In my LJ, the geological phenomenon I have posted about the most is SINKHOLES. I have come to believe that many or most non-human-caused sinkholes are due to two things: a rise of methane caverns and dissipations deep underground, and an expansion of our planet, both of which are related to planetary warming. Thus, sinkholes are not unrelated to the emergence of methane plumes from the warming ocean floors, or of methane PINGOs in the Siberian or North American permafrost tundra, caused by global wamring. Please note that methane, also humanly branded as "natural gas", is a toxic greenhouse gas with 40x more potency than CO2, meaning that a release of unburnt methane into the atmosphere shall cause an irrevocable spiral of global warming and climate catastrophe. We are already at that point, especially considering the high possibility that the inner planet is warming no-matter what. (Note: Burnt methane still releases CO2 but is less potent as a greenhouse gas, though is still a pollutant).
We hear more and more that the geomagnetic poles are a-thinkin' about switching around. Indeed, there is a growing instability and a weakening of the Earth's geomagnetic field, portending real problems down the road. This phenomenon cannot be separated from planetary warming. It is a fact that the planet goes through cycles of warming vs. cooling; of volcanic activity vs. relative dormancy; of meteor and comet impacts, and so on. These cycles are many and inter-relating. The reason for these cycles, and their complex interrelationships, are that our planet's orbit, tilt, etc., go through changes - as does solar activity - as does the interrelationship of bodies in the solar system - and as does the passage of our solar system in the galaxy. Our solar system is said to now be passing through a dusty, congested area in the galactic plain, and this may be why everything is heating up, including human industry. It may also bring us asteroids and other threats from beyond our solar system.
There have been countless reports and recordings of bizarre "Earth Change" phenomena occurring throughout the surface of the planet. Beyond sinkholes and pingos, there have been bright flashes, thunderous booms, "trumpets", metallic and train sounds in the atmosphere, roaming orbs of light, and so on. Everyone is confused as to the cause or nature of these things. I believe most or all of them are related to the thermodynamic, and consequently the geomagnetic, processes going on within the planet.
Noting that meteors produce sounds via geomagnetics which one can hear as they approach, even faster than the speed of sound, it is likely that geomagnetic stress within the planet shall also produce comparable noises on the surface. Noting that geological pressure underground is enough to produce piezoelectric dancing orbs of light above, then it is very possible that larger stresses even deeper underground shall produce roaming spheres of light, not unrelated to electricity. (Important note: my interpretation does not stop here, but bridges over to theories of the quantum and paranormal, e.g., "ghosts and extraterrestrials").
Finally, I believe that all of this is interrelated, on a scale generally beyond our current comprehension. For example: As the planet heats, and the geomagnetic activity changes, these strange booms and trumpets and flashes occur - but they are themselves additionally triggered by passing asteroids or comets, etc. This is because all bodies exert an electrical influence, for lack of a better phrase, according to the electric(al) universe theory. So, it is all interaction. We do not live in a bubble. Our own lives are part of greater and lesser processes.
There are fires going on below our feet, which I have most recently posted about in, "The Lost Souls of Centralia, Pennsylvania". There, I posted about a few natural or artificial fires burning directly underground, and space_66 also contributed the example of Burning Mountain. These sorts of things are more common than we might think, and I predict that there will be some big problems in the future caused by rising methane underground, as well. (Note that these events will in the future be tagged, "hell on earth", or, "geological - subsurface fires," etc.)
The following articles will let you know that the Earth is, overall, in general, even hotter beneath our feet than we had thought - whether this is a recent development or not. And, they will let you know that the Earth's core is far hotter than we ever thought. This means we are essentially floating on the skin of a veritable fireball. Our planet is powerfully dynamic. I also believe that it's interior is responsive to solar activity. For a long time, I have postulated that the true core of the Earth is a nuclear reactor - possibly even fusion. There are proved to be fission nuclear reactions, and radiation, going on beneath the surface, no argument. But I believe the idea that the true core may not even be solid. I am just mentioning this because I need to post more about it later, and may have posted a little on it in the past. It is possible that, true to the "perpetual creation" theory, our planet is a star just waiting to happen.
Hell On Earth: A Massive Crater In The Middle Of The Desert Has Been Burning For Decades
Scientists dug 12 km into our planet—what they found left me speechless
Is This The Gate To Hell? Researchers find Ancient ‘Portal To The Underworld’
Earth’s core is much hotter than previously thought – hotter than the surface of the Sun
Please see my TAGS page for your leisurely exploratory behaviour. - and see also brds_and_fishes!