Pith Number

pith:BYZVZDCI

pith:2026:BYZVZDCIBKBUIVHVSMYKNU7AZW

not attested not anchored not stored refs pending

Joint Bayesian inference of Earth's magnetic field and core surface flow on millennial timescales

Anders Irb\"ack, Andreas Nilsson, Julien Aubert, Marie Troyano, Neil Suttie, Nicolas Gillet

Bayesian framework reconstructs geomagnetic field and core flows from paleomagnetic data

arxiv:2601.10344 v4 · 2026-01-15 · physics.geo-ph

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BYZVZDCIBKBUIVHVSMYKNU7AZW}

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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.

Claims

C1strongest claim

Tests using synthetic data generated from an Earth-like geodynamo demonstrate that the method reliably recovers large-scale geomagnetic field variations and key aspects of core dynamics, including long-term westward drift and the evolution of planetary-scale eccentric gyres.

C2weakest assumption

The reduced stochastic representation of core surface dynamics derived from numerical geodynamo statistics accurately captures the relevant dynamical correlations on millennial timescales.

C3one line summary

A new Bayesian method jointly infers geomagnetic field and core flow evolution over 9000 years from archaeo/palaeomagnetic data using geodynamo-derived stochastic priors and efficient age marginalization.

Receipt and verification

First computed	2026-05-20T14:03:24.220071Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e335c8c480a834454f59330a6d3e0cda44947fde8f10fa62f4aaeead6217eec

Aliases

arxiv: 2601.10344 · arxiv_version: 2601.10344v4 · doi: 10.48550/arxiv.2601.10344 · pith_short_12: BYZVZDCIBKBU · pith_short_16: BYZVZDCIBKBUIVHV · pith_short_8: BYZVZDCI

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/BYZVZDCIBKBUIVHVSMYKNU7AZW \
  | 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: 0e335c8c480a834454f59330a6d3e0cda44947fde8f10fa62f4aaeead6217eec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "165041b98c04d575577dbcf5db75aa73af67e8f49a145c202868fde6370df6ee",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "physics.geo-ph",
    "submitted_at": "2026-01-15T12:41:04Z",
    "title_canon_sha256": "458a50a7504ff37e8e9d7c7184123c4de6f1dd7c7e813bb7d97f9bbef0660c1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.10344",
    "kind": "arxiv",
    "version": 4
  }
}