Pith Number

pith:OT2FHPSF

pith:2024:OT2FHPSFER2CDS4AKXVBWI5QOY

not attested not anchored not stored refs pending

The Extreme Space Weather Event of 1872 February: Sunspots, Magnetic Disturbance, and Auroral Displays

Ana P. Correia, David M. Willis, Delores J. Knipp, Dorothea Just, Edward W. Cliver, Fr\'ed\'eric Clette, Gianna Cauzzi, Hisashi Hayakawa, Ilaria Ermolli, Jos\'e R. Ribeiro, Keitaro Matsumoto, Kentaro Hattori, Kevin Reardon, Matthew N. Wild, Mikhail Vokhmyanin, Philippe-A. Bourdin, Sam M. Silverman, S\'ean P. Blake, Shin Toriumi, Theodosios Chatzistergos, Yoshizumi Miyoshi, Yusuke Ebihara

arxiv:2501.00176 v1 · 2024-12-30 · astro-ph.SR · astro-ph.EP · physics.geo-ph · physics.plasm-ph · physics.space-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OT2FHPSFER2CDS4AKXVBWI5QOY}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T09:55:40.342457Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74f453be45247421cb8055ea1b23b0761eb623fdbc550d9ebc5ee4afa2b4493b

Aliases

arxiv: 2501.00176 · arxiv_version: 2501.00176v1 · doi: 10.48550/arxiv.2501.00176 · pith_short_12: OT2FHPSFER2C · pith_short_16: OT2FHPSFER2CDS4A · pith_short_8: OT2FHPSF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/OT2FHPSFER2CDS4AKXVBWI5QOY \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 74f453be45247421cb8055ea1b23b0761eb623fdbc550d9ebc5ee4afa2b4493b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc1bf99d3a9c453e0680f83428a4cceeb55092ddce2a5d32b8ca9f954714850a",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "physics.geo-ph",
      "physics.plasm-ph",
      "physics.space-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2024-12-30T23:06:11Z",
    "title_canon_sha256": "4ca2d72bf11e8614310f5e8466039df21aa41c92d94531e8ede8c75cba78eff2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.00176",
    "kind": "arxiv",
    "version": 1
  }
}