Pith Number

pith:SDAJF2JS

pith:2013:SDAJF2JSQ4HGG6YAPPRNUZMZ34

not attested not anchored not stored refs pending

The First Ground Level Enhancement Event of Solar Cycle 24: Direct Observation of Shock Formation and Particle Release Heights

H. Xie, I. G. Usoskin, J. M. Davila, N. Gopalswamy, S. Akiyama, S. Yashiro

arxiv:1302.1474 v1 · 2013-02-06 · 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{SDAJF2JSQ4HGG6YAPPRNUZMZ34}

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	2026-05-18T01:51:49.692603Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90c092e932870e637b007be2da6599df2ac5a58f622e79f39e37c8fb1a9d8825

Aliases

arxiv: 1302.1474 · arxiv_version: 1302.1474v1 · doi: 10.48550/arxiv.1302.1474 · pith_short_12: SDAJF2JSQ4HG · pith_short_16: SDAJF2JSQ4HGG6YA · pith_short_8: SDAJF2JS

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/SDAJF2JSQ4HGG6YAPPRNUZMZ34 \
  | 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: 90c092e932870e637b007be2da6599df2ac5a58f622e79f39e37c8fb1a9d8825

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e53570ec11f89c361ec992646ecc094ab3dcb6fa725a168478920c9a71b4b5c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/publicdomain/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2013-02-06T18:57:38Z",
    "title_canon_sha256": "4134c0a29a3e491fa0262113540474323107761a05c1b08751d8ce563ae918a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1474",
    "kind": "arxiv",
    "version": 1
  }
}