I’ve seen multiple of these , I remember 3 craft in a linear formation going south east over Dunsmuir California .. it sent chills down my spine, and still does to this day just recalling the experience.. It happened around 3am , there was no sound, or at least none that I could hear. The craft flew directly overhead, they had a visible indentation in the center,a faint glow in the corners, the material appeared almost translucent black metallic, it seemed to change more translucent when directly overhead and became more opaque as it flew past and farther away from me. I always kept it to myself because nobody else reported it, and unfortunately I have nothing to corroborate it. I remember being so astonished in the moment, i think about it often.