The theory I currently believe in, is mostly the one suggested by Teddy in their book. Completed partly by details, discussed in the forum.
The timeline according to what I believe would be the following:
The tent is located in the forest at the foot of the slope. In the night, a tree falls on the tent, while the hikers sleep. Dubinina, Zolotaryev, Tibo and Kolevatov are badly injured. Dibinina and Zolotaryev die shortly after. Tibo and Kolevatov might be alive for a while longer.
Slobodin is injured in the head, but the adrenaline and the will to get out and help numbs the pain and nobody realizes that he's injured worse, than visible at first glance.
The others are hurt more or less badly, scratches and bruises. Maybe they need to cut the tent to get out. Maybe they cut it later in order to help those, still inside.
The night is long and cold. The Yuris die. One by freezing, one maybe because of his injuries.
Those left know, they need help, so they turn to the slope and climb it, in order to signal to the pilots, whose planes fly in the area of the slope. They are with the geological expedition. But they are cold, injured, tired, the adrenaline rush is over. Slobodin finally loses conscience and dies, because of his head injury. Dyatlov and Zina try to go on but finally fail.
The tent and the bodies are found. Not all though. In an attempt to cover up the accident because they are afraid of being made responsible for neglect of security, those found are brought to the morgue, washed and they are almost starting autopsies, when the search starts. Not all bodies are found as of yet, so it's decided to bring back the others and stage a scene, trying to make everyone believe, the hikers froze to death.
In order to cover up the bad injuries, some are thrown into the ravine, topped with KOH (in the hope to hasten the decay of the bodies) and much snow. Things don't go as expected and in the end the amount of KOH leaves radioactive traces on the ravine 4.
Please be gently, the question was for a timeline. I know there are flaws in the theory as depicted above. It's because I'm tired and don't want to look up all the details just now... In short you could say, I follow Teddy's theory with the add-on of the KOH, which I picked up in a thread in the forum-part concerning radioactivity.
All in all they died within a period of about 6-9 hours.