Since the Solar Analogs I workshop, we have completed a survey of chromospheric activity in the solar-age and solar-metallicity open cluster M67. We found that the distribution of the Ca II core strengths in the solar-type members of this cluster substantially overlapped the range of Ca II variation seen in the contemporary Sun since the mid-1970s. However, about 17% of the M67 solar-type stars are characterized by HK index values less than that seen at solar minimum while ~ 10% exhibit mean levels of chromospheric activity in excess of that observed at solar maximum. We recently carried out a program utilizing the ESO Very Large Telescope (VLT) and the UVES instrument to investigate the possible origins of the high levels of activity seen in some solar-type stars in M67. We will give a recapitulation of the conclusions from the earlier survey and present the new results from our VLT program along with their implications.
