  We report the first observations of simultaneous large-amplitude longitudinal
and transverse oscillations of a quiescent filament trigged by a two-sided-loop
jet formed by the magnetic reconnection between the filament and an emerging
loop in the filament channel, recorded by the Solar Dynamics Observatory and
the Solar TErrestrial RElations Observatory. The north arm of the jet firstly
pushed the filament mass moving northwardly along the magnetic field lines
consisting of the coronal cavity, then some elevated filament mass fell back
and started to oscillate longitudinally at the bottom of the cavity (i.e., the
magnetic dip). The northernmost part of the filament also showed transverse
oscillation simultaneously. The amplitude and period of the longitudinal
(transverse) oscillation are 12.96 (2.99) Mm and 1.18 (0.33) hours,
respectively. By using the method of filament seismology, the radius of
curvature of the magnetic dip is about 151 Mm, consistent with that obtained by
the 3D reconstruction (166 Mm). Using different physical parameters of the
observed longitudinal and transverse oscillations, the magnetic field strength
of the filament is estimated to be about 23 and 21 Gauss, respectively. By
calculating the energy of the moving filament mass, the minimum energy of the
jet is estimated to be about 1.96 x 10^28 erg. We conclude that the newly
formed jet can not only trigger simultaneous longitudinal and transverse
oscillations in a single filament, but also can be used as a seismology tool
for diagnosing filament information, such as the magnetic structure, magnetic
field strength, and magnetic twists.
