At SkyWest, in the Jet, LAX and SFO are reserve bases only and flucuate in senority. Captains seem Sr. and Fo's go Jr. Sacramento, Palm Springs are the most senior bases in the system. Frenso can be Jr for Fo's but for captains you need to be in the top 1/3 of senority to get in.

As far as the EMB120- Fresno is the Jr base for all. MRY, SAN, San Luis Obispo are senior for both CA/FO