Temporal Behavior of Explosive Events Seen in UV by SUMER

We study the source of (EE) at a the Si IV 139.37 nm emission line observed by SUMER onboard SoHO. The North-South (NS) profiles are studied at the different channels of the line with the aim to identify plasma displacement at the source of EE. Differences between the channels are observed in the extension and shape of the source. In some cases expansion and displacement of the source are observed. In this work such cases and others where there are clear differences between the behavior of the red and the blue channels of the emission line are shown. Data obtained in the raster regime were used in order to identify the position (at both NS and EW direction) and time of the maximum radiance of each EE.