'Very strong' shakes felt by 1.5 million people - USGC

The earthquake that led to widespread disruption and more than 100 deaths in Colombia caused 1.5 million people to experience "very strong" shakes severe enough to "damage to unreinforced masonry buildings", according to the US Geological Survey (USGC). It says the 7.4-magnitude earthquake originated at an "intermediate depth" of around 100km (62 miles) within the "slab of old seafloor sinking beneath the South American continent". These intermediate depth