Gravity induced earthquakes
Posted by EQF on November 23, 2002 at 10:17:21:

This is most of the text of a report which I posted a short time ago to a number of Internet Newsgroups including sci.geo.earthquakes.

Date: November 23, 2002

CONTENTS:

1. Gravitational Triggering Of Earthquakes
A. Computer Programs
B. Sun – Earth – Moon Distances Versus Sun And Moon Position Latitudes And Longitudes
C. Earthquake Triggering And Sun - Earth – Moon Distances
2. A Question For Astrophysics Experts

This information is intended mainly for people who are interested in earthquake forecasting and triggering related phenomena. However, computer programming and astrophysics are also involved.

1. GRAVITATIONAL TRIGGERING OF EARTHQUAKES

Some scientists and others believe that earthquakes can occur and some precursors or earthquake warning signals can be generated when the moon is closest to the Earth, causing its gravitational pull to be strongest. Many also believe that planetary alignment can be important to those triggering processes etc. For the first time as far as I am aware, certain types of data regarding this subject matter are becoming available at a publicly accessible Web site:

Seismic Activity and Storm Data
http://www.freewebz.com/eq-forecasting/131.html

On the lower part of that Web page there is a table which contains data related to earthquakes, precursor signals, the positions of the sun and the moon in the sky, and their proximity to the Earth at the times when the earthquakes listed there occurred.

A. Computer Programs

In some of my recent Newsgroup notices I discussed the development of certain types of computer programs. They would be used to automatically generate the types of data listed on that Web page. At the moment I am generating them using manual processes, adding them to the report, and then storing it at the Web site. This is something which could be and should be done automatically by one or more Web site CGI computer programs. And I am planning to try to get some government agency or university research group etc. to develop those programs and generate the data.

B. Sun – Earth – Moon Distances Versus Sun And Moon Position Latitudes And Longitudes

Up until now my research has focused on how the latitudes and longitudes of the positions of the sun and the moon in the sky and the locations of ocean and Solid Earth Tide crests and troughs affect earthquake precursor generation and triggering processes. I am now starting to expand those studies to include effects related to the distance changes which take place between the Earth and the moon and the Earth and the sun during each month and each year. And I was a little surprised by the first results of those studies.

In that table there are two columns which have the headings “clon” and “glon.” The “clon” longitudes show where the combined gravitational pulls of the sun and the moon would be strongest at some location on the surface of the Earth when only the latitudes and longitudes of the positions of the sun and the moon in the sky are taken into account. The “glon” longitudes represent that same type of data but with gravitational effects associated with sun – Earth – moon distance changes being factored in. Assuming my calculations are correct then it can be seen that at times those two numbers can differ by as much as 10 longitude degrees. I was surprised that they could be that different.

At the moment I am generating more data and examining them in an effort to determine which of those numbers is a better indicator of how earthquakes are being triggered and how precursor signals are being generated. Simple logical assumptions do not appear to be especially reliable here perhaps because ocean tide related forces etc. can complicate the situation.

C. Earthquake Triggering And Sun - Earth – Moon Distances

In the second half of that data table there is a list of several dozen earthquakes most of which were destructive. The numbers in the columns with headings marked t, a, g, and “emdist” indicate how strong several different gravitational factors were when those earthquakes occurred. 9 would indicate when the forces are strongest. 1 indicates when they are weakest.

Numbers in the “g” column represent the strength of the combined gravitational pulls of the sun and the moon at the point where they are strongest on the Earth’s surface at the time of the earthquake. And numbers in the “emdist” column show the distance between the Earth and the moon at that time.

It is my theory and that of some other people that gravitational forces linked with sun – Earth – moon distances can create time windows during which earthquakes in certain locations may be more likely to occur. However those “g” and “emdist” numbers for the destructive earthquakes listed in that table range from high to low values. And that suggests to me that sun – Earth – moon distances by themselves probably cannot be easily used to forecast specific earthquakes.

2. A QUESTION FOR ASTROPHYSICS EXPERTS

With those gravity calculations I have assigned the moon/sun gravity strength ratio a maximum value of 2.5. Sun – Earth – moon distances and the positions of the sun and the moon in the sky are then used to adjust that value downward for each earthquake and precursor. That particular number was obtained from a U.S. government report which discusses forces which control ocean tides.

Does anyone have an opinion regarding the accuracy of that number? I can easily change its value in my calculations and do plan to eventually look at how it affects different earthquake and precursor related latitude and longitude numbers etc.

The information in this report represents expressions of personal opinion.


Follow Ups:
     ● Re: Gravity induced earthquakes - Petra Challus  20:43:33 - 11/23/2002  (17426)  (1)
        ● Newsgroup discussions regarding gravity induced earthquake triggering - EQF  08:53:19 - 11/24/2002  (17427)  (1)
           ● Re: Newsgroup discussions regarding gravity induced earthquake triggering - Petra Challus  11:51:21 - 11/24/2002  (17429)  (2)
              ● Re: Newsgroup discussions regarding gravity induced earthquake triggering - EQF  10:49:00 - 11/25/2002  (17435)  (0)
              ● Re: Newsgroup discussions regarding gravity induced earthquake triggering - Cathryn  01:15:41 - 11/25/2002  (17432)  (2)
                 ● Re: Hey Girl - Petra Challus  20:27:45 - 11/25/2002  (17440)  (0)
                 ● Re: Newsgroup discussions regarding gravity induced earthquake triggering - Canie  08:56:37 - 11/25/2002  (17433)  (1)
                    ● Re: Newsgroup discussions regarding gravity induced earthquake triggering - Cathryn  15:53:03 - 12/7/2002  (17519)  (0)