{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"35439f34cd25a28b72a3c7723b9a7e5495bb19cac7cf0a28b12628a726d7a14d","created":"2026-10-03T07:18:03Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"896be731bc4fb3b2bf6a6991286f25afa1f2517519c0c3bd2a2f40058603494e","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"earth.planetary-dynamos.ice-giant-fields","kind":"phenomenon","literature_status":"open","n":"1","parents":[],"plain":"The magnetic fields of Uranus and Neptune are tipped far from the spin axis and lumpy, unlike those of other planets. This suggests the dynamo (the field generator) runs in a thin layer, but the interior is poorly known.","posed_since":"","precise":"Voyager 2 measured dipole tilts near 59 and 47 degrees with strong quadrupole and octupole components. Determine whether a thin-shell dynamo in an ionic water-dominated layer above a stably stratified interior reproduces these fields, and what interior structure is required. An answer is a dynamo model consistent with measured field harmonics and with gravity and heat-flow constraints.","problem_ref":null,"references":"","settled_by":"An orbiter mission measuring field harmonics, gravity and heat flow combined with dynamo models.","status_note":"","title":"Why are Uranus's and Neptune's fields strongly tilted and multipolar?","topic_ref":"d630b91b3d151b4fd563599f0c63c42ed19209d89bcb67e4ebbd2cdaddd50144"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"2d824a2b1647f3e67180206590cf22e42b30ea205542f5ea158501a2e6642ffd","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"116a81828d2b3ba56ee1b3b782b03efc444c56c3b4dc2305bdda3daa755a65a2","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"jYTkt-LuTv0GLug28iEctr0_hGrf_kUoAZNJB9KgqiXWqQpiCqsc03wP2sF-IpDri1FijoEK25xQ8Pbt7cSDAg"},"schema":"pubphys.envelope/1"},"record_hash":"2d824a2b1647f3e67180206590cf22e42b30ea205542f5ea158501a2e6642ffd","leaf_index":1354}