Amphibious Array Facility Workshop
Snowbird Resort , Snowbird , Utah , United States

Workshop Report Available for Download


This two day workshop will consider the future of the Amphibious Array of onshore and ocean-bottom seismometers (OBS’s) currently deployed as the Cascadia Initiative. The workshop will have two primary goals:

  1. to evaluate the ongoing Cascadia Initiative deployment of the Amphibious Array, which will have completed 3 of 4 years by the time of the workshop, and
  2. to make recommendations for the type, size and scope of future scientific studies using the Amphibious Array, identifying critical scientific targets and recognizing the capabilities of the Amphibious Array.

The first goal will be achieved through emphasis on technical or logistical reports that assess the current operations and instrumentation of the Amphibious Array, addressing issues such as instrument performance and data quality, the performance of OBS’s deployed in shallow waters, and integration of on-land with offshore operations. Understanding this performance will be needed to help define the scope of future deployments. The second goal will be achieved through a series of community recommendations to emerge for future deployments, considering critical scientific targets at a variety of scales and durations. Planning will focus on the EarthScope footprint and the period through 2018, although longer-term plans will be discussed.

Abstracts and White Papers 

Community contributions will form a critical aspect of the workshop discussions. If you plan to put forward either an abstract or white paper, then please register and submit an abstract by Tuesday, September 9 or a white paper by Tuesday, September 16.

Registration and Travel Support

Considerable travel support is available to enable attendance for this workshop. To be eligible, please register by Tuesday, September 9 and indicate your needed level of funding. All other registrations close on Tuesday, September 30.

For Students and Post-Docs

There is a special pre-workshop event on the evening of Wednesday, October 22. Students and post-docs requesting support should plan to attend this program.

Planning Committee

Geoff Abers Cornell University
Rob Evans Woods Hole Oceanographic Institution
Jeff Freymueller University of Alaska Fairfbanks
Jim Gaherty Lamont-Doherty Earth Observatory
Haiying Gao University of Massachusetts Amherst
Dan Lizarralde Woods Hole Oceanographic Institution
Susan Schwartz University of California, Santa Cruz
Doug Wiens Washington University in St. Louis
Bob Woodward IRIS Consortium

Contact Mary Baranowski with any logistical questions and Andy Frassetto if you have questions about registering or submitting abstracts/white papers.

Snowbird Resort is located in the Wasatch Mountains about 30 miles from Salt Lake City.  The meeting, any hosted meals and sleeping rooms will be at the Snowbird Cliff Lodge. For more detailed information on the hotel and meetings at Snowbird, visit

Support for Attendees

Funding from NSF is expected to cover a significant portion of travel and accommodation costs for approximately 86 participants (including 16 students) with a diversity of interests, including limited funds for international attendees. Registrants are asked to include a brief statement of interest and anticipated contribution to the workshop. Those requesting funds should register by Tuesday, September 9 and will be notified of funding decisions within two weeks.

Housing Reservations

A block of rooms are available at the Cliff Lodge.  To reserve a room, call Snowbird Central Reservations at 1-800-453-3000 and reference IRIS.  The group rate offered is $132/night, inclusive of taxes and fees.  A one night deposit will be charged at the time of booking. 

Please call for your room reservation before midnight on October 7 to guarantee a room at the group rate.

Note:  Travel support applicants should not book a hotel reservation until you have been notified of your application status.  Lodging reservations and costs will be arranged on behalf of supported attendees.  

Transportation from Salt Lake City International Airport (Airport Shuttle Service)

Canyon Transportation (1-800-453-3000), located in the baggage claim area adjacent to the carousels, offers round trip airport transfers from Salt Lake City International Airport to Snowbird. Typically the vans depart for Snowbird about every 30-45 minutes. The round trip fare per person is $72. The trip takes from 45 minutes to one hour. Reconfirm your return reservation at Guest Services in Cliff Lodge at least 24 hours prior to your departure. 

48 hours notice is required for all ground transportation cancellations.

Wednesday - October 22, 2014

5:00 PM - 8:00 PM Pre-workshop program for students and post-docs  
  Introductions – Rob Evans, Susan Schwartz (15 mins)  
  NSF remarks – Jennifer Wade (10)  
  Overview of AAF technical issues – Susan Schwartz (15)  
  Pop-up talks – Students and Post-docs (50)  
  Buffet dinner, discussion, and overview of Cascadia science – Anne Trehu (30)  

Thursday - October 23, 2014

7:00 AM - 8:00 AM Group breakfast  
8:00 AM - 9:00 AM

Session 1: Introductions, overview, NSF perspectives and goals, desired outcomes, Chairs: Rob Evans and Doug Wiens

  Purpose of workshop – Geoff Abers (15 mins)  
  Guidance from NSF – Donna Blackman, Greg Anderson, Jennifer Wade (20)  
  Perspective from the AASC Chair – Susan Schwartz (15)  
9:00 AM - 10:00 AM

Session 2: Cascadia - scientific and technical results, Chairs: Susan Schwartz and Jim Gaherty

  "The Cascadia Initiative: A Sea Change in Seismology" – Doug Toomey (40)  
  "Detection of Repeating Earthquakes Using Cascadia Initiative Data" – Sue Bilek (12)  
10:00 AM - 10:30 AM Break  
10:30 AM - 12:30 PM Session 2 (continued)  
  "Imaging the Downgoing Juan de Fuca Crust Using Receiver Functions from the Cascadia Initiative" – Helen Janiszewski (12 mins)  
  "Offshore Structure of the Cascadia Subduction Zone from Full-Wave Ambient Noise Tomography" – Haiying Gao (12)  
  "Ambient Noise as an Imaging Tool for the Juan de Fuca Plate" – Weisen Shen (12)  
  OBSIP-IC perspective on Cascadia (Title TBA) – John Collins (25)  
  Data handling, station performance, noise characteristics (Title TBA) – Jessica Lodewyck (25)  
12:30 PM - 1:30 PM Group lunch  
1:30 PM - 3:15 PM

Session 3: Ideas for future sites, deployments, and strategies, Chairs: Jeff Freymueller and Doug Wiens

  Southern Alaska – Peter Haeussler (20 mins)  
  Eastern U.S./Canada – Vadim Levin (20)  
  "Why Determining the Location and Shape of the North America Slab beneath the  Northeastern Caribbean Is Important for Earthquakes and Tsunami Risk Assessment for the Caribbean Region" – Liz Vanacore (5)  
  "Why Are SSE's Invading the Seismogenic Zone in the Guerrero Seismic Gap and How Can the Amphibious Array Answer That Question?" – Allen Husker (5)  
  "The Arctic Beaufort Sea Alaska, Yukon, Northwest Territories Margin and the Amphibious Array" – Roy Hyndman (5)  
  Aleutian Arc Structure – Geoff Abers (5)  
  "The Need to Extend the Cascadia Initiative Two More Years: Enabling Definitive Results for a Critical Region" – Emily Roland (5)  
  Lessons from Cascadia: Noise – Spahr Webb (15)  
3:15 PM - 4:00 PM General discussion, plan for breakouts and guidance  
4:00 PM - 4:30 PM Break  
4:30 PM - 6:00 PM Breakout group sessions: science motivators that require future the AAF  
  Group 1  
  Group 2  
  Group 3  
6:00 PM - 7:30 PM Poster session (with Hors d'oeuvres and cash bar)  
7:30 PM Dinner on your own  

Friday - October 24, 2014

7:00 AM - 8:00 AM Group breakfast  
8:00 AM - 8:30 AM Breakout group reports  
8:30 AM - 10:00 AM

Session 4: Other perspectives, techniques, data, science questions, and other country's plans, Chairs: Haying Gao and Geoff Abers

  "Imaging Subduction Seismogenic Zone: Marine Seismic Studies Around Japan" – Shuichi Kodaira (20 mins)  
  "Pacific Array" – Hitoshi Kawakatsu (20)  
  "Mapping Fluids Along Plate Margins with Amphibious Electromagnetic Exploration" – Kerry Key (12)  
  "Seafloor Geodesy: Techniques and Recent Advances" – Scott Nooner (12)  
10:00 AM - 10:30 AM Break  
10:30 AM - 11:00 AM

Session 4 (continued), Chairs: Jim Gaherty and Rob Evans

  "The Amphibious Array Facility: Good and Cheap" – William Wilcock (12)  
  "SeaJade Earthquake Observations in Cascadia Subduction Zone off Vancouver Island" – Koichiro Obana (5)  
  Observing Tremor on OBS – Aaron Wech (5)  
  Subduction Zone Observatories – Doug Wiens (5)  
11:00 AM - 11:45 AM General discussion, plan for breakouts and guidance  
11:45 AM - 12:45 PM Group lunch  
12:45 PM - 2:15 PM Breakout group sessions: Setting- or site-specific scientific opportunities  
2:15 PM - 3:30 PM Poster session  
3:30 PM - 5:00 PM

Session 5: Group discussion, identify consensus on a path forward, Chairs: Geoff Abers and Susan Schwartz

5:00 PM Adjourn  

The registration period for this workshop closed at Tue, September 30, 2014 - 11:59:00 PM.

Amphibious Array Facility Workshop Abstracts

View all Abstracts
Submitted By Title Category
Anne Trehu Performance of APGs during ChilePEPPER: calibration using tides and examples of earthquake, tsunami and possibly geodetic signals General Amphibious Array Science
Xiaowei Chen Analysis of microearthquakes in the Mendocino triple junction area using the Cascadia Initiative focused array Cascadia Science
Kerry Key Mapping fluids along plate margins with amphibious electromagnetic exploration General Amphibious Array Science
Samer Naif Imaging the hydrogeology of the Nicaragua margin with electromagnetic methods General Amphibious Array Science
Haiying Gao Offshore Structure of the Cascadia Subduction Zone from Full-wave Tomography Cascadia Science
Yen Joe Tan Tidal triggering of earthquakes in the Alaska-Aleutian subduction zone Cascadia Science
Roy Hyndman The Arctic Beaufort Sea Alaska, Yukon, NWT margin Cascadia Science
Spahr  Webb Lessons from the Cascadia Deployment Cascadia Science
Miles Bodmer SKS shear-wave splitting observations from the first two years of Cascadia Initiative OBS data. Cascadia Science
Yang Zha Variation of crustal structure along the Eastern Lau back-arc Spreading Center constrained by seafloor compliance General Amphibious Array Science
Zhao Chen Microseism Source Direction in Cascadia Using Cross-correlation and Array Coherence Cascadia Science
Koichiro Obana SeaJade Earthquake Observations in Cascadia Subduction Zone off Vancouver Island Cascadia Science
Takashi Tonegawa Shear wave anisotropy within marine sediments in the Cascadia subduction zone derived from Ps converted waves Cascadia Science
Aaron Wech Amphibious tremor observations General Amphibious Array Science
Helen Janiszewski Imaging the downgoing Juan de Fuca crust using receiver functions from the Cascadia Initiative Cascadia Science
Songqiao Wei Seismic Attenuation Structure of the Lau Back-arc Basin from a Local Amphibious Array General Amphibious Array Science
Jesse Hutchinson Results and analysis from the SeaJade oceanic array of the Casacdia fore-arc Cascadia Science
Daniel Bowden Ambient Noise Tomography with the ALBACORE OBS Array General Amphibious Array Science
Allen Husker Subduction in Mexico Future Array Targets
Joseph Byrnes Structure of the Lithosphere-Asthenosphere System Beneath the Juan de Fuca Plate: Results of Body Wave Imaging Using Cascadia Initiative Data Cascadia Science
Weisen Shen Directionality of ambient noise on the Juan de Fuca Plate: Implications for source locations of the primary and secondary microseisms Cascadia Science
Samuel Bell Comparison of Long-Period Noise on Vertical Component OBS Records from Cascadia Cascadia Science
Aubreya Adams Seismic structure of the Tonga Arc and Lau Backarc Spreading Center from joint inversion of local and teleseismic body wave arrivals recorded on OBS and land-based stations General Amphibious Array Science

Amphibious Array Facility Workshop Whitepapers

Submitted By View Whitepaper Category Download
Vadim Levin amparray_in_novascotia.pdf Looking Ahead
Peter Haeussler megathrust_obs_white_paper2.pdf Looking Ahead
Jessica Lodewyk aaf_cascadia_white_paper_10_01_14.pdf Retrospective
Roy Hyndman amphibious_array_arctic_beaufort_sea_royoct7.pdf Looking Ahead
Paul Bodin uw_whitepaper_for_aaf.pdf Looking Ahead
Aaron Wech wech_etal.pdf Looking Ahead
William Wilcock aaf_futureworkshop_whale.pdf Looking Ahead
William Wilcock aaf_futureworkshop_future2.pdf Looking Ahead
Jake Walter gasz_whitepaper_v3.pdf Looking Ahead

The webinar registration period for this workshop closed at .

Last Name First Name Institution
Abers Geoff Cornell University
Adams Aubreya Washington University in St. Louis
Aderhold Kasey Boston University
Allen Richard UC Berkeley
Anderson Greg National Science Foundation
Anderson Kent IRIS
Arnoux Gillean University of Oregon
Arrowsmith Ramon Arizona State University
Babcock Jeff Scripps Institution of Oceanography
Bangs Nathan University of Texas, UTIG
Barclay Andrew LDEO
Bell Samuel Brown University
Bilek Susan New Mexico Tech
blackman donna NSF / SIO
Bodin Paul University of Washington
Bodmer Miles University of Oregon
Bowden Daniel Caltech
Busby Robert IRIS Transportable Array
Byrnes Joseph University of Oregon
Cai Hongzhu University of Utah
Chen Xiaowei Woods Hole Oceanographic Institution
Chen Zhao Scripps Institution of Oceanography
Christeson Gail UTIG
Colella Harmony Arizona State University
Collins John Woods Hole Oceanographic Institution
Detrick Bob IRIS
Evans Rob WHOI
Evers Brent IRIS - OBSIP
Forsyth Donald Brown University
Franke Mathias Kinemetrics, Inc.
Frassetto Andrew IRIS
Freymueller Jeff University of Alaska Fairbanks
Gaherty James Lamont-Doherty Earth Observatory
Gao Haiying UMASS Amherst
Gomberg Joan US Geological Survey
Gulick Sean University of Texas at Austin
Haeussler Peter U.S. Geological Survey
Hicks Stephen University of Liverpool
Houston Heidi University of Washington
Huang Hsin-Hua University of Utah / Caltech
Husker Allen UNAM
Hutchinson Jesse University of Victoria
Hyndman Roy Pacific Geoscience Centre, Geol. Survey Canada
Janiszewski Helen Columbia University, LDEO
Kawakatsu Hitoshi ERI
Key Kerry Scripps Institution of Oceanography
Kodaira Shuichi JAMSTEC
Laske Gabi IGPP-SIO
Levin Vadim Rutgers University
Lin Fan-Chi University of Utah
Liu Yuanyuan Stony Brook University
Lodewyk Jessica IRIS
Mieres Madrid Jose Antonio Universidad de Chile
Morgan Julia Rice University
Morton Emily New Mexico Tech
mousavi seyed mostafa University of Memphis
Nabelek John Oregon State University
Naif Samer Scripps Institution of Oceanography
Nooner Scott UNCW
Obana Koichiro JAMSTEC
Rathnayaka Sampath California State University, Northridge
Roland Emily University of Washington, School of Oceanography
Schwartz Susan UC Santa Cruz
Shen Weisen University of Colorado Boulder
Shillington Donna Lamont-Doherty Earth Observatory
Singh Ramesh Chapman University
Tan Yen Joe Columbia University
Todd Erin UC Santa Cruz
Tolstoy Maya Lamont-Doherty Earth Observatory of Columbia University
Tonegawa Takashi JAMSTEC
Toomey Douglas University of Oregon
Trehu Anne Oregon State University
van Keken Peter University of Michigan
Vanacore Elizabeth PRSN @ UPR-Mayagüez
Vernon Frank UCSD
Wade Jennifer National Science Foundation
Walter Jake Institute for Geophysics, University of Texas at Austin
Webb Spahr LDEO
Wech Aaron US Geological Survey
Weeraratne Dayanthie California State University, Northridge
Wei Songqiao Washington University in St. Louis
Wiens Douglas Washington University in St Louis
Wilcock William University of Washington
Woodward Robert IRIS
Zha Yang LDEO, Columbia University

The scholarship application period for this workshop closed at .

Important Dates

  • Registration open:
    Thu, July 24, 2014
  • Registration deadline:
    Tue, September 30, 2014
  • Whitepaper Submissions open:
    Thu, July 24, 2014
  • Whitepaper Submissions deadline:
    Tue, September 16, 2014
  • Abstract Submissions open:
    Thu, July 24, 2014
  • Abstract Submissions deadline:
    Tue, September 30, 2014

Workshop Location
Snowbird Resort