Development of the broadband seismometer to construct a seismic network in ultimate environmental areas

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K21600
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Solid earth and planetary physics; Natural disaster / Disaster prevention science
• Research Institution: The University of Aizu (2016-2017); National Astronomical Observatory of Japan (2015)
• Principal Investigator: Yamada Ryuhei 会津大学, コンピュータ理工学部, 特別研究支援者 (60647379)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 広帯域地震計 / 地震観測 / 極限環境域 / 回路設計

Outline of Final Research Achievements

In this study, I have developed a broadband seismometer applicable to ultimate environmental areas such as ocean bottom, active volcanic area, polar region and lunar and planetary bodies. This broadband sensor is designed based on the short-period sensor loaded on the penetrator system for lunar exploration. I have designed and manufactured the negative feedback circuit and enlarged the resonant period of the seismometer from 1 second to 30 seconds,and this achieved the preliminary model of high sensitive, small and light-weights broadband seismometer.The ground test has been performed to investigate the response to ground motions in comparison to a commercially broadband seismometer in the seismic vault, and it found that our broabdand sensor could response to not only seismic events but also micro tremor. It has been recognized that reduction in the noise caused from the seismometer and investigation of the temprature characteristic should be future works.

Free Research Field

固体地球惑星物理学