Ok lets pick this apart shall we:
Doomsday seems to be your nemesis. Your beliefs need to be re-examined because they cause you so much anguish. Every
single statement I make says that humanity can survive with the right preparation. Your statements suggest otherwise. What are the possible doomsday scenarios that I believe can happen?
1. Solar flare shuts down the power grid. People have to survive without power for several weeks. This solar maximum is predicted to be a pretty mild one. Flares happen all the time, radiation from the sun is always hitting the Earth's magnetosphere, it's what causes the Northern Lights. Sometimes during high solar activity during the solar maximum, aircraft are stopped from flying over the polar reigons, as in rare occasions, radiation can stop their equipment from working. This year's solar max peak is not due until sometime in 2013, and again, is predicted to me as usual, or even a bit calmer. Our sun is not capable of producing a flare that would lead to a 'fireball' on Earth like in the movie knowing. Scientists have studied similar stars and have never observed this kind of behavour. Even the 'event' you describe is incredably rare, and probably if it does happen in the future, we would have improved power grids to be able to shut them down for a short period to protect them.
2. Major earthquakes happen. People have to survive without government assistance for several weeks. Major earthquakes happen all the time, every year, every day. Sadly people caught up in them often go he without or with very little government assistance at all due to economic or war realted issues. I do not think you understand the mechanics of an earthquake. Earthquakes are caused by the movement of the Earth's tectonic plates moving around. It is scientifically impossible for every plate on Earth to move at once, unless the crust was displaced by a massive force, like a huge planet passing by, the mythical Nibiru maybe? **It does not exist. There is no known physical or celestial thing on or around Earth that could cause a worldwide earthquake, it simply does not work like that. It is always wise to know what to do in the event of an earthquake if you live in earthquake prone parts of the world, however.**
3. Asteroid strike happens. People have to survive in a bunker as well as survive the impending nuclear winter.
There are no asteroids passing this year that pose ANY risk at all, or for many more years that pose a risk to the Earth. Meteorzap into the Earth's atmosphere every single day, some are as tiny as a grain of sand, some can be as big as a tennis ball. These form 'shooting stars', but they are not a star, they are a meteor zapping along in the atmosphere. Yes, they do occasionaly penetrate the atmosphere, but because Earth is a good 70% water, you usually never know about them. Try catching a meteor shower sometime, it is one of the mose beautiful sights you could ever see. Occasionaly you may hear a 'hissing and popping' sound, it is awesome.
4. World War 3. Same as #3. About the same risk now as there was in the 60s, probably more unlikely now because more and more countries are working together instead of against each other and more disputes are resolved peacefully. The main risk is from foreign and domestic terrorism, you should always be aware for any suspicious goings on like unattended bags in train stations etc. You could even argue WWIII has already started, with the US and UK vs Afghanistan and Iraq, and the Arab Spring revolution.
5. Methane fountains cause a firestorm. Anything in the open will be incinerated. Same as #3. Odds are increasing with the oil and methane leak. This has been going on for years and years, millions of years, and has had no ill effects on Earth otherwise human, animal and plant life wouldn't be thriving like it is now. I cannot find any science sites talking about this. There are proposals to extract and utilise methane to prevent greenhouse emmissions though, which has to be a good thing. The ONLY 'INFO' I FOUND CAME FROM THE HISTORY CHANNEL. This has NO basis in common scientific fact, just one quack 'scientist's claims. DISCOUNTED straight away.italic text
6. Tsunami off the Gulf Coast. Odds are increasing with the seafloor around the pipe leaking oil. What does happen whenthe oil empties and a big cavernous space no longer has any support? See Sumatra tsunami for historical example of the seafloor collapsing. Highly unlikely, very unlikely, even if it happened it would not be a globalised event. It would badly devistate the gulf area yes, but it would not be a global event. It may cause further oil issues in the area, but again, it is VERY VERY UNLIKELY to happen in mine or your lifetime.