Sistema Distribuido de Detección de Sismos Usando una Red de Sensores Inalámbrica para Alerta Temprana.

Detecting disruptive events using COTS sensors like the ones embedded in smartphones is a difficult challenge but also an interesting opportunity. In this paper, we present a distributed, reliable, hierarchical and hard real-time system architecture of smartphones acting as opportunistic sensor nodes. Using a low energy-consumption application, we have used the smartphones inertial sensor as an accelerograph. The deployed smartphones and the application form a low-cost wireless sensor network, that detects, analyses and notifies a seismic-peak. The systems optimizes the distributed calculations in the smartphones; communication capabilities and integration in order to provide extra time for early warning in disaster scenarios (e.g. earthquakes), although the architecture may be extended to other disruptive and rare events. We propose an innovative real-time solution which considers time and spatial analyses, not present in another works, making it more precise and customizable, coupling it to the features of the geographical zone, network and resources, so as providing evidence of the feasibility of earthquake early warning using a distributed network of cell phones. The architecture has been validated by extensive evaluation and the most relevant result has been the improvement in notifications delivery about a seismic-peak 12 seconds earlier than previous works in the epicenter zone, and a reduction in the number of false positives. Additionally the proposed architecture includes a post-event management to help users and strengthen coordination between aid-agencies in order to optimize human resources and time to implement measures in order to eliminate negative effects on the population.