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6145 |
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Date: November 12, 2015 at 14:35:48
From: Roger Hunter, [DNS_Address]
Subject: Puzzling results |
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Hi all;
Since certain prediction ideas involve triggering at
special distances I decided to look into it.
I wrote a program which looks at all mag 7.5 quakes as
main shocks (large enough for distance triggering) and
mag 6+ as possible triggered quakes.
The program finds a mag 7.5 quake, then calculates the
distance to all subsequent quakes within a year. These
are added to an array of 1 degree bins from 0 to 179
degrees.
This continues until no more main quakes are found.
The array sums are then printed to a file for
examination.
I expected only minor differences in the counts but
such was not the case. For example there were no quakes
in the degrees from 0 to 38 but 128 in the 39 degree
bin. The largest count of 1520 was at 127 degrees and
there were none farther than 163 degrees.
I have no explanation for this. Anybody have any ideas?
Roger
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Responses:
[6146] [6147] [6148] [6149] [6150] [6151] [6152] [6153] |
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6146 |
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Date: November 15, 2015 at 18:33:36
From: anne redwood city, [DNS_Address]
Subject: Re: Puzzling results |
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something to do with inverted U curves or sine wave frequencies or doubling back/reverberations from some kind of interference?
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Responses:
[6147] [6148] [6149] [6150] [6151] [6152] [6153] |
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6147 |
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Date: November 15, 2015 at 19:07:55
From: Roger Hunter, [DNS_Address]
Subject: Re: Puzzling results |
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Anne;
I have no idea.
Roger
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Responses:
[6148] [6149] [6150] [6151] [6152] [6153] |
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6148 |
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Date: November 17, 2015 at 08:43:48
From: marc / berkeley, [DNS_Address]
Subject: Re: Puzzling results |
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Roger-
How did you determine zero ordinate for each event?
--Marc
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Responses:
[6149] [6150] [6151] [6152] [6153] |
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6149 |
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Date: November 17, 2015 at 12:37:32
From: Roger Hunter, [DNS_Address]
Subject: Re: Puzzling results |
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What do you mean by "zero ordinate"?
I was simply measuring distances.
Roger
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Responses:
[6150] [6151] [6152] [6153] |
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6150 |
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Date: November 17, 2015 at 13:45:06
From: marc / berkeley, [DNS_Address]
Subject: Re: Puzzling results |
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Ah, I see.
I re-read your post. It was the degree bins that I was
assigning a true theta value, not a distance.
So now I ask, does the distance actually equate to a lat
long degree distance? (there are other coordinate systems:
UTMs, NAD24, NAD83, WGS84).
But I get the gist.
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Responses:
[6151] [6152] [6153] |
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6151 |
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Date: November 17, 2015 at 16:31:12
From: Roger Hunter, [DNS_Address]
Subject: Re: Puzzling results |
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marc;
The program take a center lat/lon and an aftershock
lat/lon and computes the distance in degrees. It's a
simple spherical trig problem.
Roger
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Responses:
[6152] [6153] |
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6152 |
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Date: November 17, 2015 at 16:38:52
From: Roger Hunter, [DNS_Address]
Subject: Re: Puzzling results |
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I was expecting a relatively uniform distribution.
Skywise pointed out that it should be bell shaped around
90 degrees but was not because most quakes were around
the ring of fire which is bigger.
I can't think of an easy way to show what's happening
except for a map showing the quakes and a 127/128 degree
circle - and that's a lot of work.
Roger
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Responses:
[6153] |
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6153 |
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Date: November 18, 2015 at 09:25:26
From: marc / berkeley, [DNS_Address]
Subject: Re: Puzzling results |
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No I got it. You're getting a right skewed Bell curve
with really odd endpoints.
Or is it even odder than that?
--M
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Responses:
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