The VERCE project has pioneered an
e-Infrastructure to support researchers using established
simulation codes on high-performance computers in
conjunction with multiple sources of observational data.
This is accessed and organised via the VERCE science
gateway that makes it convenient for seismologists to use
these resources from any location via the Internet. Their data
handling is made flexible and scalable by two Python libraries,
ObsPy and dispel4py and by data services delivered by
ORFEUS and EUDAT. Provenance driven tools enable rapid
exploration of results and of the relationships between data,
which accelerates understanding and method improvement.
These powerful facilities are integrated and draw on many
other e-Infrastructures. This paper presents the motivation for
building such systems, it reviews how solid-Earth scientists can
make significant research progress using them and explains
the architecture and mechanisms that make their construction
and operation achievable. We conclude with a summary of
the achievements to date and identify the crucial steps needed
to extend the capabilities for seismologists, for solid-Earth
scientists and for similar disciplines.