Most likely. What you are seeing is the effect of your TV being subjected to a magnetic field. To solve your problem, first try going to the menu with your remote and use the degauss feature. You should hear a familiar noise, the "bong" that you hear when turning the unit on. You might find that the discoloration improves only slightly; if this happens, don't get discouraged. Wait 30 minutes and try again. You might cure it if you degauss several times while it is in this location.
If this doesn't work, try powering it off and unplugging it. Then, move it to a new location, plug it in and power it on. Leave it on and observe it for about 30 minutes. If you find the discoloration goes away, then you will know there is a strong magnetic field near the previous location. You will have to scout around for things like power lines, cables, other appliances, speakers, or anything else that may be causing this strong magnetic field, then eliminate it. Alternatively, you could use the TV in this new location. You may also need to degauss at this new location; take note of any pattern, it might have discoloration in different places after you move it.
If neither of these fix your problem, it is possible the TV itself is the source of the field. This gets more complicated, but it should still be possible. Speakers are a common source of magnetic fields. If you have alternate means for audio, you can remove the speakers from the enclosure. It may also be possible to use newer speakers that do not interfere with the tube. Finally, permanently discolored screens can be fixed with a very strong magnet, or a degaussing wand. These options are what I consider a last resort however, as they can be tricky fixes to work with, and can possibly harm the image/screen even more.