11:00 AM - 1:00 PM
[MTT45-P05] Propagating atmospheric acoustic wave in Japan by the Hunga Tonga-Hunga Ha'apai volcano eruption
Keywords:Infrasound, Sensitive Microbarograph
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.
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.