{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:XMEZXOQQUDBTDIDUXEL5FGC2WC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"57a854bd56f680001ad78fd246a9b2653ff0e5c6d5ce5ea251f8e1a877ac3647","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2018-12-13T13:42:45Z","title_canon_sha256":"fe22d4c96d133da7710e9d088b53f49daf20d776eae641317c6549ce93beef18"},"schema_version":"1.0","source":{"id":"1812.05423","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.05423","created_at":"2026-05-17T23:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1812.05423v1","created_at":"2026-05-17T23:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.05423","created_at":"2026-05-17T23:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"XMEZXOQQUDBT","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"XMEZXOQQUDBTDIDU","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"XMEZXOQQ","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:1f38e018a6b13dec84961bac2eb8c030facd1cb7adba6fbe11c73bb4b16901a2","target":"graph","created_at":"2026-05-17T23:58:20Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Long periods of strong southward magnetic fields are known to be the primary cause of intense geomagnetic storms. The majority of such events are caused by the passage over Earth of a magnetic ejecta. Irrespective of the interplanetary cause, fast-forward shocks often precede such strong southward B$_{z}$ periods. Here, we first look at all long periods of strong southward magnetic fields as well as fast-forward shocks measured by the \\textit{Wind} spacecraft in a 22.4-year span. We find that 76{\\%} of strong southward B$_{z}$ periods are preceded within 48 hours by at least a fast-forward sho","authors_text":"A. B. Galvin, C. J. Farrugia, N. A. Schwadron, N. Lugaz, R. M. Winslow, T. M. Salman","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2018-12-13T13:42:45Z","title":"Forecasting Periods of Strong Southward Magnetic Field Following Interplanetary Shocks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.05423","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7e855918bb97d4fbcbd6a0a39ecbc98634e4302c10819797b751b5f747d3316d","target":"record","created_at":"2026-05-17T23:58:20Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"57a854bd56f680001ad78fd246a9b2653ff0e5c6d5ce5ea251f8e1a877ac3647","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.space-ph","submitted_at":"2018-12-13T13:42:45Z","title_canon_sha256":"fe22d4c96d133da7710e9d088b53f49daf20d776eae641317c6549ce93beef18"},"schema_version":"1.0","source":{"id":"1812.05423","kind":"arxiv","version":1}},"canonical_sha256":"bb099bba10a0c331a074b917d2985ab081b3b9bd06081194e895162c119dcc60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb099bba10a0c331a074b917d2985ab081b3b9bd06081194e895162c119dcc60","first_computed_at":"2026-05-17T23:58:20.264957Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:20.264957Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2k2SBscON1fnKXsORy/G6cUkWaZ0UbdEC/13oxGGZKA7QM1uJgfm98kj8XbNKypZGdifSqvMBdQidzi3djg6DA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:20.265538Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.05423","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7e855918bb97d4fbcbd6a0a39ecbc98634e4302c10819797b751b5f747d3316d","sha256:1f38e018a6b13dec84961bac2eb8c030facd1cb7adba6fbe11c73bb4b16901a2"],"state_sha256":"1eb10c1747b511a1ec12589a60ec179ff85413c11e60e023d214100f8c193d8a"}