AP says there was a 6.5 magnitude earthqauke in the Mariana Islands as seen here is inPacific Tsunami Warning Center - Bulletins. The Pacific Daily News (formerly the Guam Daily News?- I used to deliver it when I was a kid) reports that volcanic smog blown on to Guam from another island "vog" has been making some residents ill, but had no news on a quake when I looked earlier.
Update: Pacific Dialy News has the story.
Update: Seems like not too big a deal. Good.