PtProcess (version 3.3-17)

Tangshan: 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.

Examples

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