classify-anomaly
Classify speleothem anomalies as seismic, climatic, volcanic, or compound events. Use when discriminating earthquake signals from climate/volcanic false positives. Triggers on "classify anomaly", "seismic or climatic", "discrimination", "is this an earthquake".
npx skills add majiayu000/claude-skill-registry --skill classify-anomaly-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.
# /classify-anomaly - Multi-Proxy Discrimination Skill ## Purpose Apply the multi-proxy discrimination framework to classify geochemical anomalies as SEISMIC, CLIMATIC, VOLCANIC, or COMPOUND (CVSE). This is the core methodology for distinguishing earthquake signals from false positives. ## Usage ``` /classify-anomaly <d18O_z> <d13C_z> [--MgCa Z] [--recovery YEARS] [--date YEAR] ``` **Examples:** ``` /classify-anomaly -2.46 +1.60 # Basic two-proxy /classify-anomaly -2.16 N/A --MgCa +1.60 # Missing δ13C, use Mg/Ca /classify-anomaly -3.77 -1.18 --date 1275 # Check volcanic correlation /classify-anomaly -3.6 -2.36 --recovery 46 # With recovery time ``` ## Discrimination Framework ### Primary Decision Tree ``` Is there a significant anomaly (|z| ≥ 2.0)? ├─ NO → NORMAL (no event detected) └─ YES → Check proxy coupling... │ ├─ COUPLED (δ18O and δ13C both anomalous, same sign) │ └─ Coupling ratio < 2.0 → **SEISMIC CANDIDATE** │ ├─ DECOUPLED (δ18O anomalous, δ13C normal or opposite) │ ├─ Volcanic correlation? → **VOLCANIC** │ └─ No volcanic correlation → **CLIMATIC** (drought/wet) │ └─ δ13C ONLY anomalous (δ18O normal) └─ Check geogenic CO₂ sources → **SEISMIC CANDIDATE** ``` ### Proxy Rule
- Purpose
- Usage
- Discrimination Framework
- Primary Decision Tree
- Proxy Rules
- Coupling Ratio Calculation
- Recovery Time Assessment
- Temporal Shape (Mg/Ca)
- Classification Output
- Evidence Tiers
- Volcanic Correlation Check
- Output Classifications
- CVSE (Compound Volcanic-Seismic Event) Criteria
- Example Full Analysis
What does the classify-anomaly skill do?
Classify speleothem anomalies as seismic, climatic, volcanic, or compound events. Use when discriminating earthquake signals from climate/volcanic false positives. Triggers on "classify anomaly", "seismic or climatic", "discrimination", "is this an earthquake".
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill classify-anomaly-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.