By Mary S. Lazaridou-Varotsos
As evidenced dramatically and tragically in 2011 alone,earthquakes reason devastation and their results when it comes to human ache and fiscal catastrophe can final for years or perhaps a long time. The VAN approach to earthquake prediction, in accordance with the detection and size of low frequency electrical signs known as Seismic electrical indications (SES), has been researched and evaluated over 30 years, and now constitutes the single earthquake prediction attempt that has ended in concrete winning effects. This e-book recounts the background of the VAN strategy, detailing the way it has built and been established lower than foreign scrutiny.
Earthquake Prediction through Seismic electrical Signals
• describes, step-by-step, the improvement of the VAN technique for the reason that 1981;
• explains either the theoretical version underpinning the learn and the actual houses of SES;
• analyzes the SES recordings and the prediction for every significant earthquake in Greece over the past 25 years;
• introduces a brand new time area, average time, which performs a key function in predicting forthcoming catastrophic events.
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Extra resources for Earthquake Prediction by Seismic Electric Signals: The success of the VAN method over thirty years
Second, the newspaper Eleftherotypia wrote: The Hellenic Association of Physicists (HAP) has withdrawn from the EPPO meeting with the accusation that the associations involved in it and convened to decide the practical use of the VAN method, give an impression that precludes any positive aspect of the method, before even examining first whether there may be or may not be practical exploitation. After the Athens Academy, the HAP withdrawal from the EPPO creates serious problems for its continued operation.
So basically we measure the potential difference between two points A and B on the Earth’s surface and this is called a (measuring) electric dipole, hereafter termed simply dipole. When the SES is detected, the potential difference between the two points changes by ΔV, dividing this value by the distance L between the two electrodes, for example 100 meters, is the ratio of ΔV/L, which tells you the change of the electric field of the Earth in the direction AB. To find the total change of the electric field of the Earth, however, we must also simultaneously measure in a second direction, for example the one that is perpendicular to AB.
The question was whether recording would be possible. In other words, this weak electrical signal could be covered (shaded), by electrical noise. (As we all know, in our homes and industries, there are electrical apparatus and installations that are “grounded”, so any “parasitic” current goes to earth, thus producing “man-made” electrical signals which could shade the preseismic weak electrical signal emitted by a natural source, such as an earthquake). We could check this by undertaking measurements in the active area where, as mentioned, we expected that earthquakes would continue for some time.
Earthquake Prediction by Seismic Electric Signals: The success of the VAN method over thirty years by Mary S. Lazaridou-Varotsos