  The activity of the Quadrantids in January during several years (2008, 2010,
2011 and 2012) has been investigated in the framework of the SPanish Meteor
Network (SPMN). For this purpose, an array of high-sensitivity CCD video
devices and CCD all-sky cameras have been used to obtain multi-station
observations of these meteors. These allowed us to obtain precise radiant and
orbital information about this meteoroid stream. This paper presents a large
set of orbital data (namely, 85 orbits) of Quadrantid meteoroids. Most meteors
produced by these particles were recorded during the activity peak of this
shower. Besides, we discuss four Quadrantid emission spectra. The tensile
strength of Quadrantid meteoroids has been also obtained.
