{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:3G7EFXRB2LJR2ILL3NYAI2U6YQ","short_pith_number":"pith:3G7EFXRB","canonical_record":{"source":{"id":"1604.06406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2016-04-21T18:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"1ec6ed5822a97d59d82837aa17c3fe8b12a4c97ebd61be61486c7d7210a97097","abstract_canon_sha256":"6acd1c5687456bd6c17eec9b491df8234525d0fafbd6787bb18aa176f128958f"},"schema_version":"1.0"},"canonical_sha256":"d9be42de21d2d31d216bdb70046a9ec4072fc7e36684eb5a87cbf3f38602a73a","source":{"kind":"arxiv","id":"1604.06406","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.06406","created_at":"2026-05-18T00:55:58Z"},{"alias_kind":"arxiv_version","alias_value":"1604.06406v2","created_at":"2026-05-18T00:55:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.06406","created_at":"2026-05-18T00:55:58Z"},{"alias_kind":"pith_short_12","alias_value":"3G7EFXRB2LJR","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3G7EFXRB2LJR2ILL","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3G7EFXRB","created_at":"2026-05-18T12:29:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:3G7EFXRB2LJR2ILL3NYAI2U6YQ","target":"record","payload":{"canonical_record":{"source":{"id":"1604.06406","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2016-04-21T18:15:19Z","cross_cats_sorted":[],"title_canon_sha256":"1ec6ed5822a97d59d82837aa17c3fe8b12a4c97ebd61be61486c7d7210a97097","abstract_canon_sha256":"6acd1c5687456bd6c17eec9b491df8234525d0fafbd6787bb18aa176f128958f"},"schema_version":"1.0"},"canonical_sha256":"d9be42de21d2d31d216bdb70046a9ec4072fc7e36684eb5a87cbf3f38602a73a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:55:58.043660Z","signature_b64":"l4wTwdk8aiGV2HMLsCpa1N2Sn+yvD1zvFnEBJaPtk8p1CULxJ030r9a/+iQJSbx2s2urxphR6KBKJWKul4xXDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d9be42de21d2d31d216bdb70046a9ec4072fc7e36684eb5a87cbf3f38602a73a","last_reissued_at":"2026-05-18T00:55:58.043260Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:55:58.043260Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.06406","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:55:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cZsH8Mohv4nPz+wp5dnaa162Sa6jneBXYV0ZJXUI20m8/T8dI+bwIQz6seE/iHPk22KLF+KfBoSPWeAHrOPwAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T11:01:01.578699Z"},"content_sha256":"89781a77aaf608185f2989cdc790363a77a79d3ffcec07127f34602d85d489f6","schema_version":"1.0","event_id":"sha256:89781a77aaf608185f2989cdc790363a77a79d3ffcec07127f34602d85d489f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:3G7EFXRB2LJR2ILL3NYAI2U6YQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A computer code for forward calculation and inversion of the H/V spectral ratio under the diffuse field assumption","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.geo-ph","authors_text":"Antonio Garc\\'ia-Jerez, Francisco J. S\\'anchez-Sesma, Francisco Luz\\'on, Jos\\'e Pi\\~na-Flores, Mathieu Perton","submitted_at":"2016-04-21T18:15:19Z","abstract_excerpt":"During a quarter of a century, the main characteristics of the horizontal-to-vertical spectral ratio of ambient noise HVSRN have been extensively used for site effect assessment. In spite of the uncertainties about the optimum theoretical model to describe these observations, several schemes for inversion of the full HVSRN curve for near surface surveying have been developed over the last decade.\n  In this work, a computer code for forward calculation of H/V spectra based on the diffuse field assumption (DFA) is presented and tested.It takes advantage of the recently stated connection between "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.06406","kind":"arxiv","version":2},"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":"2026-05-18T00:55:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Jiuns3MHnZxq8gndoKh4L9HFRxQSPD9ff02QXV1cabycSwPnuqH4boxKiqB7sCQ5+gSNtNc6cF5L5P3MLmTjAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T11:01:01.579182Z"},"content_sha256":"697d4d9c43deb479c6fc61150fa87f64eba731bf2dd1bea41d7fb5a1af9b9a83","schema_version":"1.0","event_id":"sha256:697d4d9c43deb479c6fc61150fa87f64eba731bf2dd1bea41d7fb5a1af9b9a83"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ/bundle.json","state_url":"https://pith.science/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ/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":"2026-06-29T11:01:01Z","links":{"resolver":"https://pith.science/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ","bundle":"https://pith.science/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ/bundle.json","state":"https://pith.science/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3G7EFXRB2LJR2ILL3NYAI2U6YQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:3G7EFXRB2LJR2ILL3NYAI2U6YQ","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":"6acd1c5687456bd6c17eec9b491df8234525d0fafbd6787bb18aa176f128958f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2016-04-21T18:15:19Z","title_canon_sha256":"1ec6ed5822a97d59d82837aa17c3fe8b12a4c97ebd61be61486c7d7210a97097"},"schema_version":"1.0","source":{"id":"1604.06406","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.06406","created_at":"2026-05-18T00:55:58Z"},{"alias_kind":"arxiv_version","alias_value":"1604.06406v2","created_at":"2026-05-18T00:55:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.06406","created_at":"2026-05-18T00:55:58Z"},{"alias_kind":"pith_short_12","alias_value":"3G7EFXRB2LJR","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_16","alias_value":"3G7EFXRB2LJR2ILL","created_at":"2026-05-18T12:29:55Z"},{"alias_kind":"pith_short_8","alias_value":"3G7EFXRB","created_at":"2026-05-18T12:29:55Z"}],"graph_snapshots":[{"event_id":"sha256:697d4d9c43deb479c6fc61150fa87f64eba731bf2dd1bea41d7fb5a1af9b9a83","target":"graph","created_at":"2026-05-18T00:55:58Z","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":"During a quarter of a century, the main characteristics of the horizontal-to-vertical spectral ratio of ambient noise HVSRN have been extensively used for site effect assessment. In spite of the uncertainties about the optimum theoretical model to describe these observations, several schemes for inversion of the full HVSRN curve for near surface surveying have been developed over the last decade.\n  In this work, a computer code for forward calculation of H/V spectra based on the diffuse field assumption (DFA) is presented and tested.It takes advantage of the recently stated connection between ","authors_text":"Antonio Garc\\'ia-Jerez, Francisco J. S\\'anchez-Sesma, Francisco Luz\\'on, Jos\\'e Pi\\~na-Flores, Mathieu Perton","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2016-04-21T18:15:19Z","title":"A computer code for forward calculation and inversion of the H/V spectral ratio under the diffuse field assumption"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.06406","kind":"arxiv","version":2},"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":"sha256:89781a77aaf608185f2989cdc790363a77a79d3ffcec07127f34602d85d489f6","target":"record","created_at":"2026-05-18T00:55:58Z","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":"6acd1c5687456bd6c17eec9b491df8234525d0fafbd6787bb18aa176f128958f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2016-04-21T18:15:19Z","title_canon_sha256":"1ec6ed5822a97d59d82837aa17c3fe8b12a4c97ebd61be61486c7d7210a97097"},"schema_version":"1.0","source":{"id":"1604.06406","kind":"arxiv","version":2}},"canonical_sha256":"d9be42de21d2d31d216bdb70046a9ec4072fc7e36684eb5a87cbf3f38602a73a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d9be42de21d2d31d216bdb70046a9ec4072fc7e36684eb5a87cbf3f38602a73a","first_computed_at":"2026-05-18T00:55:58.043260Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:55:58.043260Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"l4wTwdk8aiGV2HMLsCpa1N2Sn+yvD1zvFnEBJaPtk8p1CULxJ030r9a/+iQJSbx2s2urxphR6KBKJWKul4xXDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:55:58.043660Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.06406","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89781a77aaf608185f2989cdc790363a77a79d3ffcec07127f34602d85d489f6","sha256:697d4d9c43deb479c6fc61150fa87f64eba731bf2dd1bea41d7fb5a1af9b9a83"],"state_sha256":"7233d53cba5f64ff961f2d774b8aa0f257c1e87f835c0925d35f1cd4675ca568"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xNOheSmcCva/3zinJ/thimC27aYrl4u+yfVGJxDB2qWXMvquPTfc+7R0L3ayEhyAW8DDkVgjnvI8qvWql+gxBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T11:01:01.580949Z","bundle_sha256":"bd86885907d0280caabf941ce248d9754831fcdf4d038b5ebccdbf60abd05b85"}}