In article 30a432ce-2306-46be-b385-ae23c6a4ff0a@
24g2000hsh.googlegroups.com, says...
On May 9, 10:34 pm, Harold Brooks wrote:
In article abadbb16-3d4a-4d3a-982c-2e9ffe16d985
@k37g2000hsf.googlegroups.com, says...

This is from the NEIC: 5.5 Magnitude earthquake at 23:21 on 8th May
2008.

18 hours since the last one, therefore a storm brewing maybe. It is
certainly heading that way.

From NEIC, based on the ~1500 M5+ earthquakes per year, there are about
480 M5.5+ earthquakes per year, or about 1 every 18 hours. (There have
been 43 5.5 or larger quakes in the last 30 days.)

What did you make of the facts I pointed out to you earlier? A series
of years with less than 8 quakes of 7 M and over per annum.

I made of it that you didn't know how to do the search on the NEIC
website. The NOAA catalog of significant earthquakes, which is what you
searched, has less than half of the earthquakes that the NEIC database
has. For 1990-2, from your search, NOAA had 9, 6, and 13, respectively.
Searching the NEIC database gives 18, 18, and 24. If you had looked at
"USGS/NEIC (PDE) 1973 - Present", instead of "Significant Worldwide
Earthquakes (2150 B.C. - 1994 A.D.)", you'd have gotten a very different
answer.

This was a NOAA site?
NEIC: Earthquake Search Results

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)


CAT YEAR MO DA ORIG TIME LAT LONG DEP MAGNITUDE IEFM
DTSVNWG DIST

NFPO km
TFS

NOAA 1971 01 10 0717 -3.20 139.70 34 8.10 MsNOAA
9D.. .......
NOAA 1971 02 04 1533 0.50 98.70 40 7.10 MsNOAA
9D.. .......
NOAA 1971 05 22 1643 38.80 40.50 3 7.00
MsNOAA .C.. .......
NOAA 1971 06 17 21 -25.40 -69.40 76 7.00 MsNOAA
5C.. .......
NOAA 1971 07 09 0303 -32.50 -71.30 58 7.50 MsNOAA
9C.. .T.....
NOAA 1971 07 14 0611 -5.50 153.90 47 7.90 MsNOAA
7C.. .T.....
NOAA 1971 07 26 0123 -4.90 153.20 43 7.90 MsNOAA
6D.. .T.....
NOAA 1971 07 27 0203 -2.70 -77.40 135 7.50 MsNOAA
7C.. .......
NOAA 1971 09 05 1835 46.80 141.20 9 7.70 MsNOAA
9D.. .T.....
NOAA 1971 10 27 1758 -15.60 167.20 49 7.10 MsNOAA
7C.. .......
NOAA 1971 11 24 1935 52.90 159.20 106 7.50
MsNOAA .... .......
NOAA 1971 12 15 0829 55.90 163.40 30 7.80 MsNOAA
XF.. .......

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.


I was wondering, too, why the National oceans and Atmosphere people
were storing seismic tables. It turns out they are chargeds with the
responsibility of storing most of the USA's geophysics data:

"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.

The WDC SEG maintains extensive data and documentation compilations in
a number of geophysical and environmental disciplines, including
historic tsunamis, significant earthquakes, Earth magnetism,
paleomagnetism, topography, gravity, and ecosystems.

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/

It's not my problem whatever you think. Here is the search from a
different catalogue:
Global CMT Catalog
Search criteria:

Start date: 1976/1/1 End date: 1977/1/1
-90 =lat= 90 -180 =lon= 180
0 =depth= 1000 -9999 =time shift= 9999
0 =mb= 10 0=Ms= 10 7=Mw= 10
0 =tension plunge= 90 0 =null plunge= 90

Results
010176A KERMADEC ISLANDS REGION

Date: 1976/ 1/ 1 Centroid Time: 1:29:53.4 GMT
Lat= -29.25 Lon=-176.96
Depth= 47.8 Half duration= 9.4
Centroid time minus hypocenter time: 13.8
Moment Tensor: Expo=26 7.680 0.090 -7.770 1.390 4.520 -3.260
Mw = 7.3 mb = 6.2 Ms = 0.0 Scalar Moment = 9.56e+26
Fault plane: strike=202 dip=30 slip=93
Fault plane: strike=18 dip=60 slip=88

011476A KERMADEC ISLANDS

Date: 1976/ 1/14 Centroid Time: 15:56: 7.5 GMT
Lat= -29.69 Lon=-177.04
Depth= 46.7 Half duration=20.0
Centroid time minus hypocenter time: 32.6
Moment Tensor: Expo=27 4.780 -0.490 -4.300 0.830 3.620 -1.320
Mw = 7.8 mb = 6.3 Ms = 0.0 Scalar Moment = 6.02e+27
Fault plane: strike=200 dip=26 slip=95
Fault plane: strike=15 dip=64 slip=88

011476B KERMADEC ISLANDS REGION

Date: 1976/ 1/14 Centroid Time: 16:47:44.8 GMT
Lat= -28.72 Lon=-176.75
Depth= 17.7 Half duration=20.5
Centroid time minus hypocenter time: 11.3
Moment Tensor: Expo=27 2.560 0.180 -2.740 3.580 6.770 -1.230
Mw = 7.9 mb = 6.5 Ms = 8.0 Scalar Moment = 8.18e+27
Fault plane: strike=189 dip=11 slip=71
Fault plane: strike=28 dip=80 slip=93

012176A KURIL ISLANDS

Date: 1976/ 1/21 Centroid Time: 10: 5:33.6 GMT
Lat= 44.58 Lon= 149.49
Depth= 26.5 Half duration= 9.3
Centroid time minus hypocenter time: 9.5
Moment Tensor: Expo=26 3.210 -1.490 -1.720 2.870 5.330 -1.840
Mw = 7.2 mb = 6.3 Ms = 7.0 Scalar Moment = 6.91e+26
Fault plane: strike=237 dip=16 slip=116
Fault plane: strike=30 dip=76 slip=83

020476A GUATEMALA

Date: 1976/ 2/ 4 Centroid Time: 9: 1: 7.2 GMT
Lat= 15.14 Lon= -89.78
Depth= 16.3 Half duration=13.8
Centroid time minus hypocenter time: 23.8
Moment Tensor: Expo=27 -0.350 -0.780 1.120 0.380 -0.470 1.670
Mw = 7.5 mb = 6.2 Ms = 7.5 Scalar Moment = 2.04e+27
Fault plane: strike=254 dip=73 slip=-10
Fault plane: strike=347 dip=80 slip=-162

032476A KERMADEC ISLANDS

Date: 1976/ 3/24 Centroid Time: 4:46:16.4 GMT
Lat= -29.99 Lon=-177.51
Depth= 54.1 Half duration= 8.1
Centroid time minus hypocenter time: 12.0
Moment Tensor: Expo=26 3.670 0.120 -3.780 0.070 1.780 -1.410
Mw = 7.0 mb = 6.4 Ms = 6.8 Scalar Moment = 4.34e+26
Fault plane: strike=206 dip=34 slip=103
Fault plane: strike=11 dip=57 slip=81

050576A KERMADEC ISLANDS

Date: 1976/ 5/ 5 Centroid Time: 4:52: 2.6 GMT
Lat= -29.84 Lon=-177.43
Depth= 41.8 Half duration= 7.9
Centroid time minus hypocenter time: 11.6
Moment Tensor: Expo=26 3.630 0.040 -3.660 0.150 1.800 -1.750
Mw = 7.0 mb = 6.2 Ms = 6.8 Scalar Moment = 4.39e+26
Fault plane: strike=211 dip=34 slip=105
Fault plane: strike=13 dip=57 slip=80

060376A NEW IRELAND REGION

Date: 1976/ 6/ 3 Centroid Time: 16:44:53.1 GMT
Lat= -4.75 Lon= 153.47
Depth= 85.9 Half duration= 8.7
Centroid time minus hypocenter time: 14.3
Moment Tensor: Expo=26 5.110 -1.330 -3.780 -1.270 2.650 2.710
Mw = 7.1 mb = 6.2 Ms = 0.0 Scalar Moment = 6.08e+26
Fault plane: strike=143 dip=31 slip=83
Fault plane: strike=331 dip=59 slip=94

062076A NORTHERN SUMATERA

Date: 1976/ 6/20 Centroid Time: 20:53:23.5 GMT
Lat= 3.18 Lon= 96.24
Depth= 19.1 Half duration= 7.5
Centroid time minus hypocenter time: 10.1
Moment Tensor: Expo=26 2.430 -0.020 -2.410 1.120 -1.680 1.840
Mw = 7.0 mb = 6.3 Ms = 7.0 Scalar Moment = 3.55e+26
Fault plane: strike=338 dip=28 slip=99
Fault plane: strike=147 dip=62 slip=85
http://www.globalcmt.org/cgi-bin/glo...upe2=90&list=0


Respectfully, the problem is yours. You've failed to complete this
search. Do it again, go to the bottom of that page, and click on the
highlighed "More solutions" in the phrase "More solutions with same
search criteria" and you'll see the rest of the year with an additional
8 earthquakes meeting the criteria.

Perhaps you would care to put me right and give me a link to a search
of a catalogue more to your tastes? Maybe include the parameters?

I don't particularly have "a catalogue more to [my] tastes." I was only
pointing out that you were being inconsistent in the comparison. If you
had read the post you replied to (and included in your reply), you would
have read "If you had looked at 'USGS/NEIC (PDE) 1973 - Present',
instead of 'Significant Worldwide Earthquakes (2150 B.C. - 1994 A.D.)',
you'd have gotten a very different answer."


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" instead of
"Significant Worldwide Earthquakes (2150 B.C. - 1994 A.D.)"

Harold
--
Harold Brooks
hebrooks87 hotmail.com