# 📐  L2 Spec — Earthquake Source Inversion — finite-fault slip Mismatch-Only Spec

**ID:** `L2-278-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-278`](/artifact/l1/L1-278)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554055

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| Snr db | dB | 0 – 40 |
| N samples | — | 100 – 65536 |
| N stations | — | 5 – 1000 |
| N subfaults | — | 10 – 10000 |
| Fault geometry error | — | 0.0 – 0.3 |
| Green function error | — | 0.0 – 0.3 |
| Rupture velocity error | — | 0.0 – 0.3 |

## 2. Tolerance (ε)

**Type:** `fn`

```
50.0 - 0.3*SNR_dB - 80.0*green_function_error - 50.0*rupture_velocity_error - 40.0*fault_geometry_error + 25
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |

## 4. Fingerprint

`6f5685d362bf5b3fc2917a5a284fca6c2175f0759edca81767831a33da090230`

## 5. On-chain Registration

- **Chain hash:** `0x232d6980815697172b5ca7609eb52f6af02774edfe9d6c348dd407a667a6bf92`
- **Chain tx hash:** `0x79f2302c56701dad15bb0c87f1d5b246d0aa778dda7a71cd86b3492b420c39df`
- **Chain block:** `41554055`

---

## File Mapping

This bundle consists of: `L2-278-001.md`, `L2-278-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-278-001.md` | Source of truth — edit this | Human or LLM |
| `L2-278-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |

**Prompt for your LLM after editing this Markdown:**

> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.

_This Markdown was auto-synthesized from the catalog row for `L2-278-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._