flights to Asia canceled

Air Canada has issued a travel advisory for flights through Vancouver departing to and coming from Asia over the next few days.The carrier says volcanic activity at Sarychev Peak in the North Pacific Ocean is causing some major issues with the weather in that region.Flights directly affected are heading to and from Tokyo, Seoul, Beijing, Shanghai and Hong Kong.Customers are asked to double-check their flight before traveling to the airport.Air Canada says flights can be rescheduled with no penalties.