Tangshan {PtProcess}R Documentation

Tangshan Earthquake and Aftershock Sequence

Description

The Tangshan earthquake occurred on 28 July 1976 at 03:42:53, with a magnitude of 7.9. The Tangshan data frame contains those events (455) from the Beijing Catalogue, within 100 km of the epicentre and with magnitude 4 or greater, from the beginning of 1974 to the end of 1984.

Usage

data(Tangshan)

Format

This data frame contains the following columns:

latitude

number of degrees north.

longitude

number of degrees east.

magnitude

number of magnitude units above 4.

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 the beginning of 1974.

Source

These data originate from the Beijing Catalogue which is administered by the China Seismological Bureau, Beijing.

Examples

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

[Package PtProcess version 3.3-16 Index]