On December 26th 2014, the tenth anniversary of the Indian Ocean Tsunami, Sri Lankan Mobile Network Operator Dialog unveiled version 2 of is Disaster and Emergency Warning Network; DEWN v2. Developed in the aftermath of the 2004 disaster, DEWN v1 utilised the growing mobile penetration rates in the country and built a system to fully utilise the capability of mobile communication to form an early warning network. This report provides an overview of the DEWN system, from conception through to its on-going development.

GSMA, 2015

DEWN – Sri Lanka’s Early Warning System
http://www.gsma.com/mobilefordevelopment/wp-content/uploads/2015/02/GSMA_Dialog_DEWN_Disaster_Emergency_Warning_Network.pdf