{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:WQNZNQHC35JAKU75SXRUQOXN6E","short_pith_number":"pith:WQNZNQHC","canonical_record":{"source":{"id":"1801.02698","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2017-12-18T14:13:55Z","cross_cats_sorted":[],"title_canon_sha256":"1d71d69cfdd7889c550078acf5bf95aa5be4dc5325dff8c724ee9dfb5b61f905","abstract_canon_sha256":"4f0b5e5e2a25b4917127cfbbdba52b8cf6ec379cca6eab07a51b1fd98c015181"},"schema_version":"1.0"},"canonical_sha256":"b41b96c0e2df520553fd95e3483aedf1033a86fa9325e490fac735507c10fdfb","source":{"kind":"arxiv","id":"1801.02698","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02698","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02698v1","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02698","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"pith_short_12","alias_value":"WQNZNQHC35JA","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WQNZNQHC35JAKU75","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WQNZNQHC","created_at":"2026-05-18T12:31:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:WQNZNQHC35JAKU75SXRUQOXN6E","target":"record","payload":{"canonical_record":{"source":{"id":"1801.02698","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2017-12-18T14:13:55Z","cross_cats_sorted":[],"title_canon_sha256":"1d71d69cfdd7889c550078acf5bf95aa5be4dc5325dff8c724ee9dfb5b61f905","abstract_canon_sha256":"4f0b5e5e2a25b4917127cfbbdba52b8cf6ec379cca6eab07a51b1fd98c015181"},"schema_version":"1.0"},"canonical_sha256":"b41b96c0e2df520553fd95e3483aedf1033a86fa9325e490fac735507c10fdfb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:26:22.647675Z","signature_b64":"jYWZt5SJx87BN5W4Vxplg7JliF7yJcSb64E/ybzzKbDKF+26JhuumeO5QPqnmils/E7IwrZucl91+D+Ko9m+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b41b96c0e2df520553fd95e3483aedf1033a86fa9325e490fac735507c10fdfb","last_reissued_at":"2026-05-18T00:26:22.646919Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:26:22.646919Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.02698","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":"2026-05-18T00:26:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1FurKkjhIxxPctE/3+4/mLcB1gc8kDcZ3GuACh84h0P98kj7Q2d0FFoOGLckOhKWTkehjXQnzum6JTbHGuoHDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T13:52:36.036002Z"},"content_sha256":"36746aef1b0fed78f16c983f2e37c44c22270c186e1762e2d3902c4e32acbbf9","schema_version":"1.0","event_id":"sha256:36746aef1b0fed78f16c983f2e37c44c22270c186e1762e2d3902c4e32acbbf9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:WQNZNQHC35JAKU75SXRUQOXN6E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Seismology with optical links: enabling a global network for submarine earthquake monitoring","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.geo-ph","authors_text":"Alberto Mura, Andr\\'e Xuereb, Anna Tampellini, Brian Baptie, Cecilia Clivati, Davide Calonico, Filippo Levi, Giuseppe Marra, Jochen Kronj\\\"ager, Louise Wright, Luckett Richard, Stephen Robinson","submitted_at":"2017-12-18T14:13:55Z","abstract_excerpt":"Earthquake monitoring across the globe is currently achieved with networks of seismic stations. The data from these networks have been instrumental in advancing our understanding of the Earth's interior structure and dynamic behaviour. However, almost all seismic stations are located on land and earthquakes of magnitude smaller than 4 at the bottom of the oceans remain largely undetected. Here we show that ordinary telecommunication optical fibre links can detect seismic events when combined with state-of-the-art frequency metrology techniques. We have detected earthquakes over terrestrial and"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02698","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":"2026-05-18T00:26:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"97zvmjzw3iTHoG85dywaLE09ufgB1M2H+4S5S8UK7U83RTmUlRyfPy7LIZhpMPpI/uwglgHIfODiumOP6wurAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T13:52:36.036369Z"},"content_sha256":"89bbf0e2a42e5085735e16be218b105e2be5aec56f135d8c1da296aeb3adfbea","schema_version":"1.0","event_id":"sha256:89bbf0e2a42e5085735e16be218b105e2be5aec56f135d8c1da296aeb3adfbea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WQNZNQHC35JAKU75SXRUQOXN6E/bundle.json","state_url":"https://pith.science/pith/WQNZNQHC35JAKU75SXRUQOXN6E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WQNZNQHC35JAKU75SXRUQOXN6E/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":"2026-06-24T13:52:36Z","links":{"resolver":"https://pith.science/pith/WQNZNQHC35JAKU75SXRUQOXN6E","bundle":"https://pith.science/pith/WQNZNQHC35JAKU75SXRUQOXN6E/bundle.json","state":"https://pith.science/pith/WQNZNQHC35JAKU75SXRUQOXN6E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WQNZNQHC35JAKU75SXRUQOXN6E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:WQNZNQHC35JAKU75SXRUQOXN6E","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":"4f0b5e5e2a25b4917127cfbbdba52b8cf6ec379cca6eab07a51b1fd98c015181","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2017-12-18T14:13:55Z","title_canon_sha256":"1d71d69cfdd7889c550078acf5bf95aa5be4dc5325dff8c724ee9dfb5b61f905"},"schema_version":"1.0","source":{"id":"1801.02698","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02698","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02698v1","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02698","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"pith_short_12","alias_value":"WQNZNQHC35JA","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_16","alias_value":"WQNZNQHC35JAKU75","created_at":"2026-05-18T12:31:53Z"},{"alias_kind":"pith_short_8","alias_value":"WQNZNQHC","created_at":"2026-05-18T12:31:53Z"}],"graph_snapshots":[{"event_id":"sha256:89bbf0e2a42e5085735e16be218b105e2be5aec56f135d8c1da296aeb3adfbea","target":"graph","created_at":"2026-05-18T00:26:22Z","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":"Earthquake monitoring across the globe is currently achieved with networks of seismic stations. The data from these networks have been instrumental in advancing our understanding of the Earth's interior structure and dynamic behaviour. However, almost all seismic stations are located on land and earthquakes of magnitude smaller than 4 at the bottom of the oceans remain largely undetected. Here we show that ordinary telecommunication optical fibre links can detect seismic events when combined with state-of-the-art frequency metrology techniques. We have detected earthquakes over terrestrial and","authors_text":"Alberto Mura, Andr\\'e Xuereb, Anna Tampellini, Brian Baptie, Cecilia Clivati, Davide Calonico, Filippo Levi, Giuseppe Marra, Jochen Kronj\\\"ager, Louise Wright, Luckett Richard, Stephen Robinson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2017-12-18T14:13:55Z","title":"Seismology with optical links: enabling a global network for submarine earthquake monitoring"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02698","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":"sha256:36746aef1b0fed78f16c983f2e37c44c22270c186e1762e2d3902c4e32acbbf9","target":"record","created_at":"2026-05-18T00:26:22Z","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":"4f0b5e5e2a25b4917127cfbbdba52b8cf6ec379cca6eab07a51b1fd98c015181","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.geo-ph","submitted_at":"2017-12-18T14:13:55Z","title_canon_sha256":"1d71d69cfdd7889c550078acf5bf95aa5be4dc5325dff8c724ee9dfb5b61f905"},"schema_version":"1.0","source":{"id":"1801.02698","kind":"arxiv","version":1}},"canonical_sha256":"b41b96c0e2df520553fd95e3483aedf1033a86fa9325e490fac735507c10fdfb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b41b96c0e2df520553fd95e3483aedf1033a86fa9325e490fac735507c10fdfb","first_computed_at":"2026-05-18T00:26:22.646919Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:22.646919Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jYWZt5SJx87BN5W4Vxplg7JliF7yJcSb64E/ybzzKbDKF+26JhuumeO5QPqnmils/E7IwrZucl91+D+Ko9m+Bw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:22.647675Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.02698","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36746aef1b0fed78f16c983f2e37c44c22270c186e1762e2d3902c4e32acbbf9","sha256:89bbf0e2a42e5085735e16be218b105e2be5aec56f135d8c1da296aeb3adfbea"],"state_sha256":"703378050abff892c391da6db6830f0ccc22ee29e04365b3270cae121a17c4e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EmL3xqSmy3nOlRLpYy2ngyEzWCl+NPuHJ6y2p/q7ALXFfLTqJHXiUFqBjsQJN4UCpFhk6aUIugCFWApCMp6IAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T13:52:36.038369Z","bundle_sha256":"2073e1f8483ee961f25b0e20598e0e15aa873a2fd8a4b891690c7e4018296213"}}