On 11 May, 21:32, Harold Brooks wrote:
In article 30a432ce-2306-46be-b385-ae23c6a4ff0a@
24g2000hsh.googlegroups.com, says...

U. S. G E O L O G I C A L S U R V E Y

E A R T H Q U A K E D A T A B A S E

FILE CREATED: Fri May 9 10:00:11 2008
Global Search Earthquakes= 12
Catalog Used: NOAA
Date Range: Year: 1971 - 1971 Month: 01/Day: 01 Month: 12/
Day: 31
Magnitude Range: 7.0 - 10.0
Data Selection: Significant Earthquakes World Wide (NOAA)

Why would the NEIC be using a NOAA database if it were in error?

It's not so much in error as it is different. It goes back earlier in
time than the USGS data.

Thus making it a superior source of data for the years specified?
"Welcome to the World Data Center for Solid Earth Geophysics, Boulder.
The WDC for SEG is maintained by the National Oceanic and Atmospheric
Administration (NOAA), National Geophysical Data Center (NGDC) in
Boulder, Colorado.

Data come from surface, aircraft and satellite platforms. See our list
of datasets held by the WDC for SEG."

http://www.ngdc.noaa.gov/geomag/wdc/

http://www.globalcmt.org/cgi-bin/glo.../form?itype=ym...

So I search for quakes of 7 M or more falling between 90 south and 90
north and whatever the full circle is east and west and every day from
January the first to December the thirty first inclusive and the
search misses half of them and it's my fault because I failed to read
the fine print?

I can't seem to find the details in your previous posts. A bit dense I
know, so what am I going to do?

Improve your reading comprehension. Go to the NEIC site that you
searched from and select "USGS/NEIC (PDE) 1973 - Present"

I don't think I'll find many earthquakes from 19~ 50, 51, 52, 60, 61,
62, 70 or 72 on that will I?