[M-IS06] Extreme Weather and Disasters in Southeast Asia

[MIS06-P03] Observation of lightning strike location using infrasound sensors in the Philippines

*Hideaki Miyajima¹, Hisayuki Kubota¹, Yukihiro Takahashi¹, Mitsuteru Sato¹, Sho Yui¹ (1.Hokkaido University)

Keywords:infrasound, lightning

Flooding caused by heavy rainfall has caused significant damage in the Philippines. Rainfall forecasting could help mitigate the damage. Prediction of rainfall could be made possible by examining the correlation between the total energy of lightning strikes and rainfall. The objective of this study is to estimate the location and total energy of lightning strikes using infrasound sensors. We developed a sensor system that includes an infrasound sensor and peripheral electrical circuitry. Sensor systems were installed at three of the observation points of the lightning and weather observation network being constructed in Metro Manila, Philippines. At this moment lightning activity was not detected by the sensor, even though it was observed by other instrument. Possible causes for this include problems with sensor thresholds. Therefore, we developed upgraded sensor system that can continuously record raw waveform data. These sensor systems were installed at three lightning and meteorological observation stations in Manila, Philippines. The data obtained from the sensor system is currently being analyzed. We also plan to estimate of lightning strike locations in two ways, TOA (Time of Arrival) and TDOA (Time Difference of Arrival).