- Ellipse of various types when electrical
noise and moderate EQ signal are present.

- Almost circles when electrical noise and high
level EQ signal are present.

recorded by two monitoring sites are processed by the
"strange attractor" methodology.

So what is the use of such Ellipses and Circles?
Just remember what is called "strange attractor" in the earthquake
prediction topic. Each point of a circle is the intersection of the azimuthal directions of the earth's electric field recorded by the two
monitoring sites. Therefore, a specific point is the
epicenter of the EQ which generates the recorded signals. The
seismological target is to determine the epicenter of the EQ which
creates such a "strange attractor" electric EQ precursor.

The specific problem was solved as follows:

A hypothetical monitoring array was adopted, consisted
of two (2) monitoring sites M1, M2 and a hypothetical random EQ, all of
known X, Y coordinates. Next, the theoretical Ellipses or Circles were determined in
pair M1-M2. At the next step the EQ with X, Y coordinates were
ignored and an inversion process was applied on Ellipses or Circles by using a
random pair of EQ X, Y coordinate values as initial guess. The results are
presented in live form graphs for random EQ location and as total
array, using joint inversion methodology.

Each graph consist of two parts. The left is the
main live presentation, controlled by the buttons below it and the right
one which presents all the parameters of the process and how these
change along it.

Note that the graph scale changes automatically
matching its time the full size of the calculating graph.