  In the expanding Earth framework it is possible to find additional phenomena
that could contribute in a proper way to the water balance and general tectonic
eustatism involved in the sea lever rising. Recent compilations seems to leave
unexplained up to 12 cm/century of sea rising, and possible solutions invoking
a polar ice shells melting near to the upper limit of the error bars reveal in
conflict with the consequent expected decreasing of the Earth angular velocity.
It is shown that taking into account possible effects of an expanding Earth,
the problem can be initiated towards an appropriate solution, at least as
regards the just orders of magnitude. Major effects on sea-level could come
from ongoing relaxation of curvature variations that are peculiar for an
expanding globe.
