California Earthquake Early Warning Program

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Tab 28California Earthquake EarlyWarning ProgramRyan Arba, Branch ChiefAugust 14, 2019

What is Earthquake EarlyWarning Not earthquake prediction Sensors detect the fast moving P-waves of an earthquake. The sensor data is sent to an earthquake alert center whichuses an algorithm to predict magnitude and intensity. Alerts are then distributed to the public. This process takes seconds.

EEW in California Senate Bill 135 (2013): Directed Cal OES to develop a comprehensive statewideearthquake early warning system in California through apublic/private partnership. Senate Bill 438 (2016): Established the California Earthquake Early WarningProgram and the California Earthquake Early WarningAdvisory Board to support the development of thestatewide earthquake early warning system. Funding: FY 16-17: 10m FY 18-19: 15m FY 19-20: 16m Sensor Network: 1,115 sensors statewide when complete

Use Cases Workforce can move to safelocations; elevators can stopat the nearest floor; placesensitive equipment in safemode; secure chemicals andhazardous materials; haltproduction lines to reducedamage. Automatically slow or stoptrains; stop oncoming bridgetraffic; divert inbound aircraft. General Public can drop,cover, and hold on; safelystop vehicles.

Public Alert Pathways By November 2019: MyShake App Wireless Emergency Alerts(WEA): Greater Bay Area andSoCal.

Mobile Phone App Cal OES is working with UC Berkley to testa statewide EEW App called MyShake. Fund research to determine whether ornot cell phones can be crowdsourced tosupplement the traditional seismicnetwork to reduce latency. MyShake is currently in testing and shouldbe released to the public in Oct/Nov2019. Free to all users

Wireless Emergency Alerts Oakland Test: Approximately 40,000 personslive/work within the targetzone. San Diego Countywide Test: Approximately 3.4 millionpersons live/work within thecounty. Results: 1/3 received alert within 10seconds 2/3 received alert within 60seconds 1/3 did not receive alert

How You Can Help Join the test group for the MyShake app Amplify messaging for public roll out Explore automated actions similar to BART or other newuse casesContact info: ryan.arba@caloes.ca.gov

What is Earthquake Early Warning Not earthquake prediction Sensors detect the fast moving P-waves of an earthquake. The sensor data is sent to an earthquake alert center which uses an algorithm to predict magnitude and intensity. Alerts are then distributed to the public. This process takes seconds.

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This earthquake was as big as:This earthquake was as big as: 500 Hiroshima bombs Half the eruption of Mt. St. Helens 11 Cape Mendocino earthquakes 1992 CAPE MENDOCINO RUPTURE 2004 Indonesian earthquake 1906 earthquake 1906 earthquake 2004 Indonesia How big was the 1906 Earthquake?

Earthquake early warning systems do not predict earthquakes before they happen. Instead, they rely on seismic sensors to detect shaking and alert people. Since earthquake waves start at the source and spread out, you can place seismic sensors close to the earthquake source. They can beam their warning signal at the speed of light to surrounding .

How will the earthquake early warning system be managed? In September 2016, Governor Jerry Brown signed Senate Bill 438 (Hill) into law. This bill established the California Earthquake Early Warning (CEEWS) Program and a CEEWS Advisory Board within the California Governor’sOffice of EmergencyServices.

Key words: Earthquake early warning, smartphone seismic networks, earthquake detection, earthquake alerts. 1. Introduction Seismology is an observational science that has always been limited by our ability to deploy sensing networks to study earthquake processes and the structure of the Earth. Earthquakes continue to have a

icant step towards a realistic earthquake early warning capability. As we discuss in the next section, its perfor-mance can be further improved by the P-wave method. 3. P-Wave Method [10] Motivated by the recent success of earthquake early warning systems, we have also conducted an investigation, using the real-time strong-motion data from CWB .

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