EAS EAS Wireless Emergency Alerts (WEA) 1 — Questions and Answers
Question 1: What technology do Wireless Emergency Alerts (WEA) use to broadcast messages to mobile phones?
- SMS text messaging via carrier networks
- Cell Broadcast Technology (CBT) (Correct answer)
- Traditional AM radio simulcast
- Internet Protocol (IP) streaming
Correct answer: Cell Broadcast Technology (CBT)
WEA uses Cell Broadcast Technology, which pushes messages simultaneously to all compatible devices within a geographic area without requiring individual addressing.
Question 2: Which federal agencies share joint authority over the Wireless Emergency Alert (WEA) system?
- FEMA and the Department of Homeland Security
- FCC and the National Weather Service
- FCC and FEMA (Correct answer)
- FCC and the Department of Defense
Correct answer: FCC and FEMA
The FCC establishes technical standards and regulations for WEA, while FEMA coordinates alert policy and operates the IPAWS gateway that distributes alerts.
Question 3: What is the maximum character limit for a WEA message on 4G LTE and later networks under current FCC rules?
- 90 characters
- 160 characters
- 360 characters (Correct answer)
- 280 characters
Correct answer: 360 characters
Enhanced WEA rules increased the message character limit to 360 characters for 4G LTE and newer networks, up from the original 90-character limit.
Question 4: Which of the following lists all four official WEA alert categories?
- Presidential, Imminent Threat, AMBER, and Public Safety Message alerts (Correct answer)
- Presidential, Extreme Weather, AMBER, and National Security alerts
- Federal Emergency, State Emergency, AMBER, and Public Safety Message alerts
- Presidential, Imminent Threat, AMBER, and NOAA Weather alerts
Correct answer: Presidential, Imminent Threat, AMBER, and Public Safety Message alerts
WEA supports exactly four categories: Presidential Alerts, Imminent Threat Alerts (Extreme and Severe), AMBER Alerts, and Public Safety Message Alerts.
Question 5: What distinguishes a WEA message from a regular SMS text message on a compatible mobile device?
- WEA messages are delivered only to registered subscribers
- WEA messages produce a unique attention signal and distinct vibration pattern (Correct answer)
- WEA messages require Wi-Fi connectivity to be received
- WEA messages are encrypted with end-to-end encryption
Correct answer: WEA messages produce a unique attention signal and distinct vibration pattern
WEA messages produce a distinctive attention tone and a unique vibration cadence to ensure recipients notice and differentiate them from routine text messages.
Question 6: Which geographic targeting method does the WEA system use to deliver alerts to the correct recipients?
- ZIP code-based targeting via carrier databases
- County-level targeting only with no finer precision
- Cell broadcast targeting activating towers within or near the affected area (Correct answer)
- State-wide blanket broadcasts for all alerts
Correct answer: Cell broadcast targeting activating towers within or near the affected area
WEA uses cell broadcast technology to activate specific cell towers covering the targeted geographic area, delivering alerts to devices in that zone without using subscriber data.
Question 7: Regarding WEA opt-out policies, which alert type can users NOT opt out of receiving?
- AMBER Alerts
- Imminent Threat Alerts
- Presidential Alerts (Correct answer)
- Public Safety Message Alerts
Correct answer: Presidential Alerts
Presidential WEA Alerts are mandatory and cannot be disabled by users; AMBER Alerts, Imminent Threat Alerts, and Public Safety Messages may be opted out of in device settings.
EAS EAS Wireless Emergency Alerts (WEA) 1
What technology do Wireless Emergency Alerts (WEA) use to broadcast messages to mobile phones?