Schumann Resonance and Sleep: What the Research Actually Shows
What published studies say about geomagnetic activity, melatonin and sleep, what they do not say about the 7.83 Hz resonance itself, and what is worth doing on a stormy night. Every claim below links to its source.
The Schumann resonance is a set of natural electromagnetic waves around Earth, with its lowest peak near 7.83 Hz. We found no study showing that the natural resonance itself changes human sleep. What exists is a small body of research linking geomagnetic storms, which also disturb the resonance, to lower night-time melatonin in some groups of workers. Those links are statistical, the mechanism is unproven, and the ordinary sleep habits recommended by health agencies are the better place to start.
What the Schumann resonance is
The Schumann resonance is a set of electromagnetic waves trapped between the ground and the lower edge of the ionosphere. Lightning keeps them going: around the world there are about 50 lightning flashes every second, and their low frequency radio waves circle the planet and reinforce each other at a few preferred frequencies (Price 2016).
The lowest of these peaks sits near 7.8 Hz. The next ones follow at roughly 14, 20, 26 and 32 to 33 Hz. The long term averages measured in Tomsk, Siberia, since 1997 are 7.75, 14.17, 20.23 and 25.88 Hz for the first four (sos70.ru).
The field is very weak. Price (2016) gives its strength in millivolts per metre for the electric part and in picotesla for the magnetic part, compared with about 50,000 nanotesla for Earth’s steady magnetic field. It is not constant either: the peak frequencies shift a little with the time of day and the season (sos70.ru), and by a few tenths of a hertz during strong solar events (Roldugin et al. 2001).
What the published studies show
Geomagnetic storms and melatonin
The most direct evidence comes from two studies by Burch, Reif and Yost. They did not measure the Schumann resonance. They compared geomagnetic activity with a melatonin breakdown product in overnight urine (6-hydroxymelatonin sulfate).
- 1999: In 132 electric utility workers, average overnight excretion of the melatonin marker was lower on days when geomagnetic activity indices over the previous 36 hours were above 30 nanotesla. The drop was larger when high geomagnetic activity came together with higher exposure to 60 Hz magnetic fields or with less exposure to light (Burch et al. 1999).
- 2008: In 153 male utility workers, higher geomagnetic activity was again associated with lower overnight levels of the marker. The strongest associations appeared 15 to 33 hours before the urine sample was collected (Burch et al. 2008).
Melatonin is part of the body’s daily rhythm, so the finding is relevant. But both studies measured a hormone marker in one occupational group. They did not measure sleep itself, and they did not test the Schumann resonance.
What a larger review concluded
Palmer, Rycroft and Cermack (2006) reviewed the research on solar and geomagnetic activity and human health, mainly cardiovascular health (Palmer et al. 2006). Their conclusions are useful because they are careful:
- Some earlier studies held up under their statistical re-analysis, others did not.
- They concluded that a subset of the population, about 10 to 15 percent, appears predisposed to adverse health effects linked to geomagnetic variations.
- Direct effects of natural ELF electric and magnetic fields “appear implausible” to them; “a mechanism involving some form of resonant absorption is more likely”.
- Suppression of melatonin by the pineal gland looked like a “promising contender” for a link, but they found it “unlikely that a single mechanism can explain all of the reported phenomena”.
They also discussed the idea, put forward by Neil Cherry in 2002, that the brain absorbs the Schumann signal. Their verdict: Cherry did not offer a specific biophysical mechanism, and the hypothesis cannot be accepted until one is found.
What this adds up to
The honest summary: there is some evidence that geomagnetic storms go together with lower melatonin output in some people. There is no evidence that the 7.83 Hz resonance is the cause, and a geomagnetic storm changes many things at once. If you want to watch for storms, the Kp index is the more direct measure than any Schumann chart.
What about 7.83 Hz sleep devices?
One randomized, double-blind trial has tested a bedside device sold as a Schumann resonance sleep aid (Huang et al. 2022). The details matter:
- 40 adults with insomnia completed it, 20 with the active device and 20 with an identical device that emitted nothing, for four weeks.
- The device emitted a mix of a 7.83 Hz signal with theta and delta frequency waves. It is an artificial source, not the natural resonance.
- In the active group, sleep lab measurements showed shorter time to fall asleep and longer total sleep. Some self-reported measures, such as overall sleep quality scores and sleep satisfaction, also improved in the placebo group.
- The paper states that the patent licence for the device belongs to one of the authors.
It is one small, short trial with a commercial device. It is worth knowing about, and it is not enough to recommend buying one.
What you can actually do on a stormy night
Start with the basics that are known to matter. The CDC lists going to bed and getting up at the same time every day, a quiet, cool and relaxing bedroom, turning off electronic devices at least 30 minutes before bed, avoiding large meals and alcohol before bedtime, avoiding caffeine in the afternoon and evening, and regular exercise (CDC, About Sleep). None of this depends on space weather.
If you are curious, run your own comparison. Note your sleep for a few weeks next to the daily Kp index. Be careful with conclusions: with only a few storm nights, chance coincidences are easy to mistake for a pattern.
If poor sleep goes on for weeks, talk to a doctor.
Frequently asked questions
Is the Schumann resonance the same every night? No. Its peak frequencies drift a little with the time of day and the season, and its strength follows global thunderstorm activity. During strong solar events the first peak has been measured shifting by a few tenths of a hertz (Roldugin et al. 2001; Zhou and Qiao 2015).
Can I feel 7.83 Hz? We know of no study showing that people can sense the natural resonance. It is far weaker than Earth’s steady magnetic field (Price 2016), and the review by Palmer and colleagues found direct effects of such natural fields implausible.
Does the Schumann resonance cause insomnia? Nothing in the studies above shows that. The melatonin findings relate to geomagnetic activity in general, measured in specific groups of workers.
Where can I see what the resonance is doing right now? The home page shows the live spectrogram from the Tomsk station. Our guide to the current Schumann resonance reading explains how to read it, and Kp index vs Schumann resonance shows how to read the two side by side.
Sources
- Burch, J. B., Reif, J. S., Yost, M. G. (1999). Geomagnetic disturbances are associated with reduced nocturnal excretion of a melatonin metabolite in humans. Neuroscience Letters 266(3), 209 to 212. doi:10.1016/S0304-3940(99)00308-0
- Burch, J. B., Reif, J. S., Yost, M. G. (2008). Geomagnetic activity and human melatonin metabolite excretion. Neuroscience Letters 438(1), 76 to 79. doi:10.1016/j.neulet.2008.04.031
- Palmer, S. J., Rycroft, M. J., Cermack, M. (2006). Solar and geomagnetic activity, extremely low frequency magnetic and electric fields and human health at the Earth’s surface. Surveys in Geophysics 27, 557 to 595. doi:10.1007/s10712-006-9010-7
- Huang, Y.-S. et al. (2022). The Subjective and Objective Improvement of Non-Invasive Treatment of Schumann Resonance in Insomnia: A Randomized and Double-Blinded Study. Nature and Science of Sleep 14, 1113 to 1124. doi:10.2147/NSS.S346941
- Price, C. (2016). ELF Electromagnetic Waves from Lightning: The Schumann Resonances. Atmosphere 7(9), 116. doi:10.3390/atmos7090116
- Roldugin, V. C. et al. (2001). Decrease of the first Schumann resonance frequency during solar proton events. Journal of Geophysical Research 106(A9), 18555 to 18562. doi:10.1029/2000JA900118
- Zhou, H., Qiao, X. (2015). Studies of the variations of the first Schumann resonance frequency during the solar flare on 7 March 2012. Journal of Geophysical Research: Atmospheres 120(10), 4600 to 4612. doi:10.1002/2014JD022696
- Space Observing System 70, Tomsk: history and measured frequencies and seasonal and daily variations (in Russian).
- Centers for Disease Control and Prevention: About Sleep.