rockhound.fetch_prem¶
-
rockhound.
fetch_prem
(*, load=True)[source]¶ Fetch the Preliminary Reference Earth Model (PREM).
The Preliminary reference Earth model [Dziewonsky1981] is a one-dimensional model representing the average Earth properties as a function of planetary radius. The model includes the depth, density, seismic velocities, attenuation (Q) and anisotropic parameter (\(\eta\)) on the boundaries of several Earth layers. It’s available through IRIS Data Services Products [IRIS2011] in a csv file (comma-separated values). The data is loaded into
pandas.DataFrame
objects.If the file isn’t already in your data directory, it will be downloaded automatically.
Parameters: - load : bool
Wether to load the data into a
pandas.DataFrame
or just return the path to the downloaded data.
Returns: - prem :
pandas.DataFrame
or str The loaded data or the file path to the downloaded data. The
pandas.DataFrame
contains the following data:radius
anddepth
in km.density
in g/cm³.Vpv
,Vph
,Vsv
andVsh
in km/s.eta
,Q_mu
andQ_kappa
(dimensionless).