A powerful magnitude 7.4 earthquake struck western Colombia on Monday, killing dozens of people, damaging buildings across multiple cities, and shaking millions despite originating 68 miles beneath the Earth's surface. A powerful magnitude 7.4 earthquake struck western Colombia on Monday, killing at least 50 people, injuring hundreds more, and reducing buildings to rubble across parts of the country. Preliminary estimates from the U.S. Geological Survey (USGS) show that around 10.5 million people experienced Strong to Very Strong shaking, with the agency warning of a high probability of widespread damage and casualties. Rescue teams continue searching damaged buildings, while seismologists say the region should be prepared for additional aftershocks, some capable of producing strong shaking. The earthquake sequence is still unfoldingFor emergency managers, the main earthquake marks the beginning, not the end, of the crisis.