| DOI: | 10.1002/2013GL058836
|
| 论文题名: | Backprojection of volcanic tremor |
| 作者: | Haney M.M.
|
| 刊名: | Geophysical Research Letters
|
| ISSN: | 0094-10231
|
| EISSN: | 1944-9962
|
| 出版年: | 2014
|
| 卷: | 41, 期:6 | | 起始页码: | 1923
|
| 结束页码: | 1928
|
| 语种: | 英语
|
| 英文关键词: | backprojection
; magma-water interactions
; surface waves
; time reversal
; volcanic tremor
|
| Scopus关键词: | Earth sciences
; Geophysics
; Surface waves
; Back-projection
; Phreatomagmatic
; Rupture process
; Seismic networks
; Temporal evolution
; Time reversal
; Time-reversal methods
; Volcanic tremor
; Volcanoes
; deconvolution
; earthquake rupture
; image analysis
; magma
; microtremor
; phreatomagmatism
; seismic zone
; temporal evolution
; volcanic earthquake
; volcanic eruption
; wave field
; Alaska
; Aleutian Islands
; Fox Islands
; Okmok Volcano
; Umnak Island
; United States
|
| 英文摘要: | Backprojection has become a powerful tool for imaging the rupture process of global earthquakes. We demonstrate the ability of backprojection to illuminate and track volcanic sources as well. We apply the method to the seismic network from Okmok Volcano, Alaska, at the time of an escalation in tremor during the 2008 eruption. Although we are able to focus the wavefield close to the location of the active cone, the network array response lacks sufficient resolution to reveal kilometer-scale changes in tremor location. By deconvolving the response in successive backprojection images, we enhance resolution and find that the tremor source moved toward an intracaldera lake prior to its escalation. The increased tremor therefore resulted from magma-water interaction, in agreement with the overall phreatomagmatic character of the eruption. Imaging of eruption tremor shows that time reversal methods, such as backprojection, can provide new insights into the temporal evolution of volcanic sources. © 2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896411991&doi=10.1002%2f2013GL058836&partnerID=40&md5=df8ca793b8f7fd416809e0631ab9eb85
|
| Citation statistics: |
|
| 资源类型: | 期刊论文
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7495
|
| Appears in Collections: | 气候减缓与适应
|
|
There are no files associated with this item.
|
|
作者单位: | Alaska Volcano Observatory, U. S. Geological Survey Volcano Science Center, Anchorage, AK, United States
|
| Recommended Citation: | |
Haney M.M.. Backprojection of volcanic tremor[J]. Geophysical Research Letters,2014-01-01,41(6).
|
|
|