Another phenomenon some people worry about is space weather and solar activity. The fear is that, in 2012, the sun will reach the peak of an 11-year cycle known as solar maximum. When it does reach this peak on or around Dec. 21, 2012, the sun will unleash giant solar flares toward the Earth, causing unparalleled havoc.
This scenario is very similar to the previous one involving geomagnetic reversal, in that both pole shifts and solar activity occur at fairly regular intervals. Solar flares will likely happen sometime between 2012 and 2014, but they've been happening for years and years, and the worst they can do is interrupt satellite communications.
- Chivers, Tom. "'Web-bot project' makes prophecy of 2012 apocalypse." The Telegraph. Sept. 24, 2009. (June 3, 2011) http://www.telegraph.co.uk/technology/news/6227357/Web-bot-project-makes-prophecy-of-2012-apocalypse.html
- Morrison, David. "Doomsday 2012, the Planet Nibiru, and Cosmophobia." Astronomical Society of the Pacific. Sept. 21, 2009. (June 3, 2011) http://www.astrosociety.org/2012/ab2009-32.pdf
- NASA.com. "2012: Beginning of the End or Why the World Won't End"? Nov. 6, 2009. (June 3, 2011) http://www.nasa.gov/topics/earth/features/2012.html
- Phillips, Tony. "Earth's Inconstant Magnetic Field." NASA.com. Dec. 29, 2003. (June 3, 2011) http://www.nasa.gov/vision/earth/lookingatearth/29dec_magneticfield.html
- The Telegraph. "'Mayan 2012 apocalypse theory' not true, Nasa says." (Nov. 10, 2009) http://www.telegraph.co.uk/science/space/6534662/Mayan-2012-apocalypse-theory-not-true-Nasa-says.html
The fire under the tiny town of Centralia, Pennsylvania, has been burning since at least 1962 and, to this day, nobody knows how to put it out.