magn.plot {etasFLP}

Transformed plot of the magnitudes distribution of an earthquakes catalog

Description

Plots the logarithm of the cumulative frequency of eccedence vs. magnitude in an earthquake catalog.

Usage

magn.plot(catalog, main = "Transformed plot of magnitude frequencies", ...)

Arguments

catalog

should be a eqcat object, or at least must contain a column with name magn1.

main

Title to give to the plot

...

other arguments to be passed to plot()

Details

For each magnitude m_j, if N_j is the number of values of magn1 greater than m_j, the values of \log(N_j) vs. m_j are plotted.

According to the Gutenberg-Richter law, this plot should be linear. If there is a linear behaviour only for values greater than a given m_0, then m_0 is probably the magnitude threshold of the catalog.

Value

A new plot is printed (see details).

Author(s)

Marcello Chiodi.

Examples

## Not run: 
data(italycatalog)
magn.plot(italycatalog) 

## End(Not run)