The number of second quarter foreclosure filings in Riverside County nearly tripled compared to the same period in 2007. A total 24,362 mortgage default notices, auction sale notices and bank repossessions were recorded in Riverside County between April and June, roughly 18% more than the first quarter of 2008 -- and 189% more than the second quarter of 2007, according to Irvine-based RealtyTrac. The county remained number four in the state in the overall volume of foreclosure activity, and figures showed that California remained second in the nation in the number of reported foreclosure actions, just behind Nevada and just ahead of Arizona .