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Damped Doppler shift oscillations have been observed in emission lines fromions formed at flare temperatures with the Solar Ultraviolet Measurements ofEmitted Radiation spectrometer on the Solar and Heliospheric Observatory andwith the Bragg Crystal Spectrometer on Yohkoh. This Letter reports thedetection of low-amplitude damped oscillations in coronal emission lines formedat much lower temperatures observed with the EUV Imaging Spectrometer on theHinode satellite. The oscillations have an amplitude of about 2 km/s, and aperiod of around 35 min. The decay times show some evidence for a temperaturedependence with the lowest temperature of formation emission line (Fe XII195.12 Angstroms) exhibiting a decay time of about 43 min, while the highesttemperature of formation emission line (Fe XV 284.16 Angstroms) shows noevidence for decay over more than two periods of the oscillation. The dataappear to be consistent with slow magnetoacoustic standing waves, but may beinconsistent with conductive damping.

Observations of Solar Doppler Shift Oscillations with the EUV Imaging Spectrometer on Hinode