  Starquakes probably occur in rapidly spinning or ultra high field neutron
stars. In this article, we argue that highly compressed gas containing
electron-positron pairs could evaporate and erupt from inside the neutron star
when a crack forms and then heals during a starquake. Under the influence of
the existing oscillation modes of the star, the crack may have sufficiently
large size and long lifetime. An appropriate amount of gas can erupt into the
magnetosphere with relativistic and nearly uniform velocity, producing various
transient and bursting phenomena.
