{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:OOWTDGXXFITIAQWTUT4GBOFFOE","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":"8c3690c6b5814ab51d9a3d70fc5f0b056567f295bc52dd30060dd72d47474244","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-07T19:57:01Z","title_canon_sha256":"1d5133d2bf1d6b518329f24ed3e560fa1afe2e6dd725d4b5b21d331e251aae01"},"schema_version":"1.0","source":{"id":"0706.0961","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0706.0961","created_at":"2026-05-18T02:16:30Z"},{"alias_kind":"arxiv_version","alias_value":"0706.0961v1","created_at":"2026-05-18T02:16:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0706.0961","created_at":"2026-05-18T02:16:30Z"},{"alias_kind":"pith_short_12","alias_value":"OOWTDGXXFITI","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_16","alias_value":"OOWTDGXXFITIAQWT","created_at":"2026-05-18T12:25:55Z"},{"alias_kind":"pith_short_8","alias_value":"OOWTDGXX","created_at":"2026-05-18T12:25:55Z"}],"graph_snapshots":[{"event_id":"sha256:71235e09e048e0ddec228e560f2ee011ed274995d577454ea6d119b4699a8134","target":"graph","created_at":"2026-05-18T02:16:30Z","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":"We describe the derivation of the InterHourly Variability (IHV) index of geomagnetic activity. The IHV-index for a geomagnetic element is mechanically derived from hourly values as the sum of the unsigned differences between adjacent hours over a seven-hour interval centered on local midnight. The index is derived separately for stations in both hemispheres within six longitude sectors using only local night hours. It is intended as a long-term index. Available data allows derivation of the index back well into the 19th century. On a time scale of a 27-day Bartels rotation, IHV averages for st","authors_text":"Edward W. Cliver, Leif Svalgaard","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-06-07T19:57:01Z","title":"The InterHourly-Variability (IHV) Index of Geomagnetic Activity and its Use in Deriving the Long-term Variation of Solar Wind Speed"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0706.0961","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":"sha256:25a3f745f10ad6015bbc522043a4237be8c1d57382bca77bc565a91e639ec82a","target":"record","created_at":"2026-05-18T02:16:30Z","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":"8c3690c6b5814ab51d9a3d70fc5f0b056567f295bc52dd30060dd72d47474244","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-06-07T19:57:01Z","title_canon_sha256":"1d5133d2bf1d6b518329f24ed3e560fa1afe2e6dd725d4b5b21d331e251aae01"},"schema_version":"1.0","source":{"id":"0706.0961","kind":"arxiv","version":1}},"canonical_sha256":"73ad319af72a268042d3a4f860b8a57125db63e834783032c9174c6a8d89af3f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73ad319af72a268042d3a4f860b8a57125db63e834783032c9174c6a8d89af3f","first_computed_at":"2026-05-18T02:16:30.334429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:30.334429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BA6pFsmZu/cxzY0KUo0QBCznnUPdapSbm2MyTxUaCF+Uo386bV2TmLqeL251yN60aQy5omncAEiQ6WWTWoo/Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:30.335066Z","signed_message":"canonical_sha256_bytes"},"source_id":"0706.0961","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:25a3f745f10ad6015bbc522043a4237be8c1d57382bca77bc565a91e639ec82a","sha256:71235e09e048e0ddec228e560f2ee011ed274995d577454ea6d119b4699a8134"],"state_sha256":"e648e093eb370f20628eb52bdefeb2cd4ded469cd554539f60c4cb4e07d72901"}