Craig will concentrate on two of these. Most BGP information is redundant. Some may be due to now changed software. Probably not significant impact. Craig notes that most routing instability at 10am EST everyday, some amount during US business hours.
Instability appears to relate to network usage and congestion.
Craig suggest that this indicates a widespread failure of large parts of the Internet each day. There is a possibility that there is a strong 30 second periodicity which might be due to an interval timer one some routers. There are a few low frequencies. It also appears to not be vendor specific. There is also the possibility that it is due to CSU Oscillation.