ALOS/PALSARによって観測された,アリューシャン列島・Okmok火山における2008年噴火
スポンサーリンク
概要
- 論文の詳細を見る
On July 12 (UTC), 2008, Okmok volcano in the Aleutian Islands began to erupt after a lapse of 11 years. Okmok volcano is located on Umnak Island in the Aleutian volcanic chain, and has erupted from an active vent located in the southwest part of the caldera floor more than 10 times since 19th century. Although there are few habitants around Okmok volcano, ash from the eruption could lead to catastrophic airplane accidents because of the heavy air traffic over the Aleutian Islands. In the 2008 event, ash plumes were emitted up to 15,000m above sea level from the new vent located close to the caldera center, not the active vent. JAXA carried out several observations using ALOS/PALSR before and after the eruption. PALSAR can observe the volcano surface even if it is emitting a great deal of smoke. Comparing images acquired before and after the eruption, we detected surface changes on and around the Okmok caldera and could locate new vents in the area close to the caldera center. Using DInSAR technique of PALSAR data acquired after the eruption, we detected a deflation of the volcanic edifice for the period at least one and a half months after the beginning of the eruption.
- 2009-03-15
論文 | ランダム
- 生命の思想(第7回)生・老・病・死
- 革新的技術戦略中間とりまとめ([平成20年]4月10日 第74回総合科学技術会議配付資料)
- 生命の思想(第6回)内なる無限--増え続ける生物種
- 生命の思想(第5回)ゲノムに刻まれる免疫系の
- 生命の思想(第4回)有限のゲノムの壁を超える仕組み(2)時空間の階層性