Description Usage Format Source Examples
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.
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This data frame contains the following columns:
number of degrees north.
number of degrees east.
number of magnitude units above 4.
year of event (numeric vector).
month of event, 1 ... 12 (numeric vector).
day of event, 1 ... 31 (numeric vector).
hour of event, 0 ... 23 (numeric vector).
minute of event, 0 ... 59 (numeric vector).
second of event, 0 ... 59 (numeric vector).
number of days (and fractions) from the beginning of 1974.
These data originate from the Beijing Catalogue which is administered by the China Seismological Bureau, Beijing.
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