# Data Dictionary - US Crude Inventory Surprise / Momentum - derived Parquet

**Units:** all `surprise_mbbl` values are in **MMbbl**.  Times are UTC.

| column | type | description |
|---|---|---|
| `zone` | str | Always US |
| `ts` | timestamp (UTC) | Report week |
| `surprise_mbbl` | float | Stocks - trailing 4-wk MA, million barrels |
| `unit` | str | Unit |
| `res_min` | int | Native resolution (weekly = 10080) |

*Source: U.S. Energy Information Administration (EIA).*