Suffocating smoke south of Himalaya

Sentinel-3 OLCI FR acquired on 30 October 2018 from 05:05:35 to 05:11:35 UTC
...
Sentinel-3 OLCI FR acquired on 14 November 2018 at 03:38:48 UTC
Sentinel-3 OLCI FR acquired on 14 November 2018 from 05:16:47 to 05:19:47 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Atmosphere, pollution, air quality, smog, land, urban growth, public health, energy, transport, crop burning, India, Nepal, Bhutan, Pakistan, Bangladesh
Fig. 1 - 30.10.2018-02.11.2018 - With the crop burning season & need to heat homes, carbon-rich fumes filled Ganges plains.
Fig. 2 - 03-06.11.2018 - The air quality somewhat improved the next few days.
Fig. 3 - 07-10.11.2018 - Then the 5th came Diwali, the Hindu festival of light, notorious for its use of black powder fireworks.
Fig. 4 - 11-14.11.2018 - Diwali ended the 10th at night. Blocked by Himalaya, the dense fumes only left East India days later.