ロシア・カムチャツカ半島アバチンスキー火山での傾斜観測

• Main Authors: 高橋, 浩晃, 青山, 裕, 大園, 真子, 田中, 良, 伊藤, ちひろ, 渡邉, 早姫, 松島, 健, 山下, 裕亮, 宮町, 宏樹, 奥山, 哲, ゴルディエフ, エフゲニー, ムラビヨフ, ヤロスラフ, マグースキン, キリル, マリック, ナタリヤ, ミノロフ, イワン, チェブロフ, ダニラ
• Format: Article in Journal/Newspaper
• Language: Japanese
• Published: 北海道大学大学院理学研究院
• Subjects: 450; Kamchatka
• Online Access: http://hdl.handle.net/2115/73387; https://doi.org/10.14943/gbhu.82.11

Tiltmeter observation network with 4 stations were installed on active Avachinsky volcano, Kamchatka, Russia, in 2017. Bubble tilt sensors were equipped on base of pit. Waveform of a distance earthquake recorded at AVCT and UGLT stations indicated that the sensors were normal. Observation data for 9 days suggested long term tilt change of 30 μrad at AVCT and 300 μrad at UGLT, respectively. Daily tilt fluctuation at UGLT might reflect larger daily temperature change of air due to shallow pit depth. Proper pre-processing filtering is required based on noise characteristic investigation.