IRIS Movie of the Day
At least once a week a movie of the Sun taken by NASA's Interface Region Imaging Spectrograph (IRIS) is posted by one of the scientists operating the instrument.
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20 Mar 2018
UV compact bursts
Credit: IRIS, LMSAL/NASA, IRIS, LMSAL/NASA, Arkadiusz Berlicki
On September 24, 2013 IRIS observed an AR 11850, where many compact bursts were visible. Very large and dense raster allows to analyze spectral profiles of MgII, SiIV and CII lines suggesting highly dynamical nature of these phenomena. These compact burst can be the manifestation of small scale magnetic reconnection in the photosphere or chromosphere and they offer a unique opportunity to study heating and reconnection processes in solar atmosphere.