{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:UMJ3ASHIFM4LPQ4V4HY4HJ4NHF","short_pith_number":"pith:UMJ3ASHI","canonical_record":{"source":{"id":"1312.0704","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-12-03T05:53:33Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"82b04faffc4dfcf2582366e2ff1ae18ce02014cd0aad90c8396c8e05b472dcf1","abstract_canon_sha256":"beee2a2d10227a38749fec2bf1b2d87dffde5a396fd5db1b25cafe7d45ae8405"},"schema_version":"1.0"},"canonical_sha256":"a313b048e82b38b7c395e1f1c3a78d39486b379607f5c8b2e7ae451872c483de","source":{"kind":"arxiv","id":"1312.0704","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.0704","created_at":"2026-05-18T03:05:36Z"},{"alias_kind":"arxiv_version","alias_value":"1312.0704v1","created_at":"2026-05-18T03:05:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.0704","created_at":"2026-05-18T03:05:36Z"},{"alias_kind":"pith_short_12","alias_value":"UMJ3ASHIFM4L","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"UMJ3ASHIFM4LPQ4V","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"UMJ3ASHI","created_at":"2026-05-18T12:28:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:UMJ3ASHIFM4LPQ4V4HY4HJ4NHF","target":"record","payload":{"canonical_record":{"source":{"id":"1312.0704","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-12-03T05:53:33Z","cross_cats_sorted":["physics.ao-ph"],"title_canon_sha256":"82b04faffc4dfcf2582366e2ff1ae18ce02014cd0aad90c8396c8e05b472dcf1","abstract_canon_sha256":"beee2a2d10227a38749fec2bf1b2d87dffde5a396fd5db1b25cafe7d45ae8405"},"schema_version":"1.0"},"canonical_sha256":"a313b048e82b38b7c395e1f1c3a78d39486b379607f5c8b2e7ae451872c483de","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:05:36.920625Z","signature_b64":"jlTOyDGsU156AjXpB/20SaG4cAcz3V9jCj1Q3DCvqDb8joY3ad6GKcUVC1LXrCR+L4b+tDSpf4KX7UFETx9CDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a313b048e82b38b7c395e1f1c3a78d39486b379607f5c8b2e7ae451872c483de","last_reissued_at":"2026-05-18T03:05:36.919859Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:05:36.919859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1312.0704","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:05:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c0CC4xSx5Ko8fYqTrRJAD4RhAVvgEfqC1q+PwqXS8z8s3r5RmHmCCPbQRq+q+ahG8kt8Zayx6zax26Usk4yJAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T02:50:30.982817Z"},"content_sha256":"1aa62a1298b4c45f1c31880d2fca1fd7831938b847bc2533a9bee751932c4fe0","schema_version":"1.0","event_id":"sha256:1aa62a1298b4c45f1c31880d2fca1fd7831938b847bc2533a9bee751932c4fe0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:UMJ3ASHIFM4LPQ4V4HY4HJ4NHF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the semi-annual, 27 day, variation in geomagnetic activity, cloud cover and surface temperature","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ao-ph"],"primary_cat":"astro-ph.EP","authors_text":"Ian Edmonds","submitted_at":"2013-12-03T05:53:33Z","abstract_excerpt":"We develop a basic model of the time variation of geomagnetic activity and show that the model predicts, with decreasing levels of exactitude, the time variation of the ~27 day period components of geomagnetic aa index, cloud cover and surface temperature during several years near solar cycle minima. We interpret this as indicating that there is a connection between the ~27 day variation of geomagnetic activity and the ~27 day variations of cloud cover and surface temperature with the decreasing correlations between model variation and aa index, cloud cover and surface temperature variation du"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.0704","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:05:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YvRrT3BinoRfTJ7HP8/i7HDqVQQ2gC3NfB3oHkTrXKGS1DnVXRIkuC93nYY0Y3wrAh1yRHXpKMqVSqt6tsaEBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T02:50:30.983154Z"},"content_sha256":"11fb539e9bb0d4e4377b77228f3dc1fbba2840a04abd7c3d9f6d645b6b81487f","schema_version":"1.0","event_id":"sha256:11fb539e9bb0d4e4377b77228f3dc1fbba2840a04abd7c3d9f6d645b6b81487f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF/bundle.json","state_url":"https://pith.science/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-04T02:50:30Z","links":{"resolver":"https://pith.science/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF","bundle":"https://pith.science/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF/bundle.json","state":"https://pith.science/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UMJ3ASHIFM4LPQ4V4HY4HJ4NHF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:UMJ3ASHIFM4LPQ4V4HY4HJ4NHF","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":"beee2a2d10227a38749fec2bf1b2d87dffde5a396fd5db1b25cafe7d45ae8405","cross_cats_sorted":["physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-12-03T05:53:33Z","title_canon_sha256":"82b04faffc4dfcf2582366e2ff1ae18ce02014cd0aad90c8396c8e05b472dcf1"},"schema_version":"1.0","source":{"id":"1312.0704","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.0704","created_at":"2026-05-18T03:05:36Z"},{"alias_kind":"arxiv_version","alias_value":"1312.0704v1","created_at":"2026-05-18T03:05:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.0704","created_at":"2026-05-18T03:05:36Z"},{"alias_kind":"pith_short_12","alias_value":"UMJ3ASHIFM4L","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"UMJ3ASHIFM4LPQ4V","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"UMJ3ASHI","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:11fb539e9bb0d4e4377b77228f3dc1fbba2840a04abd7c3d9f6d645b6b81487f","target":"graph","created_at":"2026-05-18T03:05:36Z","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 develop a basic model of the time variation of geomagnetic activity and show that the model predicts, with decreasing levels of exactitude, the time variation of the ~27 day period components of geomagnetic aa index, cloud cover and surface temperature during several years near solar cycle minima. We interpret this as indicating that there is a connection between the ~27 day variation of geomagnetic activity and the ~27 day variations of cloud cover and surface temperature with the decreasing correlations between model variation and aa index, cloud cover and surface temperature variation du","authors_text":"Ian Edmonds","cross_cats":["physics.ao-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-12-03T05:53:33Z","title":"On the semi-annual, 27 day, variation in geomagnetic activity, cloud cover and surface temperature"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.0704","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":"sha256:1aa62a1298b4c45f1c31880d2fca1fd7831938b847bc2533a9bee751932c4fe0","target":"record","created_at":"2026-05-18T03:05:36Z","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":"beee2a2d10227a38749fec2bf1b2d87dffde5a396fd5db1b25cafe7d45ae8405","cross_cats_sorted":["physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-12-03T05:53:33Z","title_canon_sha256":"82b04faffc4dfcf2582366e2ff1ae18ce02014cd0aad90c8396c8e05b472dcf1"},"schema_version":"1.0","source":{"id":"1312.0704","kind":"arxiv","version":1}},"canonical_sha256":"a313b048e82b38b7c395e1f1c3a78d39486b379607f5c8b2e7ae451872c483de","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a313b048e82b38b7c395e1f1c3a78d39486b379607f5c8b2e7ae451872c483de","first_computed_at":"2026-05-18T03:05:36.919859Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:05:36.919859Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jlTOyDGsU156AjXpB/20SaG4cAcz3V9jCj1Q3DCvqDb8joY3ad6GKcUVC1LXrCR+L4b+tDSpf4KX7UFETx9CDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:05:36.920625Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.0704","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1aa62a1298b4c45f1c31880d2fca1fd7831938b847bc2533a9bee751932c4fe0","sha256:11fb539e9bb0d4e4377b77228f3dc1fbba2840a04abd7c3d9f6d645b6b81487f"],"state_sha256":"69e1b5d5033e156ed0ab5b9cc2788a78501556e84f0fc5df2ae72abd2431bf5d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tx43pWXg+KQ3XTAjI7+qsASn1pYAZNkM0KJd8T/UMaEDbwJJgdx98Y0RGDpGelIZ7xRyL4+LSHbvAZQX+UEaDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T02:50:30.985246Z","bundle_sha256":"972341568cf996488f989543bd7c791b6c5ee30b375a1ec75aa729e7c79aef45"}}