• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
TechFederal Government

Here’s why the government just pinged your phone or TV with ‘THIS IS A TEST’

By
Rebecca Santana
Rebecca Santana
and
The Associated Press
The Associated Press
Down Arrow Button Icon
By
Rebecca Santana
Rebecca Santana
and
The Associated Press
The Associated Press
Down Arrow Button Icon
October 4, 2023, 2:23 PM ET
Emergency test system
An emergency alert is displayed on a cellphone.Susan Montoya Bryan—AP Images

“THIS IS A TEST”: If you have a cellphone or are watching television Wednesday, that message will flash across your screen as the federal government tests its emergency alert system used to tell people about emergencies.

Recommended Video

The Integrated Public Alert and Warning System sends out messages via the Emergency Alert System and Wireless Emergency Alerts.

The Emergency Alert System is a national public warning system that’s designed to allow the president to speak to the American people within 10 minutes during a national emergency via specific outlets such as radio and television. And Wireless Emergency Alerts are short messages — 360 characters or less — that go to mobile phones to alert their owner to important information.

While these types of alerts are frequently used in targeted areas to alert people in the area to thing like tornadoes, Wednesday’s test is being done across the country.

The test is slated to start at 2:20 p.m. Eastern time on Wednesday. Wireless phone customers in the United States whose phones are on will get a message saying: “THIS IS A TEST of the National Wireless Emergency Alert System. No action is needed.” The incoming message will also make a noise and the phone should vibrate.

Customers whose phones are set to the Spanish language will get the message in Spanish.

The test will be conducted over a 30-minute window started at 2:20 p.m., although mobile phone owners would only get the message once. If their phones are turned off at 2:20 p.m. and then turned on in the next 30 minutes, they’ll get the message when they turn their phones back on. If they turn their phones on after the 30 minutes have expired they will not get the message.

People watching broadcast or cable television or listening to the radio will hear and see a message lasting one minute that says: “This is a nationwide test of the Emergency Alert System, issued by the Federal Emergency Management Agency, covering the United States from 14:20 to 14:50 hours ET. This is only a test. No action is required by the public.”

Federal law requires the systems be tested at least once every three years. The last nationwide test was Aug. 11, 2021.

The test has spurred falsehoods on social media that it’s part of a plot to send a signal to cellphones nationwide to activate nanoparticles such as graphene oxide that have been introduced into people’s bodies. Experts and FEMA officials have dismissed those claims, but some social media users say they’ll shut off their cellphones Wednesday.

People also suggested turning off phones for other reasons, such as not disturbing students and teachers in classrooms or children during naptimes at day care. At the White House, messages taped to chairs in the press briefing room asked members of the media to turn off their cellphones.

The test has also sparked discussion about how it could affect people in abusive situations. Some people in abusive situations have secret cellphones — usually with notifications muted — hidden from their abuser that allow them to keep contact with the outside world. Organizations that work with survivors of abuse are recommending they turn off their phones entirely during the 30-minute-long test Wednesday so as to not have the blaring noise give away to their abuser the fact that they have a secret phone.

Join us at the Fortune Workplace Innovation Summit May 19–20, 2026, in Atlanta. The next era of workplace innovation is here—and the old playbook is being rewritten. At this exclusive, high-energy event, the world’s most innovative leaders will convene to explore how AI, humanity, and strategy converge to redefine, again, the future of work. Register now.
About the Authors
By Rebecca Santana
See full bioRight Arrow Button Icon
By The Associated Press
See full bioRight Arrow Button Icon

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Tech

AP
AIMedia
Associated Press starts offering buyouts to newspaper journalists amid wider AI transformation
By David Bauder and The Associated PressApril 6, 2026
8 hours ago
Sam Altman says AI superintelligence is so big that we need a ‘New Deal.’ Critics say OpenAI’s policy ideas are a cover for ‘regulatory nihilism’
AIOpenAI
Sam Altman says AI superintelligence is so big that we need a ‘New Deal.’ Critics say OpenAI’s policy ideas are a cover for ‘regulatory nihilism’
By Sharon GoldmanApril 6, 2026
8 hours ago
altman
AIdisruption
Sam Altman’s big pitch to fix the big AI mess sounds like Jamie Dimon’s: a 4-day workweek and a big new tax on rich people like him
By Jake AngeloApril 6, 2026
8 hours ago
robot with drill in arm
AIRobots
‘No one’s raising their hand’: Japan’s labor crisis is making the case for robots taking the jobs you don’t want
By Catherina GioinoApril 6, 2026
8 hours ago
H&R Block CEO shares the deeply human fear that separates middle managers from those destined for the C-suite
C-SuiteNext to Lead
H&R Block CEO shares the deeply human fear that separates middle managers from those destined for the C-suite
By Ruth UmohApril 6, 2026
10 hours ago
Young man working on a laptop drinks coffee in a restaurant
EconomyJobs
AI is cutting 16,000 U.S. jobs a month—and Gen Z is taking the brunt, Goldman Sachs says
By Nick LichtenbergApril 6, 2026
12 hours ago

Most Popular

The U.S. military set up an improvised airfield deep inside Iran to rescue the F-15 airman. Marines just practiced building one in the desert
Politics
The U.S. military set up an improvised airfield deep inside Iran to rescue the F-15 airman. Marines just practiced building one in the desert
By Fortune EditorsApril 5, 2026
1 day ago
During the rescue of the F-15 airman in Iran, the U.S. military blew up two of its own transport planes that had to be left behind
Politics
During the rescue of the F-15 airman in Iran, the U.S. military blew up two of its own transport planes that had to be left behind
By Fortune EditorsApril 5, 2026
2 days ago
A CIA deception campaign in Iran helped the spy agency uncover the location of the downed F-15 airman, who was hiding in a mountain crevice
Politics
A CIA deception campaign in Iran helped the spy agency uncover the location of the downed F-15 airman, who was hiding in a mountain crevice
By Fortune EditorsApril 5, 2026
1 day ago
Millions of Americans paid billions in tariffs later ruled illegal — and they won't see a dime back
Commentary
Millions of Americans paid billions in tariffs later ruled illegal — and they won't see a dime back
By Fortune EditorsApril 6, 2026
16 hours ago
Netflix cofounder says he stopped work at 5 p.m. every Tuesday for 30 years to stay 'sane,' no matter the crisis: 'Nothing got in the way of that'
Success
Netflix cofounder says he stopped work at 5 p.m. every Tuesday for 30 years to stay 'sane,' no matter the crisis: 'Nothing got in the way of that'
By Fortune EditorsApril 5, 2026
2 days ago
Sam Altman says AI superintelligence is so big that we need a ‘New Deal.’ Critics say OpenAI’s policy ideas are a cover for ‘regulatory nihilism’
AI
Sam Altman says AI superintelligence is so big that we need a ‘New Deal.’ Critics say OpenAI’s policy ideas are a cover for ‘regulatory nihilism’
By Fortune EditorsApril 6, 2026
8 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.