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What the picker changes
  • Top topics digest — the cards score the selected period against the prior 4 weeks.
  • 12-week heatmap & outlet matrix — show the 12 weeks ending at the selected week (they slide back with the picker, they aren’t a fixed snapshot).
  • Per-topic volume / alias drift — same 12-week trailing window, anchored on the selected period.
  • Coverage gap quadrant — scores the selected period against the 12 weeks before it (not including it).
  • Anomaly cards — only show alerts the detector fired during the selected period. Quiet weeks legitimately show none.
What stays as-is
  • Outlet orientation strip / lean colours — context-only, drawn from the last 12 weeks of activity regardless.
  • Co-occurrence graph — recent-activity anchored, not picker-driven.
  • Source & topic profiles — all-time data for the topic; the picker doesn’t affect them.
Rolling 7 days is a sliding live window for “current vibes”; switch to Weekly to compare specific weeks side-by-side.
Weekly Rolling 7 days
live window
Press topic

Drain Flushing Operation

2 articles · 2 aliases in press · peaked week of 19 Jul 2026 · first seen 21 Jul 2026

a coordinated effort to flush out hazardous substances from wastewater networks

The stories behind this signal

across press, releases & commentary · links open at the source
News Tuakau residents evacuated after hazardous chemical enters drains RNZ · 21 JulRead ↗ News Evacuations in Tūākau after 'unknown chemical' enters drains 1News (TVNZ) · 21 JulRead ↗

Sample framings

Up to 12 framings across outlets and orientations — each a short phrase the extractor generated to characterise the piece's editorial angle (not a quote). Filter by lean to see how each bloc is spinning the story; click through to read the original.

rnz Centre

systematic clearing of contaminated pipes

Tuakau residents evacuated after hazardous chemical enters drains
21 Jul
tvnz Centre

coordinated effort to clear contaminated waterways

Evacuations in Tūākau after 'unknown chemical' enters drains
21 Jul

Coverage by outlet lean Methodology →

Stacked weekly counts; colour by editorial lean. Stuff and The Spinoff lean centre-left, NZ Herald centre-right, others centre.

Alias drift

How press outlets have named this topic, week by week.

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Recent headlines

Most recent 2 articles linking to this topic.

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