Possible Electromagnetic Effects on Abnormal Animal Behavior Before an Earthquake.

Area of Science:

• Geophysics
• Seismology
• Animal Behavior

Background:

• Statistical properties of unusual animal behavior before earthquakes (EQs) were previously summarized by Rikitake (1998).
• Key parameters include epicentral distance (D) and precursor time (T).

Purpose of the Study:

• To compare statistical properties of animal behavior anomalies with seismo-electromagnetic effects.
• To investigate potential links between electromagnetic phenomena and pre-earthquake animal behavior.

Main Methods:

• Characterization of animal behavior using three plots: EQ magnitude (M) vs. D, log T vs. M, and log T occurrence histogram.
• Comparison of these plots with data from seismo-electromagnetic effects (radio emissions, atmospheric/ionospheric perturbations).

Main Results:

• Lower frequency electromagnetic emissions (ULF and ELF) show similar temporal evolution to abnormal animal behavior.
• A product of field intensity and duration of noise may be crucial for pre-EQ animal behavior.

Conclusions:

• A strong correlation exists between ULF/ELF electromagnetic emissions and animal behavior anomalies preceding earthquakes.
• The intensity and duration of electromagnetic noise are significant factors influencing precursory animal behavior.