Gravity changes associated with atmospheric disturbances caused by the volcanic eruption in Tonga on January 15th, 2022, recorded by superconducting gravimeters in Japan

Yuichi Imanishi; Kazunari Nawa; Yoshiaki Tamura; Hiroshi Ikeda; Satoshi Miura

Presentation information

[J] Oral

S (Solid Earth Sciences ) » S-GD Geodesy

[S-GD02] Geodesy and Global Geodetic Observing System

Tue. May 24, 2022 1:45 PM - 3:15 PM 101 (International Conference Hall, Makuhari Messe)

convener:Yusuke Yokota(Institute of Industrial Science, The University of Tokyo), convener:Yuta Mitsui(Department of Geosciences, Shizuoka University), Koji Matsuo(Geospatial Information Authority of Japan), Chairperson:Yuta Mitsui(Department of Geosciences, Shizuoka University), Tomoaki Furuya(Geospatial Information Authority of Japan)

2:15 PM - 2:30 PM

[SGD02-03] Gravity changes associated with atmospheric disturbances caused by the volcanic eruption in Tonga on January 15th, 2022, recorded by superconducting gravimeters in Japan

*Yuichi Imanishi¹, Kazunari Nawa², Yoshiaki Tamura³, Hiroshi Ikeda⁴, Satoshi Miura⁵ (1.Earthquake Research Institute, The University of Tokyo, 2.AIST, 3.NAOJ, 4.KEK, 5.Tohoku University)

Keywords:Tonga volcano, superconducting gravimeter, atmospheric pressure

Atmospheric Lamb waves propagated around the world after the volcanic eruption in Tonga on January 15th, 2022. Large atmospheric disturbances and associated gravity changes were recorded at superconducting gravimeter stations in Japan. At Matsushiro station, signals of inertial acceleration due to atmospheric loading were clearly detected. Analysis results for other stations will be also reported.