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Results tagged with measurements
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user 28050
Questions related to acquiring, processing and interpreting field measurements of any kind. Including instrumentation and data analysis.
11
votes
How are subsurface wave speeds determined without subsurface sensors?
Tomography! In essence, we guess some velocities, compute the arrival times our guess implies, compare them with actual arrival times, tweak our answer, and repeat. Seismic tomography is an ill-posed, …
- 11k
8
votes
Characterizing earthquakes using accelerometer data
consumer-grade MEMS accelerometers (as you might find in a phone or latop) may not have the sensitivity or calibration that a researcher would want, but one might compensate somewhat for this with multiple measurements … Dashti et al. (2013) in Earthquake Spectra Journal found you could get useful measurements (e.g. for emergency response) from networks of phones with a few tricks:
The more measurements the better. …
- 11k
14
votes
Accepted
Width of strata in stratigraphic column
The width of a unit in a stratigraphic column, or 'log', sometimes represents the average grainsize of the rock. I can imagine it being keyed to some other property, but grainsize is common. You'll f …
- 11k