Instantaneous detection of mega earthquakes by precise gravity field measurement

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13559
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: watada shingo 東京大学, 地震研究所, 助教 (30301112)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 重力 / 地震即時検知 / 重力測定 / 超伝導重力計 / 広帯域地震計 / 傾斜計 / 重力変化 / 巨大地震

Outline of Final Research Achievements

We have not detected the coseismic gravity perturbation before the arrival of seismic waves. The signal amplitude of theoretical signal waveforms based on a 2011 Tohoku earthquake source model is expected to be larger than the noise amplitude of the observed data. Since all of multi-component array observation of gravimeters, seismometers and tiltmeters failed to detect signals, we start reconsider the observation problem of gravity measurements with the instruments on the ground.

Free Research Field

固体地球科学