The Long Drift / a memory you can play

An atlas
of echoes.

A day can resemble another without repeating it. Choose a point in this archive of Antarctic ground; follow the three closest earlier echoes of its measured period and hum.

Sound is a quiet synthetic sine tone at 1,470 ÷ period Hz, one second per day, with equal volume. It represents the period only. It is not a seismometer recording.

Faint: older daysGold: chosen day · white rings: echoes

Position compares two measurements; connecting lines show selected resemblances. They are not physical routes or causal pathways.

What counts as an echo?

Only archived Palmer Station windows from 12:00–14:00 UTC are compared. A match must be at least seven calendar days earlier. The distance is √((pitch difference in semitones ÷ 2)² + (log₂ hum ratio)²). Thus two semitones and a doubling of hum carry equal weight. These are authored choices, not learned laws. The three closest available days can still be very different.

Missing/nonfinite hum and periods, nonpositive hum, and periods outside 1–100 seconds are excluded. At most the latest 730 valid days are retained. Equal scores are ordered by date. Measurements summarize limited, possibly revised archive windows; resemblance does not identify weather, a cause, or a prediction. Kp and earthquake counts are context and do not influence matching. Lived days are excluded because their stored leaves do not contain comparable hum measurements.

Sources: IU Global Seismographic Network via EarthScope (network DOI); daily magnitude ≥6 quake counts from USGS; Kp from GFZ Potsdam. “Hum” is the inherited ear's quiet-background ground-motion estimate in nm/s; “period” is its inferred swell rhythm, not a direct ocean buoy measurement.