The seismological base of Tehran University's Geophysics Institute registered the tremor in an area measuring 26.81 degrees in latitude and 56.03 degrees in longitude.
There are no immediate reports of any damage or casualty.
Earlier in the day, the island was rattled by a 4.3-magnitude earthquake, which caused no casualty or damage to property. It occurred at 04:04 local time (0034 GMT) on Thursday morning.
The first and killer earthquake struck Qeshm last Sunday with a magnitude of 5.9, killing 10 people, injuring scores of others, and flattening several villages.
Having an area of 1,500 square kilometers, Qeshm is the biggest island of the Persian Gulf.
The island is one of Iran's lucrative commercial and fishing ports. Hara Forest nestled in the island is a must-see spot.
The island has a population of more than 100,000.