Do geomagnetic storms really affect your body?
The honest answer has three layers: population associations, mechanistic hypotheses, and, for individual causation, no evidence.
Layer 1: population-level links (fairly solid)
Multiple epidemiological studies find statistical associations at the population level:
- MI and acute coronary syndrome admissions rise during strong storms (meta-analysis RR 1.3-1.5)A
- 28 of 36 studies report significant cardiovascular links; stroke risk up to +52% in severe stormsA
- Brazil national data: MI admissions and deaths rise on disturbed days, more in womenB
- Blood-pressure fluctuations track geomagnetic activity in Qingdao/Weihai cohorts, unexplained by temperature or PM2.5B
Layer 2: mechanistic hypotheses (interesting, unproven)
Pineal melatonin synthesis disturbed by field fluctuations → sleep/circadian shifts; heart rate synchronizes with millihertz geomagnetic oscillations during storm recovery (2 volunteers, 61 ECGs)B; magnetite-nanoparticle magnetoreception in human brainsC. These are legitimate research directions, not conclusions.
Layer 3: your individual causation (the honest edge)
No tool, study or app can determine whether your headache was caused by a storm. If you sleep badly on a storm night, log it; check the mirror in 30 days. Maybe it correlates, maybe not. Both are valid answers. For emergencies (chest pain, severe headache, neurological symptoms) seek immediate medical care; that has nothing to do with space weather.
Readers ask
Is insomnia during a storm normal?
Population data suggest weak links between strong storms and sleep-metric shifts, with huge individual variation. Recording beats worrying.
Should I take melatonin or buy magnetic-therapy products?
This site recommends no drugs or devices. Magnetic-therapy products lack evidence; most 'frequency healing' sellers are harvesting wallets.
How high is 'strong' Kp?
Kp≥5 is the active/storm threshold (NOAA G1), Kp≥7 strong (G2+), Kp=9 extreme (a few times per century).