| 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,])