# seismology

Rows: 3. Files: seismology.csv, seismology.json (same rows).
Unit: per row, see the unit column.

Columns:
- value: measured value
- sigma: 1-sigma uncertainty, same unit
- source: publication (authors, journal, volume, page)
- year: year of publication
- field: field of measurement
- id: row id used on the Experiments page
- unit: unit of value and sigma
- quantity: what is measured
- grade: source grade (primary, secondary, recalled) and any published bound
- bound_low: lower end of a published bound, if the result is a bound
- bound_high: upper end of that bound
- recalled: yes: number taken from a secondary source, scored but not carried

Notes from the record:
- periods read from the lecture tables and the 2015 GJI frequency (0T2 0.38 mHz), wide errors: these are rounded catalogue values, not the Masters-Widmer table

Source of the data: the publications in the source column.

Licence: Values are numerical results quoted from the cited publications; the publications themselves remain under their publishers' copyright and licences, and the numbers are reproduced here for scholarly citation, each with its source. This compilation (the selection, the columns and the notes): licence to be set by the author; CC BY 4.0 proposed.

sha256 of seismology.csv: a9ded402d49d588711bf88cc941ce2ad82e4835661af9e7a326c8974854f0bb9
Record file last written: 2026-11-07 19:45:40 IST.