italy.quakes: An Italian Earthquake Catalog

In ETAS: Modeling Earthquake Data Using 'ETAS' Model

An Italian Earthquake Catalog

Description

A data frame with 2158 rows and 6 columns giving occurrence date, time, longitude, latitude, magnitude and depth of earthquakes occurred since 2005-04-16 till 2013-11-01 in Italy and its vicinity (6.15-19E and 35-48N) with magnitude greater than or equal to 3.

Usage

data(italy.quakes)

Format

An object of class "data.frame" containing the following columns:

• date Occurrence date in the format "yyyy/mm/dd"

• time Occurrence time in decimal days after the first earthquake

• long Latitude of epicenter in decimal degrees

• lat Latitude of epicenter in decimal degrees

• mag Magnitude of each earthquake by JMA (Japan Meteorological Agency)

• depth Depth of each earthquake

Source

Data are retrieved from the Italian Seismological Instrumental and Parametric Data Base (ISIDE) by Marcello Chiodi and Giada Adelfio in the etasFLP package.

References

Marcello Chiodi and Giada Adelfio (2015). etasFLP: Mixed FLP and ML Estimation of ETAS Space-Time Point Processes. R package version 1.3.0. https://CRAN.R-project.org/package=etasFLP.

Examples

  # creat an earthquake catalog
  italy.cat <- catalog(italy.quakes, dist.unit="km")

  ## Not run: 
  plot(italy.cat)
## End(Not run)

  # set initial parameter values
  mu <- 1
  k0 <- 0.005
  c <- 0.005
  alpha <- 1.05
  p <- 1.01
  D <- 1.1
  q <- 1.52
  gamma <- 0.6
  # reparametrization: transform k0 to A
  A <- pi * k0 / ((p - 1) * c^(p - 1) * (q - 1) * D^(q - 1))
  param0 <- c(mu, A, c, alpha, p, D, q, gamma)

  ## Not run: 
  italy.fit <- etas(italy.cat, param0)
## End(Not run)

ETAS documentation built on Nov. 5, 2025, 6:23 p.m.