Have you ever heard of the band The Story So Far?
They are a Cali band ,right? 
Yes, so you have heard of them.
Actually no. What kind of music do they perform? 
They are a rock band 
Ok. What style? Hard, alternative, etc.. .
Pretty sure it would be classified as alternative
I see they've  released a few albums. I like alt-rock, so I will check them out!