However, there were no reports of loss of lives or property.
A mild quake measuring 3.4 on the Richter scale, with its epicentre in Nandvi town, also shook Surat and Tapi districts of south Gujarat but no casualties were reported.
According to J L Gautam, Operations Head of National Centre for Seismology, "The earthquake measuring 6.8 on the Richter scale at a depth of 190 km hit Hindukush mountain region at 3:58 PM."
The Sunday afternoon tremors left people scampering out of their homes.
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Deputy Chief Minister Manish Sisodia, who was in Delhi Secretariat when the tremors were felt tweeted, "earthquake!!! It was really scary! I could see plants and furniture shaking at 6th floor office of Delhi secretariat. Wish all is well".
Delhi Metro services were briefly suspended following the temblor.
"Service were halted briefly after the quake but we resumed operations soon after," a Delhi Metro official said.
A mild earthquake hit Surat and Tapi districts of Gujarat around 3:04 pm, officials of the Institute of Seismological Research (ISR) said.
Surat District Collector Rajender Kumar said the low- intensity quake had its epicentre at Nandvi town near Surat.
"We have received reports of mild tremor with epicentre near Nandvi town. No reports of loss of life or property have been received," he said.
Tapi's Kakrapar town, which houses a nuclear power plant, also experienced the tremor, but there was no report of any damage to the facility.