[M-TT45] インフラサウンド及び関連波動が繋ぐ多圏融合地球物理学の新描像

[MTT45-P05] フンガトンガ・フンガハアパイ火山の噴火によって励起された気圧変動の伝播

*岩國 真紀子¹、新井 伸夫²、乙津 孝之¹、本橋 昌志¹、藤井 孝成¹、野上 麻美¹ (1.一般財団法人　日本気象協会、2.名古屋大学減災連携研究センター)

キーワード：インフラサウンド、微気圧計

Japan Weather Association (JWA) has maintained and managed the infrasound observation system (MB2000, manufactured by CEA/DASE) in Chiba Prefecture since 2005, as a component of the International Monitoring System for CTBT's verification scheme. Based on such experiences, JWA installed and have managed the infrasound observations systems (Model 6000-16B, manufactured by Paroscientific, Inc., USA) in Iwate and Mie, and Aichi Prefectures for research purpose to apply infrasound technology to disaster mitigation.

On January 15, 2022, the Hunga Tonga-Hunga Ha'apai volcano erupted, then all infrasound observation systems of JWA observed the characteristic signals, which have a period of about 30 minutes (Lamb wave) and similar shape among all observation sites. In this presentation, we discuss the similarities and propagation of these signals over Japan.