Emergency Mobile Alert

Emergency Mobile Alerts (EMA) is an alerting network in New Zealand designed to disseminate emergency alerts to mobile devices. Emergency Mobile Alerts are messages about emergencies sent by New Zealand authorised emergency agencies to capable mobile phones. The alerts are sent to participating wireless providers who will distribute the alerts to their customers with compatible devices via Cell Broadcast, a technology best suitable for public warning as it simultaneously delivers messages to all phones using a Mobile Cell tower. Similar solutions are implemented in the United States (Wireless Emergency Alerts (WEA)), The Netherlands (NL-Alert), European Union (EU-Alert), Canada, Japan, Taiwan, Chile, Philippines. One2many B.V.[1] provides this modern Emergency Mobile Alert system including the Cell Broadcast systems and the CAP (Common Alerting Protocol) based centralised Public Warning management system.

An Emergency Mobile Alert sent on 25 March 2020 about the imminent national lockdown for the COVID-19 pandemic.

Adoption Rate

Emergency Mobile Alerts has been used in New Zealand since November 2017, and every year a test message is sent which is broadcast throughout New Zealand. Among New Zealanders who have access to a mobile phone, seventy-nine percent received the latest test alert on Sunday 24 November 2019. A further eight percent didn’t personally receive the alert but were near someone who did. The reach of the Control Cell Broadcast message has increased since the first test message resulting that on 24 November 2019 8 out of 10 mobile handsets (79%) received a test emergency alert message sent out by Civil Defence and a further eight (8%) percent didn’t personally receive the alert but were near someone who did reaching in the end 87% of the New Zealand population.

  • 26 November 2017 - 58% of NZ population with access to mobile phone either received the nationwide test alert or was near someone who did receive the Cell Broadcast message[2]
  • 25 November 2018 - 79% of NZ population with access to mobile phone either received the nationwide test alert or was near someone who did receive the Cell Broadcast message[3]
  • 24 November 2019 - 87% of NZ population with access to mobile phone either received the nationwide test alert or was near someone who did receive the Cell Broadcast message[4]

National Public Warning System implementations

Many countries have implemented location-based alert systems based on Cell Broadcast. The alert messages to the population, already broadcast by various media, are relayed over the mobile network using Cell Broadcast.

Notable uses
gollark: It's not amazing, you have four times the pixels.
gollark: It might have a very slight impact because headers and stuff take space.
gollark: Also, I found it actually doesn't work *perfectly*, the video feature is broken for some stupid reason.
gollark: I think that works too. Though at this point Edge is effectively just reskinned Chromium.
gollark: Apparently Microsoft Teams "requires" Chrome or the desktop app to do voice/video meetings, but it also worked perfectly fine when I just switched the user agent in Firefox.

References
  1. "New Zealand Selects one2many for National Emergency Mobile Alert System". www.businesswire.com. February 9, 2018.
  2. "Survey report" (PDF). www.civildefence.govt.nz. 2017. Retrieved 2020-05-11.
  3. "Second emergency alert test: Almost double NZers get message". RNZ. January 4, 2019.
  4. "Nationwide test survey" (PDF). getready.govt.nz. 2019. Retrieved 2020-05-11.
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