Using the existing equipments(iphone or ipad) to easily build their own micro earthquake early warning system, the earthquake wave is about to arrive immediately issued a voice warning, the use of the system needs to have WI-FI and two sets of iPhone (or iPad). Requires IOS 8.0 or higher. Compatible with iPhone and ipad.In the absence of WI-FI, open a iPhone hotspot and bluetooth. Will another iPhone (iPad) access to.
whenever and wherever possible. The earthquake dog is a good choice of vibration warning for Business people and travellers.
This can also be applied in the aftershock warning.