Appears that Ingress.com is either having some storyline issues, or actual outages and agents may be having a hard time to sign up for some of the events. Here are the links we can find:
AUSTIN: http://events.ingress.com/xmanomalies/recursionprime/austin
BARCELONA: http://events.ingress.com/xmanomalies/recursionprime/barcelona
HONG KONG: http://events.ingress.com/xmanomalies/recursionprime/hongkong
YOGYAKARTA CITY: http://events.ingress.com/xmanomalies/recursionprime/yogyakarta
SALT LAKE CITY: http://events.ingress.com/xmanomalies/recursionprime/saltlakecity