  According to the flow narrative commonly applied to high-energy nuclear
collisions a cylindrical-quadrupole component of 1D azimuth angular
correlations is conventionally denoted by quantity $v_2$ and interpreted to
represent elliptic flow. Jet angular correlations may also contribute to $v_2$
data as "nonflow" depending on the method used to calculate $v_2$, but 2D
graphical methods are available to insure accurate separation. The nonjet (NJ)
quadrupole has various properties inconsistent with a flow interpretation,
including the observation that NJ quadrupole centrality variation in A-A
collisions has no relation to strongly-varying jet modification ("jet
quenching") in those collisions commonly attributed to jet interaction with a
flowing dense medium. In this presentation I describe isolation of quadrupole
spectra from pt-differential $v_2(p_t)$ data from the RHIC and LHC. I
demonstrate that quadrupole spectra have characteristics very different from
the single-particle spectra for most hadrons, that quadrupole spectra indicate
a common boosted hadron source for a small minority of hadrons that "carry" the
NJ quadrupole structure, that the narrow source-boost distribution is
characteristic of an expanding thin cylindrical shell (strongly contradicting
hydro descriptions), and that in the boost frame a single universal quadrupole
spectrum (L\'evy distribution) on transverse mass $m_t$ accurately describes
data for several hadron species scaled according to their statistical-model
abundances. The quadrupole spectrum shape changes very little from RHIC to LHC
energies. Taken in combination those characteristics strongly suggest a unique
{\em nonflow} (and nonjet) QCD mechanism for the NJ quadrupole conventionally
represented by $v_2$.
