For a 5.3 quake near the Channel Islands, beta-testers in Downtown LA had 10+ seconds notice
From Curbed:
Beta-testers of the app have been able to experience how well the technology works over the last few months. Today, when the app issued an alert about a 5.3 earthquake epicentered near the Channel Islands, people near Downtown LA had about more than 10 seconds notice before shaking started.
About EWL
Early Warning Labs (EWL) has partnered with the USGS to develop a powerful technology, that gives people time to take cover and creates automated responses for businesses, transportation & machinery to prevent massive damage.