TSG use the GEO_TECTONICS mailing list as it’s main source of information dissemination.
Administered by John Whalley it can be joined by sending a one line email message to:
jiscmail@jiscmail.ac.uk
The text of the message should be:
join geo-tectonics - your first name - your last name
The list, since it’s inception, has become much broader than TSG, but it is a great way of keeping up to date with research and issues in structure and tectonics.