India, Feb. 17 -- A 4.0 magnitude earthquake struck Delhi early this morning, causing panic among residents. Those living in high-rise buildings, particularly in Noida and Ghaziabad, were alarmed, with many fearing for their safety amid growing concerns of potential aftershocks and further seismic activity.

With Delhi-NCR becoming a hub of high-rise buildings, some as tall as 29 floors if not more, here's what residents should know about high-rise safety.

While most high-rise buildings have incorporated advanced technologies, structural design experts say that buyers planning to buy into a high-rise or those already residing in one should not get confused with statements like "the building has been designed to Zone 5 or Zone 4 standards...