California sits on an active plate boundary where the Pacific and North American plates grind past each other, producing frequent earthquakes.

Each year, approximately 20,000 earthquakes occur globally. Even though most of these earthquakes are weak or occur in unpopulated areas, their destructive potential is clear. While richer nations have been able to take measures to “earthquake-proof ...

From Taylor Swift concerts to roaring stadium crowds, synchronized cheering, dancing and screaming can shake the ground hard enough to register seismic activity. But can concerts actually cause real earthquakes?

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