
At 10:19 a.m., Metrolink trains operating on Metrolink-owned tracks were slowed by an automated process initiated by Metrolink’s early earthquake detection system, which was adopted systemwide in March.
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The new technology automatically applies the brakes for safe and rapid slowing or stopping of trains in the event of an earthquake.
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The Earthquake Early Warning System uses data from the USGS-operated ShakeAlert® to notify Metrolink’s PTC system that an earthquake has occurred.
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