Episode 52 - "You pay for significant digits"
Last week we talked about glaciers, a basic staple of any geology education. That means it’s only fair to talk about a geophysics staple this week. We can measure gravity at different locations and use it to help figure out what’s under...
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Show Notes
Last week we talked about glaciers, a basic staple of any geology education. That means it’s only fair to talk about a geophysics staple this week. We can measure gravity at different locations and use it to help figure out what’s under our feet. That and another great Fun Paper this week!
Gravity Basics
- All geophysical methods are based on measuring some kind of physical property difference.
- Gravity is sensitive to the density of the material below the measurement.
- “Big G"
- gal (unit)
- Density for any rock varies widely.
- Gravity from impact structures
Measuring gravity
Corrections
- Examples of the more common corrections
- Eötvös effect
- John’s explanation of Coriolis Force and Toilets
- Isostasy
- Bouguer Anomaly
- FORTRAN Talwani Example
- Original Talwani Paper
Fun Paper Friday
- Alarcón, Héctor, et al. “Self-Amplification of Solid Friction in Interleaved Assemblies.” Physical Review Letters 116.1 (2016): 015502.
- Semis pulling on phone books
- Mythbusters
Contact us:
Show - www.dontpanicgeocast.com - @dontpanicgeo - [email protected]
John Leeman - www.johnrleeman.com - @geo_leeman
Shannon Dulin - @ShannonDulin