A tsunami warning was mistakenly sent to TV and radio stations throughout Alaska. The National Weather Service now says there's no danger of a tsunami anywhere. The erroneous message went out directly from the weather service to Alaska broadcasters.

It contained the computer ''header'' that a tsunami warning would carry. But it didn't have any other information in it. And if it had been a real warning, there would have been some actual text that outlined which areas of the state were covered by the warning.

A National Weather Service spokesman says officials suspect the warning was transmitted when someone accidentally double-clicked the cancel button with their computer's mouse. After the cancel button is clicked once, the screen disappears. But once it goes away, the screen behind it has the transmit button in the same location as the cancel button. The service says rapidly clicking the mouse twice may have unintentionally sent the tsunami warning. There's also no confirmation screen when the transmit button is clicked; it just goes.

A TV station in Anchorage (K-T-U-U) says it received dozens of phone calls asking about the warning. The Weather Service later sent a correction.