Explain the phenomenon of dark black in the daytime in Ha Long

At about 9:00 am to 9:00 pm on April 3, the area of ​​Hon Gai (Ha Long, Quang Ninh) suddenly occurred strange phenomenon: the sky suddenly darkened, causing people to turn on the lights on the streets. convenient when participating in traffic, living lights.

>>>Strange phenomenon, night "suddenly" night in Ha Long city

This phenomenon immediately attracted much attention of public opinion. Many people believe that this is an amazing astronomical phenomenon, but there are extreme opinions that this is a bad omen.

Dark black phenomenon in the daytime in Ha Long.(Photo: baoquangninh.com.vn)

However, talking to reporters early in the afternoon, Mr. Nguyen Duc Phuong (Hanoi National University) affirmed that the phenomenon of 'night appear in the middle of the day' is normal, not a problem. Astronomy and spirituality.

Explaining that Mr. Phuong said that the dark sky is considered an astronomical phenomenon when the dark area is in the total eclipse. However, in 2014, the territory of Vietnam was not in the eclipse observation area.

The expert who participated in the Vietnam Astronomical Society also said that the incident at Ha Long morning 3/4 was meteorological phenomenon . The main reason is that the sky appears relatively dark clouds, covering large areas . In addition, the steam particles in the cloud are relatively large, absorbing sunlight that prevents light from penetrating. This is also called local dark phenomenon . This phenomenon has also been encountered in Vietnam and some parts of the world.

Like Mr. Phuong, expert Dang Vu Tuan Son (Chairman of Vietnam Young Astronomical Association) conjectures that this is a phenomenon of dense dark clouds .

Mr. Son also provided more information, in the morning of April 3, his relatives in Nam Dinh City also witnessed this phenomenon and had to turn on the lights to join the traffic.