How will allah descend to earth? When will allah come down to earth?
Following the descent to earth of the angels of the heavens, Allah glory be to Him, will also descend. All people and angels will then be aligned row upon row.
As is mentioned in verses of the Qur’an:
“What are they waiting for but Allah to come to them in the shadows of the clouds, together with the angels, in which case the matter will have been settled? All matters return to Allah. (Al-Baqara, 2:210)
“And the Earth will shine with the pure light of its Lord: the book will be put in place; the Prophet s and the witnesses will be brought; it will be decided between them with the truth; and they will not be wronged.” (Az-Zumar, 39:69)
A scene from that difficult and terrifying Day of Reckoning is presented to us in another Qur’anic verse as follows:
“No indeed! When the earth is crushed and ground to dust and your Lord arrives with the angels rank upon rank.” (Al-Fajr, 89:21-22)
One Prophetic narration reveals that when Allah Almighty makes Himself manifest on the Day of Rising, people will faint, unable to withstand His power and awesome majesty, and that the Messenger of Allah (may Allah bless him and grant him peace) will be the first to regain consciousness.
‘Abdullah ibn ‘Umar (may Allah be well pleased with him) reports:
“I saw The Messenger of Allah (may Allah bless him and grant him peace) on the mimbar and he was saying that Allah the exalted, will fold up the heavens and the earth on the Day of Judgement, take them in His hands and say:
‘I am Allah. I am the Lord. Where are the kings of the world? Where are the haughty? Where are the proud (today)?’
The Messenger of Allah (may Allah bless him and grant him peace) closed his fingers to form a fist, then opened them. I saw the mimbar shaking from underneath because of something trembling there. And I said to myself, ‘It will not fall with the Messenger of Allah standing on it.'” (See Muslim, Qiyama, 23-26)
That the people will be arrayed before their Lord on that Day is mentioned in the Qur’an in the following verse:
“They will be paraded before your Lord in ranks: ‘You have come to Us just as We created you at first. Yes indeed, even though you claimed that We would not fix a time with you!’” (Al-Kahf, 18:48)
In this verse, Allah also presents the great heedlessness that His slaves show in this world concerning their returning to and meeting with Him. But because everything in this world will have come to an end, regret and lamentation will be to no avail.
 The expression in the verse, “that Allah comes to them,” indicates that Allah Almighty will manifest Himself at the Place of Supreme Gathering in a manner that is to us unknown and that He will thus begin to call His slaves to account for whatever they have done in the world. Some Qur’anic exegetes have understood this statement to mean, “The coming of Allah’s command and severe punishment”.
 See Bukhari, Khusumat, 1.