Tidal Gauge (SF)

geophysical · 37 views
geophysicalstochastic

What It Is

NOAA CO-OPS water-level series at San Francisco, 6-min sampling. Dominated by the semidiurnal M2 lunar tide (~12.4 h) plus diurnal components.

Interpretation

Standard analysis sees: left-skewed; strongly periodic; time-irreversible (slow rise, sharp collapse). The atlas finds no named structure, but the source is distinctively extreme on Bispectrum:off_diagonal_ratio (-2.7z) — beyond what the standard bank predicts for it. It sits beside Blood Pressure Waveform in the atlas (standard-bank rank 73) — a neighbor conventional features miss.

What standard analysis sees
tail heaviness0.40
asymmetry0.12
occupancy0.81
short-range corr0.83
long-range memory0.69
spectral colour0.25
periodicity0.86
complexity0.19
time-irreversibility0.11
volatility clustering0.83
multifractality0.63
dimensionality0.34
nonstationarity0.64
What the atlas adds
Atlas-extreme metrics the standard bank can’t predict for this source
Bispectrum:off_diagonal_ratio-2.7zbank-miss 1.1σ

Composition

dtypeuint8
range[0, 255]
unique values255 / 16384
mean ± std137 ± 55

Render Gallery

Atlas Position

Nearest neighborDistance
Blood Pressure Waveform3.62cross-origin
Seismograph (ANMO)3.87
Kuramoto Oscillators3.94cross-origin

Open in Atlas →

Which Geometries Light Up

This source does not rank extreme on any metric.

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