Origin and efficiency of the SIRs reported in the LANCE.

The Stream Interaction Regions (SIRs) are generated in the interplanetary medium when a fast solar wind stream overtakes a slower one. If these large-scale phenomena interact with the Earth's magnetosphere they can give rise to geomagnetic storms (GSs). In this study we analyze the efficiency generated by the SIRs-magnetosphere interaction of a set events that were reported in the LANCE (Laboratorio Nacional de Clima Espacial) from 2017, November until now. In order to perform this study, we use two global geomagnetic indices (Kp (estimated global index) and Dst (Disturbance storm time)) and two local geomagnetic indices (Kmex and Dst-mex). In addition, we analyzed the coronal holes where the fast solar wind was originated using synoptic maps.