Observable core response in neutron star spin glitches
  The superfluid core of a neutron star is usually assumed to corotate with the crust over timescales longer than minutes. I show that the interaction between the neutron superfluid and the type II superconductor of the outer core increases the coupling time to weeks or longer. I suggest that observed post-glitch response over timescales of weeks to years represents recovery of the outer core. Spin glitches could originate in either the inner crust or the outer core. 
Bennett Link
astro-ph.SR