QC filter: require >= 4 P and >= 4 S picks (was > 4 / >= 5)

[mdenolle]

⚠️ This changes a published catalog output

The QC threshold filter used p_picks > 4 & s_picks > 4, i.e. it required ≥5 P and ≥5 S picks — but the output file is named ..._p_4_s_4_... and the methods describe a minimum of 4. Per decision, change the code to match the documented (and more generous) ≥4 threshold.

Effect: events with exactly 4 P and/or exactly 4 S picks (and RMS < 2.5) now pass QC. The filtered catalog origin_2010_2015_reloc_cog_ver3_cc_p_4_s_4_rms_2_5.csv will contain more events. The notebook must be re-run to regenerate that CSV — this PR only changes the code, not the CSV.

Change

(df.p_picks > 4) & (df.s_picks > 4) → (df.p_picks >= 4) & (df.s_picks >= 4)

Applied to the active filter, the plot title (P and S Picks > 4 → >= 4), and the commented gap-filter variant, in both tracked copies:

• 3_post_processing/qc_metrics_all_regions_reloc_cog_ver3_cc.ipynb
• 4_relocation/quality_control/qc_metrics_all_regions_reloc_cog_ver3_cc.ipynb

Diff is 10 lines per file; embedded outputs untouched.

Notes

• A third, untracked duplicate 4_relocation/qc_metrics_all_regions_reloc_cog_ver3_cc.ipynb exists in the working tree with the old > 4 threshold. It is not in version control; recommend deleting it or consolidating the three copies so they can't diverge.
• Independent of Fix low-risk QC/post-processing bugs (no catalog outputs change) #8 (low-risk display/crash fixes); both can merge separately.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Updates the QC pick-count threshold in the two tracked qc_metrics_all_regions_reloc_cog_ver3_cc.ipynb notebooks so the implemented filter matches the documented/catalog-naming intent of “minimum 4” picks.

Changes:

• Changed the QC filter from (p_picks > 4) & (s_picks > 4) to (p_picks >= 4) & (s_picks >= 4) (keeping rms < 2.5 unchanged).
• Updated the corresponding plot header/title strings from > 4 to >= 4.
• Updated the commented “gap-filter” variant to use the same >= 4 threshold.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
4_relocation/quality_control/qc_metrics_all_regions_reloc_cog_ver3_cc.ipynb	Updates the active QC filter, plot title, and commented gap-filter variant to require ≥4 P/S picks.
3_post_processing/qc_metrics_all_regions_reloc_cog_ver3_cc.ipynb	Mirrors the same QC threshold/title updates in the post-processing copy of the notebook.

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