seismic-analysis

seismic-analysis is a skill for Claude Code from iowarp/clio-kit. It costs 50 tokens per session (994 once invoked), scanned A, original, BSD-3-Clause.

A guide to examining earthquake recordings and saved earthquake event lists. SAC is a file format for seismic waveforms, which record ground motion over time; an event catalogue lists earthquakes with details such as time, location, and magnitude.

In plain words
What is it for?
Use it to inspect SAC files or archives, calculate waveform statistics, plot traces, and analyze or plot saved earthquake sequences, including magnitude-frequency measures.
Why use it?
It prevents using waveform tools on event catalogues or catalogue tools on waveform files. These are different kinds of data and support different analyses.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the clio-geoscience-skills plugin — 3 skills shipped together

Good fit Use it to inspect SAC files or archives, calculate waveform statistics, plot traces, and analyze or plot saved earthquake sequences, including magnitude-frequency measures.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/iowarp/clio-kit/seismic-analysis
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add iowarp/clio-kit --skill seismic-analysis
Clone the repo
git clone --depth 1 https://github.com/iowarp/clio-kit

Made for: Claude Code.

Or install clio-geoscience-skills, the plugin that ships this one along with the rest of its 3 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for seismic-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/iowarp/clio-kit/seismic-analysis/github.svg)](https://agentmods.dev/skills/iowarp/clio-kit/seismic-analysis)
Your own site
<a href="https://agentmods.dev/skills/iowarp/clio-kit/seismic-analysis"><img src="https://agentmods.dev/badge/skills/iowarp/clio-kit/seismic-analysis/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for seismic-analysis

Your own site · 80×15
<a href="https://agentmods.dev/skills/iowarp/clio-kit/seismic-analysis"><img src="https://agentmods.dev/badge/skills/iowarp/clio-kit/seismic-analysis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 994 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00050 $0.00994
Opus 5.5 $0.00020 $0.00398
Sonnet 5.5 $0.00010 $0.00199
Haiku 4.5 $0.00005 $0.00099

Measured 9d ago against content hash b41a481931db, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

seismic-analysis scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/clio-geoscience-skills/skills/seismic-analysis/SKILL.md · 92 lines

How it starts

The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Seismic Analysis

One server answers questions about earthquakes, but its tools split across two completely different kinds of input. Handing a tool the other kind fails in confusing ways, and the shared server name makes that easy to do.

  • Waveform tools (inspect_archive, compute_trace_statistics, plot_traces) read SAC files or TAR archives of them, holding ground motion sampled over time at a station.
  • Catalog tools (analyze_sequence, plot_sequence) read a saved earthquake catalog: a list of events with locations, times and magnitudes.

A catalog is not derived from waveforms by these tools. If you have waveforms and the question is about b-values, the catalog is a separate input you do not have yet.

Waveforms

1. Look inside the archive. clio-seismology:inspect_archive summarises a SAC file or TAR archive: member count, a sample of names and sizes, and the inferred stations. Do this first — an archive can hold hundreds of traces, and station coverage decides which questions are answerable.

2. Get the numbers. clio-seismology:compute_trace_statistics returns per-trace amplitude statistics (min, max, mean, std, peak_abs) with header metadata: npts, delta_s, begin_s, end_s.

The header fields matter more than the amplitudes. delta_s is the sample interval — traces with different delta_s are not directly comparable, and comparing peak amplitudes across stations without accounting for instrument response compares instruments as much as ground motion.

3. Plot. clio-seismology:plot_traces writes a PNG with traces amplitude-normalised and vertically offset. Normalised is the key word: the figure shows shape and timing, not relative size. Do not read amplitude comparisons off it — that is what step 2 is for.

Catalogs

clio-seismology:analyze_sequence computes the descriptive statistics of a saved catalog: completeness magnitude (Mc), the Gutenberg-Richter b-value with uncertainty, and the largest events.

Read the full file on GitHub · 92 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 92 lines · 50 tokens per session scan A b41a481931db

Subscribe to this mod's changes

seismic-analysis is a skill published in the GitHub repository iowarp/clio-kit (30 stars, last pushed 8d ago), licensed BSD-3-Clause. It adds 50 tokens to every session and 994 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-08.

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