Pith Number

pith:NYC3XVUY

pith:2018:NYC3XVUYT4LWD2WF3IOUM2YTQD

not attested not anchored not stored refs pending

The Great Space Weather Event during February 1872 Recorded in East Asia

Alessandra S. Giunta, David M. Willis, Hisashi Hayakawa, Kazunari Shibata, Kentaro Hattori, Lee T. Macdonald, Matthew N. Wild, Sam M. Silverman, Satoshi Hayakawa, Shin Toriumi, Yasuyuki Mitsuma, Yusuke Ebihara

arxiv:1807.05186 v1 · 2018-07-12 · physics.space-ph · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NYC3XVUYT4LWD2WF3IOUM2YTQD}

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	2026-05-18T00:10:48.562217Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6e05bbd6989f1761eac5da1d466b1380ef726285fce0e8f766e4791d28f7d587

Aliases

arxiv: 1807.05186 · arxiv_version: 1807.05186v1 · doi: 10.48550/arxiv.1807.05186 · pith_short_12: NYC3XVUYT4LW · pith_short_16: NYC3XVUYT4LWD2WF · pith_short_8: NYC3XVUY

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/NYC3XVUYT4LWD2WF3IOUM2YTQD \
  | 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: 6e05bbd6989f1761eac5da1d466b1380ef726285fce0e8f766e4791d28f7d587

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b6d97f26c1927d40ea5b9aba71746b324e980bcb3dd1fbbabe8c98a73096492e",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.space-ph",
    "submitted_at": "2018-07-12T11:05:34Z",
    "title_canon_sha256": "01a2f42d147218de43e17902543cb1a370c3aeaa56a37be7806aab2d64b919a1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.05186",
    "kind": "arxiv",
    "version": 1
  }
}