Sensors, data, warning - everywhere

Richard M Allen
University of California, Berkeley

Earthquake early warning is being implemented around the world.  The public safety value of warnings is driving investment in geophysical and alerting networks in earthquake prone regions.  Both traditional purpose-built networks, and citizen science or private sector networks are being used to detect earthquakes and deliver alerts.
Given this explosion of coverage, we must review how our warning systems are performing.  Public response to receiving alerts on smartphones is very positive.  But how accurate are the warnings?  How do we choose the right balance between the fastest alerts and the most accurate warning region?  In this talk we will review the status of warning around the globe, and look in detail at the performance of the detection and alerting mechanisms in the United States.  In addition to providing the data for alerts, the expanding network of sensors and data also provide new opportunities to evaluate our models of the earthquake process.