This is the spooky moment UFO-shaped cloud appeared on the summit of Mount Agung in Bali, Indonesia.

This rare weather phenomenon occurred for two days in a row last Friday and Saturday (May 22 and 23) in the Karangasem Regency.

Many residents believed that the shape of the clouds was similar to UFOs. Some say they resembled a hat or a plate.

The same shape of clouds appeared after the eruption of Mount Agung on January 23, 2019.

Iman Faturahman, head of the Data and Information Division from the Region III Meteorology Climatology and Geophysics Agency in Bali, said the phenomenon was Altocumulus Lenticularis, or lenticular clouds.

Clouds that normally appear near mountains are formed by humid air masses driven by the wind towards the top or top of the mountain. Air masses undergo a process of condensation to form clouds.

The clouds do not impact on the communities around the mountains but aircraft can experience turbulence if they pass through these clouds.

Lenticular clouds are also dangerous for mountain climbers as they limit visibility.

This is the spooky moment UFO clouds appeared on the summit of Mount Agung in Bali, Indonesia.

This rare weather phenomenon occurred for two days in a row last Friday and Saturday (May 22 and 23) in the Karangasem Regency.

Many residents believed that the shape of the clouds was similar to UFOs. Some say they resembled a hat or a plate.

The same shape of clouds appeared after the eruption of Mount Agung on January 23, 2019.

Iman Faturahman, head of the Data and Information Division from the Region III Meteorology Climatology and Geophysics Agency in Bali, said the phenomenon was Altocumulus Lenticularis, or lenticular clouds.

Clouds that normally appear near mountains are formed by humid air masses driven by the wind towards the top or top of the mountain. Air masses undergo a process of condensation to form clouds.

The clouds do not impact on the communities around the mountains but aircraft can experience turbulence if they pass through these clouds.

Lenticular clouds are also dangerous for mountain climbers as they limit visibility.