On Wednesday, Nov. 9, at 2p.m. EST, WGBH will be participating in a test of the Emergency Alert System conducted by the Federal Emergency Management Agency, in coordination with the Federal Communications Commission and the National Oceanic and Atmospheric Administration).
The test will last for approximately 30 seconds and involve all TV and radio stations in the United States. Regular programming will resume upon its conclusion. Remember: it is only a test. Get more information about the EAS test here.