Delhi earthquake: Why did a 4.0-magnitude tremor feel so scary?

Residents of Delhi-NCR and northern India experienced strong tremors early Monday morning from a 4.0 magnitude earthquake. The epicentre was in Delhis Dhaula Kuan. No major damage or casualties were reported. The tremors felt more intense due to the shallow depth and proximity to densely populated areas. Authorities are monitoring aftershocks.