This seminar is not currently active. If you would like to start organizing this, you should (1) talk to other grad students and make sure there is enough interest that you will have speakers every week and (2) talk to the Galois Group president to get funding for snacks for the seminar. (Note that the student run research seminar, or SRRS, is an active student run weekly seminar and most people wanting to present do so there as of the 23-24 school year.)
The student-run algebraic geometry seminar usually occurs on Wednesdays at 2 pm (not 2:10 pm) in 2112 MSB. The exact schedule can be found on the math department's seminar page.
In Fall 2017, the co-organizers are Oscar Kivinen (kivineo1@math.ucdavis.edu) and Priya Kshirsagar (pskshirsagar@math.ucdavis.edu).