Lorraine Hwang from UC Davis has initiated the creation of a website that will provide an inventory of available legacy data that can be used as a resource for researchers. This is an evolving platform that is currently focused on collections that have resources available digitally.
The website provides useful information for researchers with interactive visualizations of stations and events. This is an ideal starting point for anyone planning to dig deeper into the issue.
Visit the website here: https://legacy-seismic-data.github.io/