Boulder Creek, California, USA (37.1°N, 122.1°W)
HeartMath Institute, Global Coherence Initiative
Right now
California: 65 · global avg: 60
Louder than: Tomsk (45), Cumiana (35)
Quieter than: Alberta (85)
Latest Spectrogram
This past week at the California station has been pretty active, with a nice peak of 85! We had a few quieter days mixed in, but one reading really stood out, going above 80, which is always interesting to see. Overall, a solid week of Schumann Resonance activity.
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Each cell is one UTC hour. Click any active cell to explore that day.
Notable events (last 30 days)
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85
View day →2026-06-29
The rightmost portion of the spectrogram displays intense yellow and white coloration, signifying high amplitude acro…
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75
View day →2026-07-01
The rightmost portion of the spectrogram displays high-intensity yellow and white bands, confirming strong resonance …
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75
View day →2026-06-28
The rightmost portion of the spectrogram shows sustained, high-intensity yellow bands across the first three Schumann…
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75
View day →2026-06-27
The rightmost portion of the chart shows persistent, high-intensity yellow and white coloration across the lower freq…
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75
View day →2026-06-22
The rightmost portion of the chart shows sustained high-intensity activity, with the fundamental frequency and the se…
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75
View day →2026-06-18
The rightmost edge of the spectrogram shows high-intensity, wide-band activity across the 7-25 Hz range. The PSD pane…
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75
View day →2026-06-16
The rightmost portion of the spectrogram shows sustained high-intensity activity across the first three Schumann harm…
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75
View day →2026-06-07
The rightmost portion of the spectrogram shows persistent, high-intensity horizontal banding across the lower frequen…
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72
View day →2026-07-06
The rightmost portion of the chart shows sustained high-intensity yellow and white coloring across the lower harmonic…
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72
View day →2026-07-05
The rightmost portion of the spectrogram shows sustained high-intensity activity across the first three Schumann harm…
Last 14 days
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Open calendarGCI001 — heart of the global coherence network
GCI001 is part of HeartMath Institute's Global Coherence Initiative (Boulder Creek, California), a network designed to monitor how geomagnetic activity correlates with human physiology and collective coherence.
Unlike traditional academic stations, GCI sites are tuned for wellness research — exploring how magnetic field fluctuations affect sleep, mood, and heart rate variability.
Its daily spectrograms capture both Schumann resonance harmonics and ultra-low-frequency (ULF) activity, giving a holistic picture of the local electromagnetic environment. Visit nocc.heartmath.org
Trust & authority
HeartMath Institute, Global Coherence Initiative
Operating since 2008 · 18 years of continuous monitoring
Frequently asked questions
How does GCI001 measure Schumann resonance?
GCI001 uses a magnetometer tuned for ULF/ELF frequencies (0–50 Hz). It produces a daily 24-hour spectrogram showing Schumann harmonics alongside ultra-low-frequency activity relevant to wellness research.
Why is GCI001 important to our network?
GCI001 is part of HeartMath Institute's Global Coherence Initiative, a network specifically designed to study how geomagnetic activity correlates with human physiology. It brings a wellness-research perspective absent from purely academic stations.
When was its last major event?
Check the Notable events section above — it lists the top 10 highest-score events at GCI001 from the last 30 days, each linked to the full daily report.
How reliable is the data?
GCI001 is operated by the HeartMath Institute, a nonprofit research organization studying the interconnection between human physiology and Earth's magnetic field. The Global Coherence Initiative has been running since 2008 and publishes peer-reviewed research.
Where does the raw data come from?
Raw daily spectrograms come from nocc.heartmath.org. We fetch the latest plot once per day after publication. Visit heartmath.org/gci for the full Global Coherence Initiative program and research.
