Preliminary Results from the Active/Passive San Francisco Volcanic Field Nodal Seismic Experiment in Northern Arizona
Description:
Distributed volcanic fields pose significant hazards to population centers around the world. For many of these systems, there is limited knowledge about the nature of short- and long-term magma storage in the crust and how this storage influences the composition and eruptive styles of the distributed volcanism. The San Francisco Volcanic Field (SFVF) in Northern Arizona is one of the most active cases of distributed volcanism in the western U.S. This region is distinguished by its compositional diversity of eruptive products and by the highly explosive basaltic eruption that occurred at Sunset Crater around 1085 CE. To better understand the structural details of the magmatic system that feeds the SFVF, an active/passive nodal seismic experiment was conducted between August 2023 and November 2024. The first stage of this experiment was focused on monitoring seismicity associated with the active portion of the volcanic field and involved the recording of 12 months of near-continuous data at 47 nodal seismometer locations within 30 km of the Sunset Crater eruption. The second stage expanded the array to 586 nodal seismometers to cover the entire SFVF (~17500 km2). This array recorded four 2,000-lb. borehole shots and background seismicity during a month-long deployment. Preliminary results from this data set will be presented that characterize the distribution of seismicity associated with regional fault systems and the SFVF magmatic system. In addition, initial body wave tomography models will be presented which will be used to infer the locations of present-day magma storage as well as regions of pluton formation beneath the SFVF.
Session: Earth’s Structure from the Crust to the Core [Poster]
Type: Poster
Date: 4/16/2025
Presentation Time: 08:00 AM (local time)
Presenting Author: Eric
Student Presenter: No
Invited Presentation:
Poster Number: 97
Authors
Eric Kiser Presenting Author Corresponding Author ekiser@arizona.edu University of Arizona |
Sankha Subhra Mahanti ssmahanti@arizona.edu University of Arizona |
Jim Bradford jimbradford@arizona.edu University of Arizona |
Ryan Porter Ryan.Porter@nau.edu Northern Arizona University |
Patrick Chindandali prc65@nau.edu Northern Arizona University |
Cong Li congli87@arizona.edu University of Arizona |
Joseph Phillips jp2888@nau.edu Northern Arizona University |
Claire Richardson crricha5@asu.edu Arizona State University |
Pratik Santra pratiksantra@arizona.edu University of Arizona |
Sebastian Tauber st886@nau.edu Northern Arizona University, Flagstaff, Arizona, United States |
Grace Ward gaw97@nau.edu Northern Arizona University, Flagstaff, Arizona, United States |
Alan Juarez-Zuniga ajzu@arizona.edu University of Arizona, Tucson, Arizona, United States |
Jack Flanigan flanigan@arizona.edu University of Arizona, Tucson, Arizona, United States |
Pranabendu Moitra pmoitra@arizona.edu University of Arizona, Tucson, Arizona, United States |
Preliminary Results from the Active/Passive San Francisco Volcanic Field Nodal Seismic Experiment in Northern Arizona
Category
Earth’s Structure from the Crust to the Core