Phuket {PtProcess}

Phuket Earthquake and Aftershock Sequence

Description

The Phuket earthquake occurred on 26 December 2004 at 00:58:53.45 GMT. The Phuket data frame contains this event and its aftershock sequence.

Usage

data(Phuket)

Format

This data frame contains the following columns:

latitude

number of degrees north.

longitude

number of degrees east.

depth

depth of event in kilometres.

mb

body wave magnitude (m_b) rounded to one decimal place.

Ms

surface wave magnitude (M_s) rounded to one decimal place.

magnitude

event magnitude (\max(m_b, M_s)) rounded to one decimal place.

year

year of event (numeric vector).

month

month of event, 1 ... 12 (numeric vector).

day

day of event, 1 ... 31 (numeric vector).

hour

hour of event, 0 ... 23 (numeric vector).

minute

minute of event, 0 ... 59 (numeric vector).

second

second of event, 0 ... 59 (numeric vector).

time

number of days (and fractions) from midnight on 1 January 2004.

Details

The Phuket data frame contains those events (1248) from the PDE Catalogue, within the spatial region 89^\circE–105^\circE and 5^\circS–16^\circN, with magnitude 5 or greater, occurring between midnight on 1 January 2004 and midnight on 1 January 2009 (1827 days later). The body wave magnitudes are determined by the amplitude of the initial primary wave, and these magnitudes tend to saturate for higher values. Consequently, the tabulated magnitude is taken as the maximum of the body wave magnitude (m_b) and surface wave magnitude (M_s).

Source

The data were extracted from the PDE (Preliminary Determination of Epicentres) catalogue provided by the US Geological Survey (https://earthquake.usgs.gov/data/comcat/catalog/us/).

Examples

data(Phuket)
print(Phuket[1:10,])