Situation: was the website gymbalance.ru
gymnastics school in St. Petersburg, with good positions in St. Petersburg requests. This website has a section of articles, separate pages for each branch in St. Petersburg and other informational pages. With the opening of branches in Moscow, there was a website on the subdomain msk.gymbalance.ru
very section articles, separate pages for each branch.
Now the question arose to rewrite the site and laying the correct logic. As a variant to make the Federal page gymbalance.ru and subdomains for each city the msk.gymbalance, spb.gymbalance.ru and others, under projects fest.gymbalance.ru, magazin.gymbalance.ru.
1. The correct idea? Is there a better way to tie all the projects under one name?
2. How to minimize the sagging of the search traffic in the first place to Peter, because gymbalance.ru is General information, and spb.gymbalance.ru new subdomain. That is for information pages and pages for each St. Petersburg branch, their domain will change it?
3. The block of articles grouped under the main domain, or should each subdomain to write your articles?