Expert of the Week   for  15 - 28 May 2017

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Eliot Christian

Leader of the Filtered Alert Hub Project

National Oceanic and Atmospheric Administration (NOAA) Expertise:  International standards for open accessibility of data and information, especially metadata and networked information discovery; systems architecture at global scale; and, the intersection of policy with technology across governments and involving NGOs and commercial interests as well

Eliot Christian is a consultant to and retired from the World Meteorological Organization (WMO). Eliot is also retired from, but remains a volunteer to, the United States Geological Survey (USGS) where he worked in the Geographic Information Office and for many years helped lead national and global programs for geospatial and environmental data sharing. Since 2001, he has been active in developing and promoting the Common Alerting Protocol standard, especially internationally. Eliot is now leading the Filtered Alert Hub project within the NOAA Big Data Project, which includes a cloud-based prototype of the WMO Alert Hub.

The Common Alerting Protocol (CAP) and the Challenge of Public Warning

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QQuestion by Dr Richard Guillande

Hi Eliot, will you be at the Multi-hazard early warning conference in Cancun next monday and tuesday. Is there a chance to meet you for a discussion on how smarphone apps can integrate CAP ? you can join meon whatsapp +33682689192
Richard Guillande.

Dr Richard Guillande CEO | SIGNALERT sarl

APosted on 20 May 2017

Certainly, I am always glad to discuss how smartphone apps can leverage CAP-enabled alerting. This is pretty easy to do--just have the app subscribe to the official CAP alerts feed of interest at the Alert Hub of your choice (e.g.,

I will be at the Multi-hazard Early Warning conference in Cancun on Monday and Tuesday, and am staying all week at the Moon Palace Resort (Nizuc section).

During the poster session at 6pm on Monday, you can find me at poster number 3.73.

QQuestion by Mr Dave Paul Zervaas

Dear Eliot,
A very interesting initiative! Would you share an example of a message to be displayed on a smartphone and that in simple terms provides information to the general public who may need to be alerted while getting the information necessary to take action in their localities.

Mr Dave Paul Zervaas Programme Management Officer | UNISDR

APosted on 19 May 2017

Here is a CAP alert message for Hurricane Sandy in the U.S. as it appeared on smartphones (left - Android;right - iPhone). People who had only a plain cell phone received just an SMS text message, of course. If the smartphone is using a Google application or any of many different emergency alerting apps (e.g., the free Red Cross Hazards App), the alert is enriched with content such as the affected area map, and supplemented with relevant information such as where to find shelter or how to give First Aid.