etasFLP (version 2.2.2)

magn.plot: 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", ...)

Value

A new plot is printed (see details).

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()

Author

Marcello Chiodi.

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.

Examples

if (FALSE) {
data(italycatalog)
magn.plot(italycatalog) 
}