Earth: Day Zero • Paper 234 of 512
Minimum Event Duration Requirements
Event duration determines the types of geological and geophysical signatures expected within the surviving record.
Observation
Short-duration, long-duration, and multiphase events leave different classes of signal across crustal, mantle, oceanic, and atmospheric systems.
Constraint Analysis
A viable Earth: Day Zero reconstruction must distinguish between rapid formation signatures, gradual modification, and later overprinting.
Open Questions
Which observed planetary structures are most consistent with rapid forcing, and which require long-duration modification?