Answer :
The emergency notification feature enables smartphones to receive broadcasts from national emergency broadcast systems, such as the Emergency Alert System (EAS) in the United States.
Emergency Alert System (EAS):
The Emergency Warning System (EAS) is a national public warning system commonly used by state and local agencies to communicate critical emergency information, such as weather and AMBER warnings, to affected communities. EAS participants — radio and television stations, cable systems, satellite radio and television providers, and wireline video providers — will voluntarily issue local his alerts, but the president will address the public during a national emergency. must be given the opportunity to do so.
Most EAS alerts are issued by the National Weather Service in response to severe weather, but an increasing number of state, local, territory and tribal agencies are also broadcasting alerts. In addition, the NOAA Weather Radio All Hazards network is the only government-sponsored radio broadcast of warning information to the public and is part of EAS.
It is coordinated jointly by the Federal Emergency Management Agency (FEMA), the Federal Communications Commission (FCC), and the National Oceanic and Atmospheric Administration (NOAA). EAS regulations and standards are administered by the FCC's Public Safety and Homeland Security Bureau. All television, radio, satellite radio stations, and multichannel video program distributors (MVPDs) should participate in this system.
EAS is a front end to the Integrated Public Warning and Warning System (IPAWS) that coordinates the distribution of warning information across multiple channels, including EAS: Wireless Emergency Alerts (WEA) using Common Alerting Protocol (CAP).
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