zscore
Calculate z-scores for speleothem geochemical data. Use when analyzing cave isotope anomalies, finding significant deviations, or identifying potential earthquake signals. Triggers on "zscore", "calculate z", "anomaly analysis", "find anomalies".
npx skills add majiayu000/claude-skill-registry --skill zscore-drsatsuma1-speleoseismology --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# /zscore - Quick Z-Score Analysis Skill ## Purpose Rapidly calculate z-scores for speleothem δ18O, δ13C, and other proxy data to identify significant anomalies. This is the core analysis workflow used multiple times per session. ## Usage ``` /zscore <cave_name_or_entity_id> [--start YEAR] [--end YEAR] [--proxy PROXY] [--threshold Z] ``` **Examples:** ``` /zscore YOKI # All Yok Balum data /zscore CRC-3 --start 1850 --end 1950 # Crystal Cave 1850-1950 /zscore "Bàsura" --proxy d18O,d13C # Multiple proxies /zscore 390 --threshold 2.5 # Higher significance threshold ``` ## Workflow ### Step 1: Get Cave Data Use MCP tools to retrieve data: ``` # Search for cave sisal_search_caves region="Italy" min_samples=50 # Get samples for specific entity sisal_get_samples entity_id="123" ``` ### Step 2: Extract Proxy Measurements From the returned data, extract: - `d18O_measurement` - Oxygen isotope values (‰ VPDB) - `d13C_measurement` - Carbon isotope values (‰ VPDB) - `interp_age` - Interpolated age (years BP) - `year_CE` - Calendar year (1950 - interp_age) ### Step 3: Calculate Baseline Statistics For the full record (or specified baseline period): ``` δ18O: μ = mean(d18O), σ = std(d18O) δ13C: μ
- Purpose
- Usage
- Workflow
- Step 1: Get Cave Data
- Step 2: Extract Proxy Measurements
- Step 3: Calculate Baseline Statistics
- Step 4: Calculate Z-Scores
- Step 5: Identify Anomalies
- Step 6: Generate Output Table
- Interpretation Guidelines
- δ18O Anomalies
- δ13C Anomalies
- Coupled vs Decoupled
- Output Format
What does the zscore skill do?
Calculate z-scores for speleothem geochemical data. Use when analyzing cave isotope anomalies, finding significant deviations, or identifying potential earthquake signals. Triggers on "zscore", "calculate z", "anomaly analysis", "find anomalies".
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill zscore-drsatsuma1-speleoseismology --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.