Powerful 6.4 magnitude earthquake rattles Delhi, Gurgaon, Noida, and Nepal.

Tremors felt in Bihar and along the Indo-Nepal border.

Epicenter located in Nepal, near Ayodhya and Kathmandu.

Indian PM Modi expresses solidarity with Nepal, 128 lives lost.

Seismic event's grim toll: 140 injuries in Jajarkot and Rukum.

Delhi-NCR impacted, NCS reports depth of 10 km.

Third significant earthquake in Nepal within a month.