Port Activity Declines in Port of Surabaya
What happened
satellite optical and thermal analysis shows 5% reduction in activity at Port of Surabaya (Tanjung Perak) over a 21 day window (2026 06 08 to 2026 06 29).
Why it matters
Declining throughput indicates weakening export demand ahead of official trade statistics.
Historical pattern
Across the Stamper One corpus, port activity contractions of this kind have shown magnitude-confirmed directional alignment at 7 days in 57.4% of resolved historical observations (n 3,893, 95% CI 55.9-59.0%). This is an observation, not a forecast.
What we are watching
- Adjacent port zone activity patterns
- Shipping lane throughput confirmation
- Company supply chain exposure
- Follow-through in subsequent observation windows
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