SUPERNATURAL EVENTS
Multiple acts, appearances, or events that are clearly beyond human ability, natural forces, or coincidence. These would be current events that were witnessed by a large number of objective, non-religious, people. The number of people would need to be large enough to minimize organized deception. Such events would violate natural law as we now know it, but some religious scriptures contain descriptions of events that violate natural law. People were healed, food created, dead revived.
Examples of supernatural events:
1. A detail presentation of physics that would complete our understanding of the Big Bang event.
2. Sudden interruption of a large natural disaster.
3. Interruption of a large human caused disaster.
4. Resurrection of a dead person. A person certified as dead for 3 days, monitored around the clock, then certified as live.
5. A medical miracle where a missing arm or leg was restored.
6. Demonstrating (initiating) a number of events that are beyond known natural forces.
7. On a daily basis, make his presence obvious to everyone on earth.
One or more of these would be evidence for a god.
An entity that can create a universe would be capable of acts that would remove all doubt of it's existence.