Boulder Creek, California, USA (37.1°N, 122.1°W)
HeartMath Institute, Global Coherence Initiative
Right now
California: 65 · global avg: 57
Louder than: Etna (45), Cumiana (45), Eskdalemuir (55)
Quieter than: Tomsk (75)
Latest Spectrogram
This past week at our California station has been pretty steady, with a nice peak activity of 75, but nothing too wild, as we didn't go above 80. It seems like things were generally quite calm and consistent, with an average score of 69.
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See your day30-day hourly activity
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 →2026-09-15
The rightmost portion of the spectrogram shows high-intensity yellow and white coloration, indicating strong power ac…
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75
View day →2026-10-02
The rightmost portion of the spectrogram shows sustained, high-intensity horizontal banding across the lower frequenc…
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75
View day →2026-09-26
The rightmost portion of the chart shows sustained high-intensity activity with broadened, bright horizontal bands ac…
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75
View day →2026-09-11
The rightmost portion of the spectrogram displays high-intensity, wide horizontal bands indicating elevated electroma…
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75
View day →2026-09-10
The rightmost portion of the spectrogram shows a significant shift toward yellow and white, indicating high-intensity…
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75
View day →2026-09-08
The rightmost portion of the spectrogram exhibits a shift from moderate pink/purple tones to intense yellow/white, in…
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72
View day →2026-10-03
The rightmost portion of the spectrogram shows sustained, high-intensity yellow and pink horizontal bands across the …
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72
View day →2026-10-01
The rightmost edge of the spectrogram shows sustained high-intensity yellow and white coloring across the lower frequ…
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72
View day →2026-09-28
The rightmost portion of the chart shows sustained high-intensity activity with bright yellow and pink horizontal ban…
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72
View day →2026-09-25
The rightmost portion of the spectrogram displays a shift from baseline blue to high-intensity pink and yellow, indic…
Last 14 days
Quick scan of recent activity — tap a day for the full check-in.
Explore
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Live lunar phase, illumination, and the 2026-2027 full moon calendar.
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.
