catalogo de terremotos para america del sur catalog of earthquakes ...

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in any way checkea or edited. Areas covered by each country do not overlap,
so that when these catalogs are combined earthquakes should appear in the
catalog only once.
The catalogs cover a time period beginning with the earliest known
historical events and ending with Deceber 1981. The earliest event included
occurred in 1471. The completeness of tha catalog varies over Eime, bnlng
relatively ncomopl.ce for early historical events and much more complete for
recent. ,venitu . The lower magnitudo cutoff has been designated as 4.5 mb
,
Smaller events have not been vigorously eHiminated, particularly since many
events have no reported or calculated magnitude. The catalog, however, is
much less complete for events below magnitudc 4.5 mb.
A description of the hypocenter catalog format is listed in Appendix A.
Tables -3 cocrib codrs used in the format, Including references for the
sources ised. The two-letter country uode l;ogether with the five-digit
identif.-ing number (columns 2-9) provide a unique reference for each event.
The errors associated with quality factor codes for time, epicenter, and depth
are described in 7'bles 1, 2, and 3, respectively. Quality factors used by
other sources for hypocenter data, were converted to the factors defined for
this catalog as indicated in Tables 1, 2, and 3. These relationships were
determinecd hy L. Ocola in the early phanns of the catalog project. The code X
is used in all three tables when the quality is unknown or undefined. In many
cases, a good estimate of the error for the hypocenb,.. is not available, but
knowing whether tt is instrumentally determined or derived from macroselsmic
data gies some vadditinal information about the probable error. Therefore,
the codes M for macroseismic and I for instrumental have been used in place of
X for epicente; and deptlh quality factors if this information is known. Space