[O-11] Senior high school student poster presentations

[O11-P07] Earthquake prediction by Electric magnetic wave
Achieving disaster mitigation by detecting signs of damaging earthquakesⅥ

*Nayuta Minami¹, *Akito Okumura¹, *Sinnosuke Akimoto¹, *Taichi Takahashi¹, *Souya Brown¹, Naoya[ Shibata¹, Wakako Maruyama¹, Takeshi Abe¹, Tomoya[ Akatu¹, Rei Sonoyama¹ (1.Tokyo Metropolitan Tama High School of Science and Technology)

Keywords:Electromagnetic radiation associated with earthquakes, Earthquake precursor phenomena

1. Purpose To capture electromagnetic radiation, which is considered to be a precursor phenomenon of earthquakes, and to enable earthquake prediction. By observing electromagnetic radiation as a precursor, to predict earthquake magnitude and the area where the earthquake will occur from the relationship between signal strength, duration, and radiation direction data. To make it possible to detect precursor phenomena associated with damaging earthquakes using continuous observation methods. To introduce AI to quickly detect precursors. 2. Methods and Results The signal strength of electromagnetic waves emitted from the earth's surface into the atmosphere is continuously recorded using a VHF receiver. Antennas are installed at a height of 17m, and omnidirectional and directional antennas are used to identify the area of occurrence. Signal strength data, lightning data, ionospheric data, etc. are comprehensively judged to determine whether they are earthquake precursors. In addition, characteristics of observation data that occurred before the Great East Japan Earthquake are detected as points. It is hypothesized that precursor phenomena are not electromagnetic phenomena that occur only near the epicenter, but occur within shallow depth regions of the crustal surface due to stress on the crust caused by plate movement. 3. Discussion In this study, the only earthquake where the maximum value of electromagnetic radiation was observed at the same time as the earthquake occurred was the nearby earthquake of magnitude 5+ on September 12, 2015 in Chofu (epicenter in Tokyo Bay). If it were explained only by the piezoelectric effect, it would always be detected when the earthquake occurred, but there have been few detection cases. In the Shinjuku observation point data from the Great East Japan Earthquake, the signal level, duration, and occurrence frequency of electromagnetic radiation that normally occurs are different. The hypothesis is that the noise and movement of electric charges due to discharges emitted from near the observation point or near the ground surface such as active faults in the receivable area appear as a precursor to the earthquake. 4. Conclusion In order to confirm the hypothesis, identify the area where the signal is generated, and achieve disaster mitigation and prevention, we would like many researchers to conduct observations using current observation methods.