The ~1.6611 Hz comb visible in H1 data for some the last few months seems to have disappeared on May 19. This is obviously good news. However, note that it has disappeared in the past only to reappear later, and we still don't know its cause. (See alog 68261) We now have two clearly observed change points (on March 18, and off May 19) and one approximate change point (between Feb 8 and Feb 17th).

May 18 spectrum (first attached image, 1.66 Hz comb in yellow triangles)

May 19 spectrum (second attached image)