Project titleoperation maintenance support and improvement of the shakealert earthquake early warning system for the west coast 20242027COLLABORATIVE research with univ

Of california berkeley california institute of technology univ. Of washington and univ. Of oregonproject PERIOD8 15 2024 through 8 14 2027AWARD purposeoperation maintenance support and improvement of the shakealert earthquake early warning system for the west coast. The regional geophysical networks on the U.S. West coast in california CA oregon or and washington WA will continue to collaborate with each other and the U.S. Geological survey USGS and provide data expertise and infrastructure for the USGS shakealert earthquake early warning system.activities to be performedcomplete the network of sensor stations remediate underperforming stations and operate and maintainstations. Ensure continuous and secure data flow to the regional central processing centers by maintaining andconfiguring various kinds of telemetry devices optimizing data routes and designing and implementingredundant data paths. Continuous monitoring of station health data quality and data flow. Maintenance of the software and IT infrastructure at each of the regional processing centers whereshakealert alert products are generated. Incrementally replace the internal message brokers and make other system changes intended to increaserobustness and flexibility. Continuous evaluation and improvement of the core algorithms with a special focus on very largeearthquakes earthquake sequences and offshore earthquakes. Evaluate whether additional measurements such as backazimuth and polarization estimates and sphasearrival times may further improve the system s reliability and accuracy. Investigate whether the systems reliability and accuracy might be improved by combining the results fromthe three core algorithms in different ways. For example investigate whether gfast PGD which isimportant for very large earthquakes and which is based on peak ground displacements should estimate itsdistance to the finite source estimate rather than the point source estimate. Take initial steps toward incorporating new types of data such as data from small aperture arrays and dataacquired using distributed acoustic sensing.deliverables and expected outcomestimely and accurate earthquake early warnings for a large proportion of the population or infrastructureexperiencing strong shaking due to an earthquake in or near CA or or WA. Improved understanding and tuning of the system with each significant earthquake and proactive testingusing scenarios and previously recorded data. Wellarticulated explanations of the system s strengths and limitations that allow users including thirdpartyalert distributors to make informed decisions. Increased awareness and use of the shakealert earthquake early warning system.intended beneficiaryiesthe U.S. Geological survey inhabitants of CA or and WA emergency management state agencies private and public entities wishing to take protective measures upon notification of imminent groundshaking due to an earthquake.subrecipient activitiesnot applicable