quakes.xtl

1⍝# Earthquakes of a week: the USGS feed of magnitude 2.5 and up, saved
2⍝# 2026-10-06 (demos/data/PROVENANCE.txt), checked against its SHA-256,
3⍝# into SQLite; SQL selects and groups, X_eTaL computes (the
4⍝# magnitude-frequency law), pictures show it.
5⍝# Run: just demo http quakes   (pictures go to work/draw/; the live
6⍝# feed: just live-quakes)
7
8ᵈᵍ⁼u̲se< "Digest"
9ˢᵉ⁼u̲se< "Seismic"
10
11csv ← "demos/data/quakes-2.5-week.csv"
12"the saved copy is unchanged (its SHA-256 matches):"
13(ᵈᵍs̲ha256File csv) m̲atch "80454e4268b6ed6f2a5e448038303e4a2a994012d445f3e2efc3da2c825173c5"
14ˢᵉr̲eport csv