It was previously believed that the long-term persistent increase in the spin-down rate of the Crab pulsar following a glitch is direct evidence of a starquake-induced glitch or at least related to a starquake. Using radio data covering 1710 days following the 2017 glitch. we obtain an extreme persistent increase of the spin-down rate. which allows us to test the two prevailing models... https://www.roneverhart.com/7668/