The National Weather Service accidentally sent out a false-alarm tsunami warning to residents of the East Coast this morning.
Users of weather services received a message suggesting that there was a tsunami warning in place from 8.30 a.m. ET. But in fact there was no report of earthquake activity.
The NWS has confirmed in a tweet that the alert was supposed to be a test, but that the word "test" was missing from the message.
Meteorologist Hendricus Lulofs told the Herald Tribune that a glitch during a routine test meant "some people received what looked like an actual warning on their phones".
The false alarm follows alast month. The alert warned residents to seek shelter and read, "THIS IS NOT A DRILL".