Explosive events
Explosive events observed by SUMER on 28 March 1996 in the emission line of Si IV at 1393 A, formed in the transition region at about 100,000 K. The picture shows a time series of 60 Si IV spectra, each with an exposure time of 10 s, covering a time interval of 10 minutes altogether. The spectral window is 25 pixels, allowing observations of redshifts (to the left) and blueshifts (to the right) up to approx. 100 km/s. The north-south extension of the slit covers approx. 84.000 km on the Sun (120 arcsec).