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'Watch U.S. earthquakes unfold, just seconds after they occur. QuakeTracker displays data from the United States Geological Survey on an interactive map, using pulsing yellow circles to indicate a quake's magnitude. Tilt the map using a two-finger swipe to see the quake's depth. Zoom in to see more detail.  QuakeTracker has two modes. The first is Latest U.S. Seismic Activity. The app downloads data from the previous seven days, then...

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• Education  / TeacherEd  / Teaching Methods  / Science

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