  We report the discovery and characterization of high-speed (>100 km/s)
horizontal flows in solar active regions, making use of the Sun-as-a-star
spectroscopy in the range 5-105 nm provided by the EVE (Extreme Ultraviolet
Variability Experiment) spectrometers on the Solar Dynamics Observatory. These
apparent flows are persistent on time scales of days, and are well observed in
lines of Mg X, Si XII and Fe XVI for example. They are prograde, as evidenced
directly by blueshifts/redshifts peaking at the east/west limb passages of
isolated active regions. The high-speed flow behavior does not depend upon
active-region latitude or solar cycle, with similar behavior in Cycles 24 and
25.
