The Hawai’i Magmatic System Resolved by High-Resolution Traveltime Tomography
Description:
The volcanoes of Hawai’i island represent one of the most active volcanic systems in the world. The Hawaiian Volcano Observatory has been monitoring the activities of these volcanoes for more than 100 years. The long-term monitoring of the seismicity of this area provides an opportunity to determine the velocity structures underneath Hawai’i island. We present a study that utilizes over 700,000 local events recorded by 85 stations in the last 10 years for which P- and S-wave traveltime picks are obtained using PhaseNet. We invert these picks within an efficient adjoint-state Eikonal-tomography framework to retrieve the P- and S-wave structures of the area. The resolved velocity anomalies provide invaluable insights into the mechanisms with which fluids and melt move within the various magmatic chambers and how they eventually erupt to the surface from the complex network of volcanic conduits and vents. Moreover, the extent of the Vp and Vs anomalies allows the estimation of the melt fraction and the volume of eruptible material, enabling a better assessment of the volcanic hazard.
Session: Seismology's Role in Assessing Volcanic Hazard at Multiple Time Scales [Poster]
Type: Poster
Date: 4/18/2023
Presentation Time: 08:00 AM (local time)
Presenting Author: Jiaxuan Li
Student Presenter: No
Invited Presentation:
Authors
Ettore Biondi Corresponding Author ettore88@alumni.stanford.edu California Institute of Technology |
Weiqiang Zhu zhuwq@caltech.edu California Institute of Technology |
Jiaxuan Li Presenting Author jxli@caltech.edu California Institute of Technology |
Zachary Ross zross@caltech.edu California Institute of Technology |
Zhongwen Zhan zwzhan@gmail.com California Institute of Technology |
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The Hawai’i Magmatic System Resolved by High-Resolution Traveltime Tomography
Category
Seismology's Role in Assessing Volcanic Hazard at Multiple Time Scales