Faculty Profiles - TAKENAKA Hiroshi

MISC - TAKENAKA Hiroshi

Division display 1 - 20 of about 351 ／ All the affair displays >>

Microtremor exploration in Tsushima Campus, Okayama University

Nobuyuki YAMADA, Hiroshi TAKENAKA

OKAYAMA UNIVERSITY Earth Science Reports 30 ( 1 ) 13 - 20 2024.3

Onset time and location of the main rupture of the 2018 Hokkaido Eastern Iburi, Japan, earthquake

OKAYAMA UNIVERSITY Earth Science Reports 29 ( 1 ) 49 - 63 2023.3

CMT解による観測点補正値を用いた沖縄本島南東沖の地震の震源再決定

小松正直, 喜多村萌以, 竹中博士

日本地震学会秋季大会講演予稿集(Web) 2022 S04-01 2022.10

海水層および海底地盤構造が海面地震動に与える影響の評価

中村武史, 竹中博士

日本地震学会秋季大会講演予稿集(Web) 2022 2022.10

東北地方太平洋沖地震震源域の波形トモグラフィー：分解能行列の検討

岡元太郎, 竹中博士, 中村武史

日本地震学会秋季大会講演予稿集(Web) 2022 2022.10

Estimation of subsurface motion from surface seismic records (2): improvement of the method based on the quantitative evaluation

渡邉禎貢, 竹中博士, 小松正直, 大島光貴

日本地球惑星科学連合大会予稿集(Web) 2022.5

地形を考慮した陸海統合3 次元地震波速度構造モデルを用いた大分県周辺の長周期地震動シミュレーション

奥仲達也, 小松正直, 竹中博士, 吉見雅行, 中村武史, 岡元太郎

岡山大学地球科学研究報告 28 ( 1 ) 27 - 103 2022.3

東北地方太平洋沖地震震源域の波形トモグラフィーに向けた波動場の検討

岡元太郎, 竹中博士, 中村武史

日本地震学会秋季大会講演予稿集(Web) 2021 S01P-05 2021.10

水平成層構造での海面～海中における水中音響波形計算―海水層による増幅・減幅の影響評価－

中村武史, 竹中博士

日本地震学会秋季大会講演予稿集(Web) 2021 S01P-03 2021.10

2016年熊本地震で誘発された大分県中部の地震の初動読み取りと震源決定

髙崎雄大, 小松正直, 渡邉禎貢, 竹中博士, 大島光貴

日本地震学会秋季大会講演予稿集(Web) 2021 S19P-01 2021.10

地表観測記録を用いた地中地震動の推定：深い評価点における検討

渡邉禎貢, 竹中博士, 小松正直, 大島光貴

日本地球惑星科学連合大会予稿集(Web) 2021 2021.6

Estimation of displacement waveforms by baseline correction of near-fault acceleration records of the 2016 Kumamoto earthquake with median filter

Okayama University Earth Science Report 27 ( 1 ) 39 - 50 2021.3

Authorship：Last author Language：Japanese Publishing type：Rapid communication, short report, research note, etc. (bulletin of university, research institution)

The 2016 Kumamoto earthquake sequence occurred on April 14 (MJMA 6.5) and April 16 (MJMA 7.3). Seismic intensity of 7 on the Japan Meteorological Agency (JMA) scale was observed in Mashiki Town, Kumamoto Prefecture for the both events and in Nishihara Village, Kumamoto Prefecture for the April-16 event. We estimate the displacement waveforms from these acceleration records. Since the acceleration seismograms include the long-period noise due to tilting of the ground and instrumental effects, the baseline corrections are required to derive the accurate velocity and displacement waveforms. We apply a median filter to the velocity waveforms to identify the linear trends on them due to the steplike noise on the acceleration records, and determine the time at which baseline shifts take place and the step value of each shift for the baseline correction through trial and error. Our baseline correction can successfully reconstruct the velocity and displacement waveforms from the acceleration records. The displacement waveforms show the static components consistent with the geodetic data.

DOI： 10.18926/ESR/61959

CiNii Article

CiNii Books

researchmap

Synthetic nearfield seismograms at a subsurface position in a horizontally layered half-space

Okayama University Earth Science Report 27 ( 1 ) 29 - 38 2021.3

Authorship：Lead author Language：Japanese Publishing type：Rapid communication, short report, research note, etc. (bulletin of university, research institution)

We extend the computational code of Takenaka and Sasatani (2000) for synthetic nearfield seismograms for horizontally layered elastic media, based on the reflection/transmission matrices and the discrete wavenumber summation method, to calculate seismic motion and its spatial derivatives at a subsurface position in the attenuative media. In this paper we describe the theory of this extension and show some numerical examples to verify the extended code.

DOI： 10.18926/ESR/61956

CiNii Article

CiNii Books

researchmap

北海道南西沖地震に伴う津波 : 小樽から礼文島まで (復刻北海道南西沖地震と津波 : 2部津波(1))

後藤章夫, 高橋浩晃, 宇津木充, 小野忍, 西田泰典, 大島弘光, 笠原稔, 竹中博士, 斉田智治

月刊地球 = Chikyu monthly 42 ( 4 ) 214 - 219 2020.4

Theoretical analysis of the long-period velocity pulses observed in the 2016 Kumamoto Earthquake Sequence

垂水洸太郎, 渡邉禎貢, 小松正直, 竹中博士

日本地震学会秋季大会講演予稿集(CD-ROM) 2020 2020

CMT solutions of earthquakes around Okinawa island from strong-motion records by using a land-ocean unified 3D structure model

小松正直, 小割啓史, 渡邉禎貢, 岡元太郎, 中村武史, 竹中博士

日本地震学会秋季大会講演予稿集(CD-ROM) 2020 2020

Initial rupture process of the 2018 Hokkaido Eastern Iburi earthquake inferred from 2D/3D source imagings

藤本怜, 小松正直, 竹中博士

日本地震学会秋季大会講演予稿集(CD-ROM) 2020 2020

Analytical solution of near-field term, intermediate term, far-filed term, and quasi-static displacement due to rectangular fault in a homogeneous whole space

垂水洸太郎, 竹中博士

日本地球惑星科学連合大会予稿集(Web) 2020 2020

CMT solutions of the 2016 central Oita earthquakes using near-field strong motion records

小割啓史, 小松正直, 竹中博士, 岡元太郎, 中村武史, 吉見雅行, 林田拓己

日本地球惑星科学連合大会予稿集(Web) 2020 2020

Estimation of seismic motion at depth from records at a ground surface station without assumption of plane wave incidence

渡邉禎貢, 竹中博士, 小松正直, 大島光貴, 中村武史

日本地球惑星科学連合大会予稿集(Web) 2020 2020

　 PREV - NEXT 　

< TAKENAKA Hiroshi >

MISC - TAKENAKA Hiroshi