Last year, Google rolled a new earthquake alert system for Android. At the time, it was California-only and based on the USGS's ShakeAlert, but the company also started work on another plan: Using the world's army of Android phones themselves to gather seismological data for earlier detection, notifications, and better accuracy. At the time, that crowdsourced data was limited to Google Search, but today Google is bringing it in the form of early earthquake detection notifications to phones, too — but only if you live in New Zealand or Greece.

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