No. Buried lines are protected from wind and snow damage, but the solar flare is placing a very strong magnetic field over the entire earth. The magnetic lines of flux induce electrical current. The current will be induced in all wiring that is not packaged inside a grounded Faraday cage. The longer the wire, the more power collected. There are very long runs between your home and the electrical generating facility.
Metal conduit IS a faraday cage...
You are forgetting that 3 feet of Earth/soil is enough to ground out such events. The above ground lines are would be the victims. So, buried lines would be protected.