  We present our latest results on the solar-stellar connection by studying 18
solar analogs that we identified among the Kepler seismic sample (Salabert et
al., 2016a). We measured their magnetic activity properties using observations
collected by the Kepler satellite and the ground-based, high-resolution Hermes
spectrograph. The photospheric (Sph) and chromospheric (S) magnetic activity
proxies of these seismic solar analogs are compared in relation to solar
activity. We show that the activity of the Sun is actually comparable to the
activity of the seismic solar analogs. Furthermore, we report on the discovery
of temporal variability in the acoustic frequencies of the young (1 Gyr-old)
solar analog KIC10644253 with a modulation of about 1.5 years, which agrees
with the derived photospheric activity (Salabert et al., 2016b). It could
actually be the signature of the short-period modulation, or quasi-biennal
oscillation, of its magnetic activity as observed in the Sun and the 1-Gyr-old
solar analog HD30495. In addition, the lithium abundance and the chromospheric
activity estimated from Hermes confirms that KIC10644253 is a young and more
active star than the Sun.
