Core Viewpoint - Google has developed an innovative Android Earthquake Alerts (AEA) system that connects over 2 billion Android phones globally to create a vast earthquake monitoring network, successfully detecting earthquakes and sending early warnings to users in 98 countries [1][9][62]. Group 1: Technology and Functionality - The AEA system utilizes the accelerometers in Android smartphones to detect ground motion caused by seismic waves, sending data to Google's servers for analysis [12][13]. - From April 2021 to March 2024, the AEA system detected 11,231 suspected earthquake events, with 85% matching traditional earthquake catalogs [18]. - The system's initial magnitude estimation error has significantly improved, with the median absolute error decreasing from 0.50 to 0.25 [23]. Group 2: Alert Mechanism and User Experience - AEA sends alerts for earthquakes with an estimated magnitude of 4.5 or higher, targeting areas expected to experience significant shaking [26][27]. - Two types of alerts are issued: "TakeAction" for immediate action and "BeAware" for caution, with the former designed to capture user attention effectively [29][32]. - Since its launch in August 2020, AEA has reached 2.5 billion people, with a tenfold increase in the number of users receiving alerts compared to 2019 [34][37]. Group 3: Performance and Comparisons - AEA's alert accuracy is comparable to traditional systems like ShakeAlert and JMA, with AEA having the lowest error rates and issuing more alerts [35][37]. - The system has successfully detected significant earthquakes, such as the 7.8 magnitude earthquake in Turkey, providing timely alerts to millions of users [40][41]. Group 4: User Feedback and Trust - A survey indicated that 85% of users found the alerts "very helpful," with a majority expressing increased trust in the system [54][56]. - Only 0.1% of users opted out of receiving alerts, demonstrating high user acceptance and trust in the AEA system [57]. Group 5: Future Prospects - The AEA system represents a significant advancement in earthquake monitoring, leveraging consumer technology to provide timely alerts and improve public safety [58][63]. - Future developments may include enhanced data collection for better understanding of seismic hazards and improved emergency response capabilities [61][64].