Why is my dog having seizures?

I know I've asked about this before, but its gotten worse and I don't know what to do. She had two within a twelve hour period, and then another one. She is a Bet Lab mix and is about ten years old. I know she is old but I was wondering if there was anything I could do to stop them. The middle one was the worst. In the other two, she was awake. The second one she was awake and it was horrible. Is there anything I can do to help Rosie?