The NRC is also monitoring Unusual Events, the lowest emergency classification, declared at several other Eastern U.S. nuclear power plants.

FORBES: Quake-Rattled Nuke Plant Loses Power in Virginia

Twelve additional nuclear plants in Virginia, Maryland, Pennsylvania, New Jersey, North Carolina and Michigan declared "unusual events, " the lowest of four emergency situations.

WSJ: Virginia Nuclear Power Plant Loses Power After Quake

Mr. Page's expected absence from the two events seems "highly unusual, " said Rick Devine, head of Devine Capital Partners LLC, a high-tech search boutique in Redwood City, Calif.

WSJ: Google CEO Larry Page Assures Employees About Health, Says 'Nothing Seriously Wrong'

Hailed several years ago as a breakthrough immunotherapy for prostate cancer, its Provenge vaccine seemed likely to win FDA approval five years ago until an unusual turn of events prompted the agency to issue a delay.

FORBES: A Dendreon Post Mortem? Maybe Not Yet, But...

We're just learning the full story of how avid fan Shane Bennett got what may be the rarest version of Samsung's flagship phone through an unusual chain of events.

ENGADGET: Samsung sends Canadian a truly unique Galaxy S III, guarantees a loyal customer

The unusual exposure in beer country, along with tastings at rock concerts and BBQ events, and a new motto--"No wimpy wines!"

FORBES: Not-So-Fine Wine

After years of dominating the game's top-drawer events and rewriting the record books, Roger Federer and Rafael Nadal are starting down unusual paths that they hope will lead to more Grand Slam titles.

WSJ: Paths Differ but Goals Same for Nadal, Federer

With marked-up copies of Verizon's agreement, Cablevision attorneys pointed out areas they found weak: Verizon's schedule to build out service in the entire town, its obligation to restore damaged municipal property and clauses excusing Verizon from penalties in case of unusual events.

FORBES: Verizon's Big TV Bet Goes Small-Town