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SZ4D 2022 Community Meeting

November 14-16, 2022 | Houston, TX

preceded by an Early Career Event on November 13

in person or online



The first SZ4D Community Meeting took place in Houston, TX on November 14-16, 2022. An early-career event immediately preceded the meeting on November 13. Participants met in person and online to discuss the ongoing planning efforts associated with the Subduction Zones in Four Dimensions (SZ4D) initiative. This meeting provided an opportunity to discuss recent subduction zone science, update the community on the status of SZ4D, and solicit community feedback on next steps. In particular, input on near-future opportunities to seek funding for SZ4D needs.


The meeting was open to all.

About the meeting location

We realize that travel to certain parts of the country raises concerns for some members of our community. Acknowledging these concerns, the location for the Community Meeting was chosen to balance a number of competing priorities, including travel accessibility for both US and Chilean scientists and the availability of an affordable venue large enough to host the community meeting this fall. We plan to engage members of the community who cannot travel to Houston by providing opportunities for virtual participation throughout the meeting. All participants, both virtual and in-person, will be expected to abide by the SZ4D Code of Conduct.


Application for attending the meeting in person closed on September 30th. 


Decisions on participation and travel support took place in October.

Applicants were encouraged to complete a second, optional survey with demographic information to assess the audience reached for the SZ4D Community Meeting and for supporting diversity in meeting attendees. All responses were confidential, not tied to any identifiable information, and were only be discussed in assembled form (e.g. graphs, charts).


For questions related to the meeting, please contact the SZ4D Office at contact AT

Organizing Commitee

Mark Behn (Boston College, co-chair)

Donna Shillington (Northern Arizona University, co-chair)

Kasey Aderhold (IRIS)

Jade Bowers (Boise State University, EC workshop co-convener)

Behrooz Ferdowsi (University of Houston, EC workshop co-convener)

Anaïs Férot (UC Santa Cruz, SZ4D Office)

Melodie French (Rice University, EC workshop co-convener)

Krystin Poitra (IRIS)

Diana Roman (Carnegie)

David Sandwell (UC San Diego)

Justin Sweet (IRIS)




This meeting is supported by funding from the National Science Foundation under award EAR-2221949. Support was also provided by NSF through the MCS-RCN funded by EAR-1824343, workshop funding through OCE-1939512, and a supplement from OISE.

Presentation Collection

DAY 0 - November 13, 2022 | Early Career Event


DAY 1 - November 14, 2022

Plenary session 1: Introduction

Plenary session 2: SZ4D science 


Plenary session 3: Introduction to sites and allied activities


Breakout 1: SZ4D priorities for observations, models, and experiments

  • Introduction to Breakout 1 | Mark Behn

  • Group 1.1 - FEC1: Cottonwood 

  • Group 1.2 - FEC2: Dogwood 

  • Group 1.3 - FEC3: Arboretum V

  • Group 1.4 - LS1: Arboretum I

  • Group 1.5 - LS2: Arboretum II

  • Group 1.6 - MDE1: Arboretum III

  • Group 1.7 - MDE2: Arboretum IV

  • Groups 1.8x: Virtual Breakout Session - Zoom


DAY 2 - November 15, 2022

Plenary session 4: Report backs from Breakout 1

Report backs from Breakout 1


Plenary session 5: Crosscutting science and emerging methodologies/technology 1

  • Mechanical and hydrological processes governing slow landslide slip in an exhumed subduction mélange | Noah Finnegan

  • Capturing high-resolution subduction zone seismicity: Recent advances, current efforts, and continuing challenges |  Grace Barcheck

  • Crystals and glass as records of volcanic processes | Michelle Muth

  • Integrating efforts to build equity and capacity into pilot SZ4D science | Mike Brudzinski

Plenary session 6: Crosscutting science and emerging methodologies/technology 2

  • Investigating the transient friction of near-surface and subsurface fault zones using granular physics simulations and rheology experiments | Behrooz Ferdowsi

  • What has happened to the Chilean volcanoes in the 12 years since the 2010 Mw 8.8 Maule earthquake? A brief review of observations and models, with questions for the future | Cristian Farías

  • Integrating thermodynamic melting models and geophysical images to estimate magma reservoir conditions | Darcy Cordell

  • Shallow megathrust kinematics from seafloor geodesy | David Schmidt

Lightning talks

Breakout 2: Crosscutting science

  • Introduction to Breakout 2

  • ​Group 2.1: Cottonwood

  • Group 2.2: Dogwood

  • Group 2.3: Arboretum I

  • Group 2.4: Arboretum II

  • Group 2.5: Arboretum III

  • Group 2.6: Arboretum IV

  • Group 2.7: Arboretum V

  • Groups 2.8x: Virtual Breakout Session - Zoom

DAY 3 - November 16, 2022

Plenary session 6: Breakout 2 report back and best practices for collaboration

  • Breakout 2 report back

  • Funding strategies for large projects  | Maggie Benoit, NSF

  • Overview of next steps, including proposal opportunities | Emily Brodsky

  • Introduction to Breakout 3

Breakout 3: Next steps: upcoming proposals, how to facilitate collaboration and integration in SZ4D

  • Group 3.1 - MegaArray: Cottonwood 

  • Group 3.2 - SurfArray: Dogwood 

  • Group 3.3 - VolcArray: Mesquite 

  • Group 3.4 - Modeling: Rosebud 

  • Group 3.5 - Geology & Experiments: Imperial Ballroom West 

  • Group 3.6x: Virtual Breakout Session - Zoom

The SZ4D is committed to fostering the exchange of ideas and is dedicated to maintaining a safe, productive, and welcoming environment for all participants, no matter their function or their background. This includes respectful treatment of everyone.


All participants are required to abide by the Code of Conduct


COVID Protocol

This protocol has been put in place to help protect all meeting participants and reduce the spread of illness, including COVID-19.


All in-person participants will be required to wear masks, unless they are giving a live presentation, or actively eating or drinking.

  • Extra masks, as well as hand sanitizer, will be available to participants during the workshop

To the extent possible, participant seating should be arranged with an eye toward maintaining social distancing.

  • A large venue has been selected for this meeting to allow for more space

  • Some events, like the lunches and breakout rooms, may still require participants to be seated in close proximity

  • Provided meals have been limited to only those that maximize meeting time, lunches on Day 1 and Day 2


On-site rapid test kits will be available at no cost for any participants who feel unwell, have COVID-like symptoms, were exposed to someone else who tested positive, or request a test for another reason.

  • Tests will be readily and freely available to encourage their use by anyone

Supported participants are allocated single-occupancy rooms, rather than double-occupancy rooms.

The meeting website will feature a dedicated COVID page that is prominently featured and regularly updated so participants can easily stay informed on the evolving safety practices and policies we have in place, allowing them to make an informed decision.

  • We will inform all attendees of known positive COVID cases at the meeting

  • We also want to ensure transparency so participants feel empowered to decide for themselves whether they feel comfortable attending in person.


A list of nearby testing locations will be provided to attendees who want a PCR test.

  • A list of nearby testing sites (and the ability to book appointments) is available here.

There is no registration fee to be refunded should travel plans change for participants based on COVID considerations. We want to encourage participants who test positive for COVID, or think they may be sick to stay home. Presentations will be available through a virtual Zoom meeting that is also free to all attendees.

Poster information

Poster boards are 4'x8' (1.20m x 2.40m), landscape. Please plan your poster to fit within board dimensions.


SZ4D Community Meeting

November 14-16, 2022

early career event on November 13

Houston, Texas

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