EARTHQUAKE TRIGGERING FORCES AND
PHENOMENA
EARTHQUAKE DATA FINGERPRINTS
WAVE CHARTS
--- Data for the years 1990 through 2005 ---
Latest Update: December 26, 2011
This present Web page is a slightly altered version of the following
much older Web Page.
And, some of the links on this present page do not work.
Earthquake
Triggering Forces And Phenomena
Some of the very large files that were stored in the past on the
older Web page are not available on this present Web page.
THE OBJECTIVES OF THIS WEB PAGE
This Web page attempts to provide professional and amateur earthquake researchers around the world with information regarding possible links between earthquakes, earthquake precursors, and easily observed and measured forces and phenomena such as the gravitational pulls of the sun and moon and the Solid Earth Tide. It is hoped that this information will enable them to do the following:
*** Use the technology to forecast some of their own earthquakes.
*** Make important discoveries regarding how earthquakes are being triggered; in other words, to learn why they are occurring at the times when they are occurring.
If you wish to learn how to forecast earthquakes then perhaps one of the most important things to have is an understanding of why they are occurring when they are occurring. And many scientists apparently believe that there are presently no understandable and easily verifiable data available which show how earthquakes are being triggered. The charts and discussions being presented here should clearly show those data are in fact now available and also show how additional data can be easily generated by both professional and amateur earthquake researchers.
It could be quite important that this research be quickly expanded into formal and informal international studies of the subject matter.
If any Web site visitors discover what they believe might be other relationships in the data shown on this Web page and they would like to share that information then they can try sending it to: seismic@ix.netcom.com
Accuracy Note: The data discussed in this Web page are believed to be
accurate. However they should not all be simply trusted without
question. Many different types of calculations were used to generate and
display them. And it would be impossible to guarantee that they are all
free from error.
TABLE OF CONTENTS
Summaries Of Several Of The Most Important Theories
Linking
Precursor Signals With The Earthquakes Responsible For Them
Why
Earthquakes Occur When They Occur
WAVE
CHARTS
Observations - Theories - Conclusions
Identifying And Working
With Significant Data Subsets
Time Cycles And Earthquake Occurrence
Times
Powerful Earthquakes And The Sun - Earth - Moon Angle
Earthquake
Magnitude, Gravity Related Forces,
And Fault Zone Environment Related Force
Angles
Some Of The Important Force Angles
Forces Can Combine To Produce
Earthquake Triggering Time Windows
Earthquake Occurrence Time
Patterns
Earthquake Precursors And Earthquakes
Nuclear Tests And High
Magnitude Earthquakes
Unusual Earthquake Lull
EARTHQUAKE
DATA FINGERPRINTS
The Gravity Point
Earthquake Triggering
Symmetry
Adjusted Ocean Tide And Solid Earth Tide Crest And Trough
Longitudes
Positive Earthquake Identification
Summary
Wave Chart Term
Definitions References
SUMMARIES OF SEVERAL OF THE MOST IMPORTANT
THEORIES
*** Sun And Moon Gravity Related Force Strength, And Fault Zone Environment Related Force Angles Are Important To Earthquake Triggering Times - Earthquakes often occur when their fault zones have accumulated enough strain energy that they are getting close to fracturing on their own, and they are then bent, stretched, and compressed in certain directions by sun and moon gravity related cyclic forces and phenomena such as the Solid Earth Tide. The gravity related force strengths have a greater impact for higher magnitude earthquakes. Force angles associated with environmental factors such as a fault zone's north & south or east & west orientation have a greater impact for lower magnitude earthquakes.
*** Forces Combine To Produce Earthquake Triggering Time Windows - Fault zone bending, stretching, and compression effects associated with forces or phenomena having different repetition time length cycles frequently combine to produce earthquake triggering time windows which can last for several days. During those time windows there is an increased probability that an earthquake will be triggered.
*** Earthquake Occurrence Times Follow Certain Patterns - For time periods having durations of several months or more, earthquake precursor and global earthquake triggering times can follow certain types of patterns. For example, a powerful earthquake and some of its aftershocks might occur around the same time each month for several successive months.
Those theories are discussed in greater detail on the following Web page:
Earthquake Triggering, Precursors, and
Sensitivity
http://www.freewebs.com/eq-forecasting/128.html
Visual Perspective: Unless otherwise indicated, with the sun, earth, and moon drawings in this report the observer is always looking down at the Earth from somewhere out in space above the North Pole.
LINKING PRECURSOR SIGNALS WITH THE EARTHQUAKES
RESPONSIBLE FOR THEM
The left side of the following drawing would represent an ideal precursor and earthquake situation. Clearly defined precursors are being detected before each of the three earthquakes. The right side of drawing illustrates what we actually observe. Precursors for the three earthquakes are detected at what appear to be random times.
This report outlines two procedures which can be used to match those random looking precursor signals on the right side of the drawing with the proper earthquakes. Those procedures are referred to as Wave Chart and Earthquake Data Fingerprint technologies. In order to explain how they work some theory information will first be presented regarding earthquake triggering processes. These theories are summarized in greater detail in the following Web page:
Earthquake Triggering,
Precursors, and
Sensitivity
http://www.freewebs.com/eq-forecasting/128.html
WHY EARTHQUAKES OCCUR WHEN THEY OCCUR
Strain gradually builds in earthquake fault zones as the result of tectonic plate movement etc. Fault zone rock layers bend and change their chemical and physical characteristics in order to absorb the strain. Eventually the accumulated energy becomes so great that the fault zone fractures resulting in an earthquake. It represents the abrupt release of large amounts of that stored strain energy.
Some researchers including myself believe many or most earthquakes often occur when a fault zone is bent, compressed, or stretched in a particular direction by phenomena such as the Solid Earth Tide. And the exact moment that it will fracture is often linked with two groups of forces or phenomena. Those are forces or phenomena which are directly and/or indirectly related to the gravitational pulls of the sun and the moon such as the Solid Earth Tide, and fault zone environmental factors such as its north and south or east and west orientation.
For example, the following drawing proposes that a fault zone running east and west (EW) may fracture when the gravitational pulls of the sun and the moon pull it towards the north and the south at the same time. And a fault zone running north and south (NS) may fracture when the gravitational pulls of the sun and the moon pull it towards the east and the west at the same time.
If we could tell how all of the fault
zones around the world were being bent, stretched, and compressed at every point
in time then that might enable us to tell when they were likely to fracture and
cause an earthquake to occur. However it is presently impossible to make
direct strain measurements like that for very many fault zones. And in an
attempt to obtain some information regarding what might be taking place in all
of them I have created the following Wave Chart and Earthquake Data
Fingerprint procedures which produce "synthetic" computer generated types of
strain data.
See also: Using The
Wave Charts To Forecast
Earthquakes
http://www.freewebs.com/eq-forecasting/130.html
One theory proposes that earthquake triggering is linked with the proximity of the moon to the Earth. Another proposes that it is linked with the position of the moon in the sky relative to the sun. And yet another proposes that it is linked with the acceleration of the Earth in space. The Wave Charts show what the values of quite a few forces or phenomena were when powerful and important earthquakes occurred around the world. That type of information should help earthquake researchers determine exactly what the important earthquake triggering forces are.
The Wave Charts also show that earthquake triggering is often being controlled by certain time cycles.
In this report's first large Wave Chart,
*** BLACK And RED Vertical Lines Represent Earthquakes - The black lines represent earthquakes with magnitudes of 8 or greater. The red lines represent destructive earthquakes. Most of the destructive ones for years earlier than 2003 were reported to have claimed at least 100 lives.
*** BLUE Vertical Lines Represent Earthquake Precursors - The earthquake precursors are presently believed to be electromagnetic energy field fluctuations which are linked with earthquake fault zone, geomagnetic, and perhaps solar storm related energy field interactions.
The following drawing provides a picture type of explanation for what the waves in the Wave Charts represent. Just beneath the drawing there are several references to sections in this Web site's Help Page which contain detailed text explanations for what they represent. The meaning of the term Gravity Point will be briefly discussed first because it is particularly important. And it would probably be unfamiliar to most people.
The Gravity Point - This is the location on the Earth's surface where the combined gravitational pulls of the sun and the moon are strongest. Because the moon gravity pull on the Earth is roughly twice as strong as the sun gravity pull, the location of the Gravity Point is always in the general area of the point on the Earth's surface which the moon is directly above even when the sun is on the opposite side of the Earth from the moon. The Gravity Point can be as much as 25 longitude degrees to the east or west of the moon longitude depending on the location of the sun relative to the moon. And it can be as much as 15 latitude degrees distance from the moon latitude in the direction of the sun latitude or a few degrees distance from the moon latitude in the opposite direction from the sun latitude.
The Gravity Point is discussed in more detail in the Earthquake Data Fingerprints section of this report.
Wave Chart Term Definitions References Those more detailed text explanations for what the waves in the Wave Charts represent, how calculations were performed, and what the original data sources were etc. can be found in this Web site's Help Page.
7.00 to 8 +
magnitude earthquakes That chart contains similar data for earthquakes
in the 7.00 and greater magnitude range. Black lines represent 8 +
magnitude ones, blue lines are 7.50 to 7.99 magnitude ones, and red lines are
7.00 to 7.49 magnitude ones.
Blank Wave Chart for
the years 1990 through 2005 That is a blank version of the
90-05a.gif and 90-05d.gif Wave Charts. It contains no earthquake time
lines and is intended for use by earthquake researchers and forecasters.
OBSERVATIONS - THEORIES - CONCLUSIONS
A sizeable number of conclusions can be drawn and theories can be formed from an examination of the Wave Charts. Just a relatively few have been listed here. Present plans call for a gradual expansion of this list.
Using The Wave Charts To Forecast Earthquakes - This particular area of science is quite literally in its infancy. And significant discoveries are being made on a regular basis. It is sufficiently important and it is evolving so rapidly that it is being discussed on a separate Web page:
Using The Wave Charts To
Forecast Earthquakes
http://www.freewebs.com/eq-forecasting/130.html
Identifying And Working With Significant Data Subsets - An Important
Consideration For Doing Successful Earthquake Triggering Research - Studies done
on general earthquake data apparently frequently generate relatively few useful
results. The data often look like random numbers. One key to success
appears to be to identify and then work with earthquake data subsets which show
significant trends. Tremendous numbers of earthquakes have been recorded
over the years. And there are often enough to study in a given subset that
conclusions which are drawn will be statistically valid.
For example,
One of the charts in this report plots the magnitudes of several hundred 7.0 and higher magnitude earthquakes versus the sun - Earth - moon angle. And the results look somewhat random. However, another chart presented here shows that if the 8 and greater magnitude earthquake subset of that dataset is used then the results are both impressive and probably quite significant. And a detailed study of the earthquakes in that data subset versus other earthquakes should produce a considerable amount of useful information.
For another example, with a chart not presented here earthquake longitudes for those 7 and greater magnitude earthquakes were plotted against the sun - Earth - moon angle. And once again the data had a random appearance. However the following drawing is a plot of that sun - Earth - moon angle versus longitude for about 150 earthquakes which were reported to be destructive or at least strongly felt.
I believe that the circled groups of data points clearly show that destructive or strongly felt earthquakes in western Pacific ocean areas are occurring when the sun and moon are in specific locations in the sky relative to one another.
I also believe that there is some significance to the fact that earthquakes to the left of that second circled group from the top followed what appears to be a distinct line.
Time Cycles And Earthquake Occurrence Times - As the Wave Charts may be demonstrating, earthquake occurrence times are controlled in part by a number of different time cycles. The Wave Charts focus on some of the most important of those cycles which are about a month long and which contain 4 shorter time cycles, each about 7 days long. Another of the most important time cycles is roughly 25 hours long. It also contains 4 shorter time cycles with each being about 6.25 hours long. Data on the following Web pages and in the Earthquake Data Fingerprints section of this report focus more on those 25 hour time cycles
http://www.freewebs.com/eq-forecasting/133.html
http://www.freewebs.com/eq-forecasting/132.html
Reports at another researcher's Web site contain data regarding earthquake triggering times and the Changes in Earth Acceleration in Space (Impulse) time cycle. http://www.grandunification.com/hypertext/Earthquakes2002.html
Powerful Earthquakes And The Sun - Earth - Moon Angle - The following drawing shows that most of the magnitude 8 and greater earthquakes referred to in this Web page's main chart occurred at times when the sun and moon were relatively close to one another in the sky. The view in the drawing is what an observer would see while looking down at the Earth from somewhere out in space above the North Pole. Object sizes and distances in the drawing are not to scale.
Those 17 high magnitude earthquakes occurred when the differences between the longitude lines which the sun and the moon were directly above at those times were the following: 40E, 25E, 12E, 10E, 9E, 4E, 19W, 27W, 33W, 35W and 89W, 126W, 161E, 120E, 118E, 94E, 79E. In each case the moon longitude was that many degrees to the east or west of the sun longitude.
10 of those 17 earthquakes, roughly 60%, occurred when those longitude differences were between 40 degrees east (the moon was to the east of the sun in the sky) and 35 degrees west (the moon was to the west of the sun in the sky). That 75 degrees represents only about 20% of the total possible longitude difference range of 360 degrees. The probability of that happening by chance is fairly low. And that suggests that very powerful earthquakes are usually being triggered by some force or phenomenon which has a maximum value around the time when the sun and moon are close to one another in the sky. The data in the main chart show that any of a number of forces or phenomena might have been the most important one for a given earthquake.
Earthquake Magnitude, Gravity Related Forces, And Fault Zone Environment Related Force Angles - Present theories propose that earthquake occurrence times are often controlled by two groups of forces or phenomena: ones related to the gravitational pulls of the sun and the moon such as the Solid Earth Tide, and environmental factors such as a fault zone's north - south or east - west orientation. The strength of the gravity related forces are often quite important for the most powerful earthquakes. As the shift is made to lower magnitude earthquakes environmental factors become increasingly important. And as the following plot of the several hundred 7.0 to 7.9 and 8+ magnitude magnitude earthquakes shows, as the shift is made to lower magnitude earthquakes their occurrence times can have a more random appearance.
That random appearance for lower magnitude earthquakes can also be seen by comparing occurrence times for the 8+ magnitude earthquakes in this Web page's first Wave Chart (black vertical time lines) with the lower magnitude destructive earthquakes in that chart (red vertical time lines), and by comparing the 8 + magnitude ones in the following chart (black vertical time lines) with the lower magnitude ones (blue and red vertical time lines): 7.00 to 8 + magnitude earthquakes
The following drawing shows the percentage of
earthquakes in the 6.0 to 8.8 magnitude range for the years 1990 through 2003
which occurred when the sun was within + or - 90 longitude degrees of the moon
in the sky. The X axis shows the magnitude and the number of earthquakes
which occurred with that magnitude.
About 54% of those earthquakes which had a magnitude of 6.7 and higher occurred when the sun was within + - 90 longitude degrees of the moon.
Some Of The Important Force Angles - If an earthquake occurs in some
fault zone or if certain types of precursor signals are detected when the sun
and the moon are both directly above say 0W and 10S, then because of the
importance of the force angle, an earthquake or aftershock might occur in that
fault zone when:
--- The sun and moon are once again in that same location in the sky
(0W and 10S), or
--- When they are both on exactly the opposite side
of the Earth at 180W and 10N, or
--- When one of them is above 0W and
10S while at the same time the other is above 180W and 10N.
Another important triggering angle would involve a 90 degree difference between the positions of the sun and the moon in the sky. For example, the moon might be above 0W and 10S while the sun is above 90E or 90W, and 0N.
Several examples of how those force angles work can be seen by comparing the waves for the Afghanistan and Turkey earthquakes with the waves for the India earthquakes in the chart in a following section which discusses earthquake precursors.
Forces Can Combine To Produce Earthquake Triggering Time Windows - It can be seen that some of the waves in that first Wave Chart have different length repletion time cycles. For example, the moon gravity strength cycle or wave is somewhat out of phase with the sun - Earth - moon angle related cycles or waves. And most of the time those two different time cycles do not have wave crests at the same time. It can also be seen that in some cases earthquakes tend to occur when two or more waves with different time cycles crest at the same time. Several of the very powerful earthquakes occurred when those moon gravity and sun - Earth - moon angle time cycle waves did crest at the same time. The earthquake triggering time windows which result when different forces combine like that might be lasting for several days.
Earthquake Occurrence Time Patterns - As can be seen from this report's first Wave Chart, with the four destructive 1998 and 1999 earthquakes in Afghanistan and Turkey and with the five Earthquake Pairs in a chart in a following section which discusses earthquake precursors, earthquakes occurring at certain times appear to be following distinct patterns. (Earthquake Pairs are two or more earthquakes which appear to have been triggered in a similar manner.)
As the following drawing shows, one of
the most striking examples of those time pattern similarities could be the three
most powerful earthquakes which have occurred in recent years (China - left,
Alaska - center, and Japan - right). They all occurred at almost the exact
same locations in the waves. It is also interesting to note that with each
of them there was some geomagnetic storm activity about a week before the
earthquake.
Some of the other very powerful earthquakes which occurred during the past decade had somewhat similar triggering characteristics. Additional patterns can also be observed by examining the previously mentioned 25 hour time cycle data. Earthquake data in the following chart can also be checked for patterns: 7.00 to 8 + magnitude earthquakes
Earthquake Precursors And Earthquakes - As shown in the following chart which represents data extracted from the first Wave Chart, two of the best examples which demonstrate the existence of earthquake precursor - earthquake, and earthquake - earthquake triggering patterns can be seen with the February 4 and May 30, 1998 earthquakes in Afghanistan.
Both earthquakes (red vertical time lines) occurred in about the same location in that country. And both occurred at about the same locations on most of the chart waves as did the precursor signals (blue vertical time lines) which were detected on January 30 and May 26. The 25 hour time cycle Earthquake Data Fingerprint numbers for those earthquakes also match (shown below - the ac, am, ci, la, and sa numbers)
On May 27, 1998 a warning note was posted to the sci.geo.earthquakes Internet Bulletin Board letting people know that there was some evidence which suggested that an earthquake might be about to occur in either Iran or Afghanistan by May 30, 1998. The destructive May 30 earthquake did then occur during that time window.
The August 17 and November 12, 1999
earthquakes in Turkey which can also be seen in that chart were also good
examples of those earthquake pattern matches. Their 25
hour time cycle Earthquake Data Fingerprint numbers (shown above)
matched one another as well. However, as can be seen, the Turkey data do
not match the Afghanistan data.
Quite a few precursor signals were detected before that August 17 earthquake. But only one precursor signal (November 8) for either of those Turkey earthquakes is shown on the chart. It is probably fairly significant that all three of those precursor signals (2 - Afghanistan, 1 - Turkey) were detected when there was a crest in most of the chart waves.
Nuclear Tests And High Magnitude Earthquakes - It appears likely that during the decades long period of time when high yield nuclear tests were conducted on a regular basis, shock waves generated by those tests caused high magnitude earthquakes to occur earlier and with lower magnitudes than they would normally have. It was almost a year after the last high yield nuclear test was conducted in that continuous string of tests (until September 23, 1992) before the 8 + magnitude earthquakes began to once again occur (August 8, 1993). The Internet Web sites of other researchers discuss this subject matter in more detail. Quite a few of them can be found by doing a standard search.
Unusual Earthquake Lull - The first Wave Chart shows that from about February, 1996 to February, 1998 there were no 8 + magnitude earthquakes and only a few fairly destructive ones. Was that a coincidence? Or did it have something to do with the limited moon latitude range during that time period (17N to 19S versus 26N to 28S maximum for 1990 through 2003) or what appears to be relatively low geomagnetic storm activity? Might it have been related to that single nuclear test on October 27, 1995.
The basic concepts related to the Earthquake Data Fingerprints are fairly easy to understand. But then the subject matter starts to become quite complex. Only a few of the basic theories and data are being discussed in this report.
One of the primary goals of the Earthquake Data Fingerprint is to show what might be taking place in a fault zone with an accuracy level of a few minutes rather than several days or weeks as with the Wave Charts. Before an example of an Earthquake Data Fingerprint is presented the Gravity Point and Earthquake Triggering Symmetry concepts need to be discussed.
THE GRAVITY POINT
The following drawing shows the locations of the Sublunar Point, the Subsolar Point, the Gravity Point, and several of the sun - Earth - moon system barycenters (centers of mass) around which two or three of those bodies rotate around once each month and once each year.
The Gravity Point is the single most important location that I am presently aware of with regard to earthquake triggering processes. It is the location on the surface of the Earth where the combined gravitational pulls of the sun and the moon on the Earth are strongest. I believe that it may be directly above the monthly sun - Earth - moon rotation barycenter.
Relatively simple trigonometry calculations can be used to combine the locations of the Subsolar and Sublunar points in order to arrive at the location of the Gravity Point. A fixed value of 2.5 for the moon/sun gravitational pull strengths appears to produce good results. However, values in the range of perhaps 2.3 to 2.7 appear to also produce good results.
If ratio values other than 2.5 are used then the latitude and longitude of the Gravity Point changes. And the fact that this procedure still produces good results means that with the present accuracy of these procedures the exact location of the Gravity Point is not particularly important. The numbers being generated are compared with one another. And as long as the same sun/moon gravity strength ratio is used during the calculations this procedure appears to produce reasonably good results.
EARTHQUAKE TRIGGERING SYMMETRY
As the left side of following drawing shows, if an earthquake can be triggered in a given fault zone at 60E longitude degrees when the Gravity Point it at say 20W longitude degrees then it could also be triggered when the Gravity Point is at 110W, 160E, and 70E. Those locations are 90 longitude degrees apart. This is the concept of Earthquake Triggering Symmetry.
Similarly, as the right part of that drawing shows, if an earthquake occurs in a fault zone at 60E when the Gravity Point is at 20W longitude then the earthquake could have also occurred in fault zones at 30W, 120W, and 150E.
This Earthquake Triggering Symmetry effect also applies to the times when some earthquake precursors are generated. And as following drawing shows, that can provide forecasters with valuable information regarding when an expected earthquake might occur. The drawing shows the Earthquake Data Fingerprint Gravity Point and Sublunar Point information for those two highly destructive earthquakes which occurred in Afghanistan 1998 and the two which occurred in Turkey in 1999. It also contains three ocean tide and Solid Earth Tide Earthquake Data Fingerprint reference numbers.
Because of the Earthquake Triggering Symmetry effect all four of the longitude values (which are 90 degrees apart) associated with the Gravity Point and with the Sublunar Point can be represented by a single longitude for each of them. And as that drawing shows I myself use values which are in the 0W to 90W longitude range.
Those data demonstrate the tremendous potential of the Earthquake Data Fingerprint concept. The Gravity Point numbers for both earthquakes in each location and the associated warning signal agree with one another to within a few minutes' time out of about a 6 hour and 15 minute period of time. The Sublunar Point, ocean tide, and Solid Earth Tide numbers do not show that same excellent agreement. But they still provide invaluable comparison data which can be used to identify Earthquake Pairs such as those and to tell where an earthquake might be about to occur based on the Earthquake Data Fingerprint numbers for the earthquake warning signals.
The following drawing once again illustrates the relationship between the Gravity Point and Sublunar Point numbers and the positions of the sun and the moon in the sky. Remember that each of the Gravity Point and Sublunar Point numbers actually represents four different longitude values.
ADJUSTED OCEAN TIDE AND SOLID EARTH
TIDE CREST AND TROUGH LONGITUDES
In order to generate additional Earthquake Data Fingerprint numbers for the times when earthquakes occur and when precursor signals are detected the longitudes of ocean tide or Solid Earth Tide crests and troughs measured at a given location are added together. 45 longitude degrees are then added to that value to determine the location of the average crest or trough. And -180, -90, 0, 90, or 180 longitude degrees are then added to that average crest and trough location so that the value falls within the longitude range 0W to 90W degrees.
I myself am presently using ocean tide data for one location in the vicinity of Los Angeles, California, USA (LA 34N 118W) and another location in the western Pacific Ocean near Christmas Island (CI 10S 106E). I also use Solid Earth Tide data for one location in the South America area (0N and 75W).
As the following drawing shows, if the longitudes of the ocean tide or Solid Earth Tide crests and troughs have values of 104W, 12W, 62E, and 168E at the time when an earthquake occurs then when added together their combined longitude value would be 114E. That would represent a location about halfway between a tide crest and a tide trough. 45 longitude degrees would be added to that value to get 69E. That would represent the average location of a tide crest or trough. And that number would have -180, -90, 0, 90, or 180 longitude degrees added to it so that it would fall in the 0W to 90W longitude range, in this case 21W.
POSITIVE EARTHQUAKE IDENTIFICATION
The following drawing illustrates a tremendously powerful earthquake forecasting application for the Earthquake Data Fingerprint numbers. For demonstration purposes, made-up numbers are being used with this example.
As those hypothetical data illustrate, some earthquakes and earthquake aftershocks occurring in the same general area will have similar sets of Earthquake Data Fingerprint numbers. And other earthquakes and aftershocks occurring in that same area will have different sets of numbers.
4 of the 5 warning signals in that example matched earthquakes and aftershocks which had occurred in the past in the vicinity of 36N and 25W. And those matches served as accurate indicators that another earthquake could be about to occur there. When the earthquake did finally occur it matched the fifth warning signal.
Some precursor signals detected before an expected earthquake will often match one set of those Earthquake Data Fingerprint numbers like that while other precursor signals will match other sets of numbers. And if Earthquake Data Fingerprint numbers for a group of precursor signals are compared with numbers for past earthquakes and aftershocks as shown in that drawing then the identification of those multiple matches between sets of precursor signal and earthquake numbers can provide a forecaster with a tremendously powerful procedure for identifying the location of the expected earthquake and for eliminating other possible locations. That information can be combined with triangulation type procedures etc. in order to generate even more accurate earthquake forecasts.
Data processing computer programs can be used to automatically match groups of warning signals like that with past earthquakes.
SUMMARY
*** The times when many earthquakes are being triggered and when
certain precursor signals are being generated are controlled by one or more
forces or phenomena which follow cyclic patterns.
*** The Wave Charts demonstrate the existence of earthquake
triggering cycles which are about 30 days long.
*** The Earthquake Data Fingerprints demonstrate the existence
of other earthquake triggering cycles which are about 25 hours long.
*** Those 25 hour cycles involve an Earthquake Triggering
Symmetry effect which is linked with the Gravity Point, the location
on the Earth's surface where the combined gravitational pulls of the sun and the
moon are strongest.
*** Wave Chart and Earthquake Data Fingerprint data can
be invaluable for earthquake forecasting efforts and for doing earthquake
triggering research.
SEE ALSO
Wave Chart Term Definitions References
Earthquake Triggering, Precursors, and Sensitivity
Earthquake Triggering Processes
Using The Wave Charts To Forecast Earthquakes
Earthquake Forecasting Resources Web Page
Significant Earthquakes of the World
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