fmd: The Earthquake FMD

In amignan/rseismNet: Earthquake Frequency-Magnitude Distribution & Network Statistics

Description

Compute the earthquake frequency magnitude distribution (FMD) for a vector of earthquake magnitudes m with binning mbin.

Usage

fmd(m, mbin = 0.1)

Arguments

m	a numeric vector of earthquake magnitudes
mbin	the magnitude binning value (if not provided, mbin = 0.1)

Details

Magnitude intervals have the form (m_i - m_bin/2, m_i + m_bin/2], as defined in function graphics::hist (for its default right = TRUE).

Value

The earthquake FMD data frame of 3 parameters:

mi	the magnitude bins
ni	the non-cumulative number of earthquakes of magnitude mi
Ni	the cumulative number of earthquakes of magnitude ≥ mi

Examples

mbin <- 0.1
beta <- log(10); mc <- 2
m <- mc - mbin / 2 + rexp(1e3, beta)
mdistr <- fmd(m)
View(mdistr)

amignan/rseismNet documentation built on July 8, 2019, 6:53 p.m.