations
contributing to the strangeness magnetic moment of the proton, it is
indispensable to (i) take into account all relevant five-quark components and
include both diagonal and non-diagonal terms, (ii) handle with care the
oscillator harmonic parameter $\omega_5$ and the ${s \bar s}$ component
probability.

High Energy Physics - Phenomenology;Nuclear Theory