GPS and plate tectonics?
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A GPS unit can track ground swelling (especially around active volcanoes).  It relays information about the position of the ground as it changes.\n\nA reading that changes is a definite indicator of change in the ground and could indicate earthquakes or erupions.\n\nAs for plate tectonics, it relays general continental motion (albeit in inches/year)
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volcanos\ntectonic plates movements
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Like pauliegone said, the lithosphere does in a way seperate the crust from the mantle.  The tectonis plates (crust) are supported by this semisolid layer.  However, the lithosphere is considered, by some scientists, part of the mantle.  So, it depends on which scientists you believe, although I believe that pauliegone is correct.
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Plate tectonics is the answer to your questions about weathering and erosion, as well as thickness of the continental crust. Plate tectonics moves and lifts continental plates continuously, and faster than erosion can carry the sediments away. Mt. Everest is a good example of this, as pressure from the adjoining crustal plates is lifting the mountain at a rate of a few centimeters a year. \n\nAs this pressure against the continental plates builds they often fold and break, and this causes parts of the contintal plates to slide up over other parts of the plate, making them thicker that the oceanic plates. \n\nAt present the only way to find the top of the mantle is using seismology. Siesmologists measure the way that shock waves (sound waves) move through the earth when earthquakes happen. By studying the way these sound waves are deflected from different rocks they can tell about how deep the boundary is between the crust and the mantle. \n\nHere is one of the best websites that explains plate tectonics. It has animated illustrations that show moving plates and how they have changed over time:\nhttp://www.ucmp.berkeley.edu/geology/tectonics.html
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I'm assuming you're asking about tectonic plate movement and not heavier stuff like the earth tilting on its axis. The first link shows a map of the earth currently and how it's moving so you can figure it out on your own.  The second link gives your the answer to your question.  It shows the Pacific Ocean getting much narrower.
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Time zones??? 24 of them, centred about GMT (Greenwich, UK)\n\nOr there are major tectonic plates - too many to name though.
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There is no right answer for this question. Just because the plates are moving and right now most of the land mass is in the northern hemisphere. That is just where the bulk of it is right now, and someday it will change.
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The tectonic plates are "floating" on a liqid mantle that has convection currents.  These convection move the plates around the globe.  This is the science behing plate tectonics
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try this:\nhttp://www.seismo.unr.edu/ftp/pub/louie/class/100/plate-tectonics.html
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tectonic plates or continental drift
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The beginnings of the theory of plate tectonics date to around 1920, when Alfred Wegener, the German meteorologist and geophysicist, presented the first detailed accounts of how today's continents were once a large supercontinent that slowly drifted to their present positions. Others brought forth evidence, but plate tectonics processes and continental drift did not attract wide interest until the late 1950s, when scientists found the alignment of magnetic particles in rock responded to the earth's magnetic field of that time. Plotting paleomagnetic polar changes (see paleomagnetism) showed that all continents had moved across the earth over time.\n\nSynthesized from these findings and others in geology, oceanography, and geophysics, plate tectonics theory holds that the lithosphere, the hard outer layer of the earth, is divided into about 7 major plates and perhaps as many as 12 smaller plates, c.60 mi (100 km) thick, resting upon a lower soft layer called the asthenosphere. Because the sides of a plate are either being created or destroyed, its size and shape are continually changing. Such active plate tectonics make studying global tectonic history, especially for the ocean plates, difficult for times greater than 200 million years ago. The continents, which are c.25 mi (40 km) thick, are embedded in some of the plates, and hence move as the plates move about on the earth's surface.\n\nThe mechanism moving the plates is at present unknown, but is probably related to the transfer of heat energy or convection within the earth's mantle. If true, and the convection continues, the earth will continue to cool. This will eventually halt the mantle's motion allowing the crust to stabilize, much like what has happened on other planets and satellites in the solar system, such as Mars and the moon.
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Plate tectonics (from the Greek word for "one who constructs and destroys", τεκτων, tektōn) is a theory of geology developed to explain the phenomenon of continental drift and is currently the theory accepted by the vast majority of scientists working in this area. In the theory of plate tectonics the outermost part of the Earth's interior is made up of two layers: the lithosphere comprising the crust and the solidified uppermost part of the mantle. Below the lithosphere lies the asthenosphere which comprises the inner viscous part of the mantle. The mantle behaves like a superheated and extremely viscous liquid.
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The USGS has diagrams of earthquake faults and what they look like during a quake.\n\nThe National Park Service has a good map of the various plates that make up the Earth's crust.
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(m)\n\nAustralian and American researchers investigating forces exerted on the Indo-Australian tectonic plate have discovered that the considerable stresses being exerted on the plate could be leading to its breaking up.\n\nARC Professorial Fellow, Mike Sandiford, from the University of Melbourne’s School of Earth Sciences was recently awarded ARC funding for research aimed at understanding the forces that drive the motion of the Earth’s tectonic plates and the distribution of stresses in the Earth’s crust that give rise to great earthquakes such as the magnitude 9 Boxing Day Sumatran quake.\n\nProfessor Sandiford says the research shows that as much as 10 per cent of the huge amounts of energy being created at plate connection points at Sumatra and Java are being transferred back into our plate and causing major stresses.\n\n“This is enough stress to contribute to mild earthquake activity in the central regions of the plate, such as in the Australian continent or central Indian Ocean, and provides us with clues as to why our plate has been slowly breaking up,” he says.\n\n“The Indian Ocean quakes are, in effect, leading to the active rupture of the Indo-Australian plate into separate Indian and Australian plates. This new research provides us with important information about the stresses that are driving this drawn out tectonic plate divorce.”\n\nThe research, which was conducted in collaboration with Wouter Pieter Schellart of the Australian National University and David Coblentz of the Los Alamos National Laboratory in the US, will be published in the journal Geology (27 January).\n\nThe research is also important for understanding why smaller intra-plate earthquakes such as the 1989 Newcastle quake, which occurred nowhere near the edge of the plate, take place. Up to now, why earthquakes occur in apparently safe zones in the centre of plates has not been very well understood.\n\nProfessor Sandiford says, “Earthquakes such as the 1989 Newcastle quake that killed 13 people and caused more than $1 billion in damages are just one manifestation of mild tectonic activity that has been affecting the Australian continent for the last 5-10 million years.”\n\nThe new research shows that stresses originating at points of collision between two plates are being dissipated back into our plate and generating enormous internal stresses.\n\nThe ARC funded project will map the spatial and temporal pattern of this tectonic activity and relate it to the factors that drive the motion of the Indo-Australian plate.\n\n“This research will contribute to our understanding of the factors that drive plate motion, to earthquake risk assessment in Australia and other comparatively stable continental regions, and to the factors that have shaped our distinctive Australian landscapes,” he says.\n\nBACKGROUND INFORMATION\n\nWhat causes tectonic plates to move?\nThe Earth is made up of a series of layers. The outermost layer is called the crust and the innermost is the core. In between lies an area called the mantle (in turn made up of upper and lower mantle), which is arguably the most important when it comes to understanding where big earthquakes occur.\n\nThe outer part of the Earth, comprising the crust and top 100 or so kilometres of the mantle (together called the lithosphere), consists of a collection of eight major plates which almost fit perfectly together. The continents and oceans all lie on these plates, the major ones referred to as the African, Eurasian, Indo-Australian, Antarctic, Philippine, Pacific, Nazca, North American and South American, depending on their geographic location.\n\nThese plates (also referred to as tectonic plates) float on the softer mantle underneath. Convection currents within the upper mantle layer are a major driving force driving plate motion and therefore behind earthquake activity.\n\nThe lower sections of the mantle closest to the molten core of the earth are also the hottest parts of this la
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The Hafele-Keating experiment, though contested, holds up with the physics behind it. In fact, the global positioning system (GPS) in programmed with equations to compensate for the effect of time-dilation caused by the difference in in the gravitational field between the earth's surface and satellite orbit.
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an earthquake happens when tectonic plates move\n\nmountains happen when tectonic plates overlap
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All GPS can tell you is your location on the earth. GPS cannot tell you where your property corners are, unless you already know the coordinates of those property corners. Your GPS unit does not know where your property corners are until you provide it with the information it needs. \n\nIf you knew the coordinates, which could be either latitude and longitude that mappers use, or state plane coordinates that surveyors use, then you could use GPS to guide you to the corner locations. But since you do not know where the corners are, you have no way of entering the required data into the GPS unit. \n\nYou not only need to get a professional surveyor to survey your property, you also need to tell the surveyor that you need him to provide you with the state plane coordinates of those points, so you can enter them into your GPS unit, then you will be able to find them yourself in the future.