Trumpets of the apocalypse recorded at Riverview Park in Nebraska City on February 21, 2016.
No video but an audio recording of the sound made at approximately 11:34 p.m.
There is a train whistle at 45 seconds, otherwise it is just the trumpet blast:
NEBRASKA CITY, February 21, 2016 – Nebraska City residents in the Greggsport Addition are used to hearing trains whistle through the night, but sounds recorded at 11:34 p.m. on Feb. 21 were more akin to the mysterious Sounds of the Apocalypse circulating on the Internet and social media sites.
YouTube posts since 2011 have captured mysterious noises, some seeming to come from the sky. Reports of eerie trumpet sounds have been posted from around the world, including the Phillipines, Austrailia, Germany, Russia and the United States.
Snopes.com reports that the US Geological Survey experts note that unusual sounds can be attributed to deep earthquakes and waves crashing into distant cliffs. While the sounds are expected to have an earthly origin, some scientist say atmospheric noise can also be caused by meteor flashes and acoustic gravity waves.