What if the ShakeAlert Earthquake Early Warning System Had Been Operating During the M6.9 1989 Loma Prieta Earthquake?

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How will ShakeAlert® likely perform now on a large earthquake impacting a major urban area? How much warning will you get? To answer this, let’s do a thought experiment...

Read the new Science for Everyone article at What if the ShakeAlert Earthquake Early Warning System Had Been Operating During the M6.9 1989 Loma Prieta Earthquake?

 

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Timeline for Simulated Earthquake Early Warning for M6.9 Loma Prieta showing the estimated arrival times for felt shaking at various locations (right side) and for various alerts (left side). (Public domain.)