orphan-analysis
Identify orphan earthquakes far from mapped faults that indicate unmapped active structures. Use when analyzing microseismicity, finding dark earthquake source faults, or validating fault database gaps. Triggers on "orphan analysis", "unmapped fault", "microseismicity", "fault gap".
npx skills add majiayu000/claude-skill-registry --skill orphan-analysis-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.
# /orphan-analysis - Orphan Earthquake Detection Skill ## Purpose Identify "orphan earthquakes" - seismic events far from any mapped fault - that indicate unmapped active structures. These structures may be sources of historical "dark earthquakes" detectable in speleothem records. ## Usage ``` /orphan-analysis <lat> <lon> [--name NAME] [--radius KM] [--orphan-threshold KM] ``` **Examples:** ``` /orphan-analysis 44.13 8.11 --name "Bàsura Cave" /orphan-analysis 41.42 31.93 --name "Sofular Cave" --radius 150 /orphan-analysis 16.2 -89.1 --name "Yok Balum" --orphan-threshold 30 ``` ## Methodology ### Validated in Italy The orphan analysis methodology was validated in the Ligurian Alps: - **80% orphan rate** revealed unmapped NNW-trending fault - **193+ earthquakes** on structure not in ANY database - **25+ km lineament** identified via DEM + microseismicity - Now primary candidate for 1285/1394 dark earthquakes ## Workflow ### Step 1: Search Earthquake Catalog Use `earthquake_search` MCP tool: ``` earthquake_search lat=44.13 lon=8.11 radius_km=100 min_magnitude=2.0 ``` **Parameters:** - Default radius: 100 km - Default min_magnitude: 2.0 (for microseismicity) - Date range: 1900-present
- Purpose
- Usage
- Methodology
- Validated in Italy
- Workflow
- Step 1: Search Earthquake Catalog
- Step 2: Load Fault Database
- Step 3: Calculate Distances
- Step 4: Classify Orphans
- Step 5: Cluster Orphans by Azimuth
- Step 6: Generate Report
- Output Files
- MCP Tools Used
- Example: Italy Bàsura Results
What does the orphan-analysis skill do?
Identify orphan earthquakes far from mapped faults that indicate unmapped active structures. Use when analyzing microseismicity, finding dark earthquake source faults, or validating fault database gaps. Triggers on "orphan analysis", "unmapped fault", "microseismicity", "fault gap".
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill orphan-analysis-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.