﴿ تَتْبَعُهَا ٱلرَّادِفَةُ ﴾

“to be followed by further [convulsions]!”

and is followed by the Aftershock the second blast; between the two blasts is a span of forty years the sentence tatba‘uhā’l-rādifatu is a circumstantial qualifier referring to al-rājifa ‘the Tremor’ in other words the ‘day’ can adverbially accommodate both blasts and other events and so for this reason it can also properly function as the adverbial qualifier for the Resurrection that will take place after the second blast;