A detailed view into the eruption clouds of Santiaguito volcano, Guatemala, 
using Doppler radar

Scharff, L.; Ziemen, F.; Hort, M.; Gerst, A.; Johnson, J.B.

doi:10.1029/2011JB008542

アイテム詳細

登録内容を編集ファイル形式で保存

一時保存へ追加

タグ情報を表示リリース履歴を表示詳細要約

公開

学術論文

A detailed view into the eruption clouds of Santiaguito volcano, Guatemala, using Doppler radar

MPS-Authors

Ziemen, F.
Ocean Physics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society;
IMPRS on Earth System Modelling, MPI for Meteorology, Max Planck Society;

External Resource

There are no locators available

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

フルテキスト (公開)

jgrb16982.pdf
(出版社版), 4MB

付随資料 (公開)

There is no public supplementary material available

引用

Scharff, L., Ziemen, F., Hort, M., Gerst, A., & Johnson, J. (2012). A detailed view into the eruption clouds of Santiaguito volcano, Guatemala, using Doppler radar. Journal of Geophysical Research: Solid Earth, 117:. doi:10.1029/2011JB008542.

引用: https://hdl.handle.net/11858/00-001M-0000-000F-89D4-D

要旨

Using Doppler radar technology we are able to show that eruptions at Santiaguito volcano, Guatemala, are comprised of multiple explosive degassing pulses occurring at a frequency of 0.2 to 0.3 Hz. The Doppler radar system was installed about 2.7 km away from the active dome on the top of Santa Maria volcano. During four days of continuous measurement 157 eruptive events were recorded. The Doppler radar data reveals a vertical uplift of the dome surface of about 50 cm immediately prior to a first degassing pulse. Particle velocities range from 10 to 15 m/s (in the line of sight of the radar). In 80% of the observed eruptions a second degassing pulse emanates from the dome with significantly higher particle velocities (20-25 m/s again line of sight) and increased echo power, which implies an increase in mass flux. We carry out numerical experiments of ballistic particle transport and calculate corresponding synthetic radar signals. These calculations show that the observations are consistent with a pulsed release of material from the dome of Santiaguito volcano.