There were earthquakes along the mountains on the earth, and it appeared that there was fire everywhere. Many inauspicious planets like Saturn appeared, along with comets, meteors and thunderbolts.
When natural disturbances occur on a planet, one should understand that a demon must have taken birth there. In the present age the number of demoniac people is increasing; therefore natural disturbances are also increasing. There is no doubt about this, as we can understand from the statements of the Bhāgavatam.
(Srimad Bhagavatam------3:17:4------translation and purport).

On the upper chin of the śiśumāra is Agasti; on its lower chin, Yamarāja; on its mouth, Mars; on its genitals, Saturn; on the back of its neck, Jupiter; on its chest, the sun; and within the core of its heart, Nārāyaṇa. Within its mind is the moon; on its navel, Venus; and on its breasts, the Aśvinī-kumāras. Within its life air, which is known as prāṇāpāna, is Mercury, on its neck is Rāhu, all over its body are comets, and in its pores are the numerous stars.
(Srimad Bhagavatam------5:23:7------translation).

O Sudarśana, you have a very auspicious hub, and therefore you are the upholder of all religion. You are just like an inauspicious comet for the irreligious demons. Indeed, you are the maintainer of the three worlds, you are full of transcendental effulgence, you are as quick as the mind, and you are able to work wonders. I can simply utter the word namaḥ, offering all obeisances unto you.
(Srimad Bhagavatam------9:5:6------translation).

There are demons even in the form of brāhmaṇas. Therefore the Sudarśana cakra does not discriminate between brāhmaṇa demons and śūdra demons. Anyone against the Supreme Personality of Godhead and His devotees is called a demon. In the śāstras we find many brāhmaṇas and kṣatriyas who acted as demons and have been described as demons. According to the verdict of the śāstras, one has to be understood according to his symptoms. If one is born of a brāhmaṇa father but his symptoms are demoniac, he is regarded as a demon. The Sudarśana cakra is always concerned with annihilating the demons. Therefore he is described as adharma-śīlāsura-dhūma-ketave. Those who are not devotees are called adharma-śīla. The Sudarśana cakra is just like an inauspicious comet for all such demons.
(Srimad Bhagavatam------9:5:6------purport).

From the Transcendence, which is called Kṛṣṇaloka, there emanates a glowing effulgence that resembles the tail of a comet. This glowing effulgence is unlimited, immeasurable, and unfathomable. Within this effulgence there are innumerable glowing planets, each of them self-luminous. Somewhere, a limited part of that glowing effulgence is covered by material energy, just as a part of the sky is covered by a cloud. Within this material energy there are innumerable universes, in every universe there are innumerable material planets, and the earth is one of these planets. Thus we can understand what an insignificant part of the entire cosmos is this globe on which we live.
(Light of the Bhagavata).