{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"ae79c7b899c9e3f7c99e348c8cec7b5b6c749bc0226e7439d8246b999efce4fa","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["78ce7db2fd15a070f04d9489e18f9b9a3d4bd1e0784657b1ba80313dcf64a6d1","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"b5862af94b41ec60e1473dd1e1a49ff5fdbf083b609a088c5c6ce338912fd3a9","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"mechanism","assisted_by":[],"external_id":"earth.earthquake-physics.slow-slip-control","kind":"phenomenon","literature_status":"open","n":"2","parents":[],"plain":"Some faults release stress in slow slip events lasting days to months, with faint tremor instead of shaking. What property of a fault makes its slip slow instead of fast is not established.","posed_since":"","precise":"Slow slip events and tectonic tremor at subduction zones move at slip rates of order $10^{-6} \\text{ to } 10^{-5}\\,\\mathrm{cm/s}$, roughly $10 \\text{ to } 100$ times the plate rate and about $10^{7} \\text{ to } 10^{8}$ times slower than earthquake slip (near $10^{2}\\,\\mathrm{cm/s}$). Identify the physical control: near-neutral rate-and-state frictional stability ($a - b \\text{ near } 0$) with high pore-fluid pressure, dilatancy strengthening, mixed frictional-viscous rheology, or fault-zone heterogeneity, and whether and when slow slip triggers large earthquakes. An answer is a constitutive model, tested against laboratory data, that reproduces the observed moment-duration scaling, recurrence and tremor of slow slip (review: Burgmann, EPSL 2018, https://doi.org/10.1016/j.epsl.2018.04.062).","problem_ref":"78ce7db2fd15a070f04d9489e18f9b9a3d4bd1e0784657b1ba80313dcf64a6d1","references":"","settled_by":"Laboratory friction experiments on natural fault-zone materials under in situ fluid pressure that reproduce slow slip, matched to geodetic and tremor catalogs.","status_note":"","title":"What decides whether a fault slips slowly or in earthquakes?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"0f8d5a3b4ec5082035593acbb8451747dedf203c932f86e363f2cc6374f3589b","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"97afd5fdf02a0473ed195ec098105bc5fb24813715e5449e1d7ecbc2f6bccc56","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"98KztybRSsZ-bbQG2X-8uFNR1tEomr0Xjr8fdsy50hEwCZKFiNjsiCggEBjdJ5ePUkQWYIOCoqBfdAjKpuUbAg"},"schema":"pubphys.envelope/1"},"record_hash":"0f8d5a3b4ec5082035593acbb8451747dedf203c932f86e363f2cc6374f3589b","leaf_index":3192}