Sounds exactly like what I've been trying to get rid of for the past 2 months. What a weird feeling! I am a good stretch North of you though.

It started a week ago, building slowly. I thought it went away after 2 days of sleeping 10 hours or so in a row. I even up'd the dose of SSKI a little during that time and it seemed to go away. I've started doing more vitamin C hourly in hopes of getting rid of it. I've also tried H2O2 (hydrogen peroxide) in the ears, but there's very little fizzing. An ear infection usually fizzles a lot comparatively. It feels more like inflammation of the canal or inner ear area. It affects hearing slightly, but not very much.

http://biophysics.50megs.com/guest_book.html

There is a harmonic relationship between the earth and our mind/bodies. Earth's low frequency isoelectric field, the magnetic field of the earth, and the electrostatic field which emerges from our bodies are closely interwoven. Our internal rhythms interact with external rhythms, affecting our balance, REM patterns, health, and mental focus. SR waves probably help regulate our bodies' internal clocks, affecting sleep/dream patterns, arousal patterns, and hormonal secretion.

The rhythms and pulsations of the human brain mirror those of the resonant properties of the terrestrial cavity, which functions as a waveguide. This natural frequency pulsation is not a fixed number, but an average of global readings, much like EEG is an average of brainwave readings. SR actually fluctuates, like brainwaves, due to geographical location, lightning, solar flares, atmospheric ionization and daily cycles.

The most important slow rhythm is the daily rhythm sensed directly as change of light. Rhythms connected with the daily rhythm are called circadian (an example is pineal gland melatonin secretion). Some experiments in the absence of natural light have shown that the basic human "clock" is actually slightly longer than one day, and closer to one lunar day (24h 50min). The lunar day has a similar period (24h 50min).

On a slower scale, a strong influence on the Earth is its geomagnetic field, which is influenced by the following periods: the Moon's rotation (29.5 days); the Earth's rotation (365.25 days); Sun spots (11 and 22 years); the nutation cycle (18.6 years); the rotation of the planets (88 days to 247.7 years); and all the way out to the galaxy's rotation cycle (250 million years).
Very important rhythms are in the order of 1-2 hours, like hormone secretion, and dominant nostril exchange. In the range of human EEG, we have the Sun's electromagnetic oscillation of 10Hz, while the Earth-ionosphere SR system is resonant at frequencies in the theta, alpha, beta1 and beta2 bands.

Different species often have internal generators of environmental rhythms, which can be extremely precise, up to 10 -4. The frequency of these oscillators is then phase locked loop (PLL) synchronized with the natural rhythms. Environmental synchronization sources are often called "zeitgebers." The mechanism of optical synchronization can be shown. The presented rhythms should inspire a better understanding of the interaction of internal and external rhythms during specific states of consciousness.

This bioelectrical domain is geared to thalamocortical generation of rhythmic activity. In neurofeedback, what is being trained is the degree of rhythmicity of the thalamocortical regulatory circuitry. Rhythmicity manages the entire range of activation and arousal in the bio-electrical domain. One role advocated for rhythmic activity is that of time binding, the need for harnessing brain electrical activity which is spatially distributed while maintaining it as a single entity. Brainwaves indicate the arousal dimension, and arousal mediates a number of conditions. Changes in sympathetic and parasympathetic arousal "tunes" the nervous system.

Underarousal leads toward Unipolar or Reactive Depression, Attention Deficit Disorder, chronic pain and insomnia. Overarousal is linked with anxiety disorders, sleep onset problems, nightmares, hypervigilance, impulsive behavior, anger/aggression, agitated depression, chronic nerve pain and spasticity. A combination of under- and overarousal causes anxiety and depression, as well as ADHD. Instabilities in certain rhythms can be correlated with tics, obsessive-compulsive disorder, aggressive behavior, rage, bruxism, panic attacks, bipolar disorder, migraines, narcolepsy, epilepsy, sleep apnea, vertigo, tinnitus, anorexia/bulimia, suicidal ideation and behavior, PMS, multiple chemical sensitivities, diabetes, hypoglycemia, and explosive behavior.

Much more at the link (above).