Gravitational pull of the Son in a straight line, more or less.
It can be this is a factor.
Lot's people were terminated at early morning; so the angels who came to him: told him to go by night, so that the people of that city would not prevent him from leaving. And he was told that he should move behind his family members lest some of them might return, like his wife who returned to the city for something she had forgotten, and by morning she was in the city and involved by the earthquake to die under the wreck.
In the Torah of Ezra
the now available Torah), his wife turned back to become a heap of salt. while in fact, the forbidding was that she should not return to the city.
{
Quran 11: 81. [The angels] said: "Lot, we are the messengers of your Lord; they will never do you [any harm m];
so take your family n and set forth in a travel throughout the remaining part of the night o,
and let not anyone of you turn back [for his property or luggage p],
excepting your [betraying] wife q,
for it will befall her the [earthquake] which will befall them;
their [destruction] appointment surely is the morning, will not morning come soon?" r}
.......................................................
m And one of the angels took a handful of dust and smote the faces of the men with it, which fell in their eyes so they became blind, and returned to their families saying: “There are, in the house of Lot, some magicians who blinded our eyes.”
n It means: Go out from among them, you and your family.
o i.e. Go away from them as far as you can within some part of the night.
p i.e. let not anyone of you return for something he has forgotten or something he has left behind.
q Because she will turn back and return for something she has forgotten.
r Therefore Lot, his wife and his two daughters went out at the pre-dawn time.
This is according to His saying – be glorified – in the Quran 54: 34, which means:
(
Save Lot's family when We saved at the pre-dawn time.)
Then midway, his wife returned to bring some of stuffs she forgot in the city, so that it was morning when she was in the city, so the earthquake seized them and she was dead together with them.
Then a shower of stones was rained out of the sky on the rest of them.
And the earthquake, in that region of the earth, destroyed four cities which were:
Sodom where Lot dwelt,
Gomorrah,
Zeboyim and
Admah.