The plane in the video is part of the tsunami test that was done here in Humboldt and Del Norte Counties today. Tones were sent to radio, and TV stations as well as 911 call back to those living in low lying areas.
We got 911 call back at the station here at the foot of Humboldt Hill as we are in the tsunami danger zone.
The plane sent from Southern Oregon flew the coast and broadcast an audio message of the test. This is to inform anyone along the beaches and low lying areas that may have missed the radio, TV and phone messages.