Describe current technology (including alert and surveillance systems) available for buil collapse including the delivery channel (e.g. radio, television, sirens, social media) and availability of alert (e.g. everywhere, only large towns).
Describe current technology (including alert and surveillance systems) available for buil collapse including the delivery channel (e.g. radio, television, sirens, social media) and availability of alert (e.g. everywhere, only large towns).