Shallow Imaging of the Valles of Caldera, Northern New Mexico: Preliminary Results From Ambient Noise Tomography
Description:
The Valles Caldera in northern New Mexico is part of the Jemez Volcanic Field, formed from two rhyolitic eruptions <1.5 Ma. The caldera resides at the confluence of several major tectonic regimes; to the west, the caldera is bounded by the Colorado Plateau and Laramide structures and to the east, overlies the Rio Grande Rift. We present a preliminary ambient noise tomography model of the Valles Caldera and its relationship to the Rio Grande Rift, using data from the Los Alamos Seismic Network (LASN). In this inversion, we use 14 broadband stations from LASN which span ~40 km across the Caldera and Rio Grande Rift. Vertical (ZZ) component cross-correlations for 98 station-pairs were computed using one-hour overlapping time windows spanning from 2018 to the 2024. Phase and group velocity analysis are estimated using traditional frequency-time analysis. The LASN dataset, spanning over five decades, offers an opportunity for comprehensive temporal and spatial analyses across the Valles Caldera. Preliminary results show low Rayleigh wavespeeds beneath the caldera, extending beneath the east extension of the Jemez Volcanic Field and Rio Grande Rift.
Session: Earth’s Structure from the Crust to the Core [Poster Session]
Type: Poster
Date: 5/2/2024
Presentation Time: 08:00 AM (local time)
Presenting Author: Emily
Student Presenter: No
Invited Presentation:
Authors
Emily Rodriguez Presenting Author Corresponding Author eer@lanl.gov Los Alamos National Laboratory |
Carly Donahue cmd@lanl.gov Los Alamos National Laboratory |
Peter Roberts proberts@lanl.gov Los Alamos National Laboratory |
Nathan Maier nmaier@lanl.gov Los Alamos National Laboratory |
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Shallow Imaging of the Valles of Caldera, Northern New Mexico: Preliminary Results From Ambient Noise Tomography
Category
Earth’s Structure from the Crust to the Core