MARGINS SEIZE Workshop – The next decade of the Seismogenic Zone Experiment

Timberline Lodge, Mt. Hood, OregonSeptember 22 – 26, 2008

Workshop goals

• Review SEIZE accomplishments at the focus sites, Nankai and Costa Rica

(What are the remaining gaps, based on the original SEIZE Science Plan and in light of major new findings?)

• Review Non-Focus Site Science

(What are the critical issues that have not been addressed at the focus sites, and where should they be addressed?)

What are the major emerging scientific questions/directions for SEIZE?

Charges to break-out groups:

1) Are new facilities and/or technologies available or required to achievethese goals? If so, what are they?

2) Should SEIZE continue with the existing focus sites, develop new sites, or move away from focus sites and into more thematic based initiatives?

3) Why, if at all, does addressing the remaining and emerging science objectives of SEIZE require funding via a dedicated program rather than through NSF core funding?

4) What more can be done to develop the broader goals of societal relevance, such as outreach and education, geohazards (beyond seismic hazards), and developing international partnerships? In particular, are there communities and/or connections that should be targeted for increased participation in a future program (e.g. what scientific disciplines, educational programs, IODP community, etc.)?

What are the major emerging scientific questions/directions for SEIZE?

• Examine New Methods/Strategies

Discussion

• What are the remaining gaps, based on the original SEIZE Science Plan and in light of major new findings?

Tuesday AM• NanTroSEIZE review 20 MINUTE TALKS, 5 MINUTE QUESTIONS

• DISCUSSION - (What are the remaining gaps for Nankai, based on the original SEIZE Science Plan and in light of major new findings?)

Costa Rica review 20 MINUTE TALKS, 5 MINUTE QUESTIONS

DISCUSSION - (What are the remaining gaps for Costa Rica/Nankai, based on the original SEIZE Science Plan and in light of major new findings?)

Posters and Reception

Tuesday PMCosta Rica review 20 MINUTE TALKS, 5 MINUTE QUESTIONS

DISCUSSION - (What are the remaining gaps for Costa Rica/Nankai, based on the original SEIZE Science Plan and in light of major new findings?)

Posters and Reception

Wednesday AMNon-Focus Site review 20 MIINUTE TALKS, 5 MINUTES QUESTIONS

DISCUSSION - (What are the critical issues that have not been addressed at the focus sites, and where should they be addressed?)

Wednesday PMNew Methods/Strategies 25 MIN TALKS 5 MIN QUESTIONS

DISCUSSION (What are the major emerging scientific questions/directions for SEIZE?)

ThursdayNew Methods (cont.) 25 MIN TALKS, 5 MIN QUESTIONS

•DISCUSSION (Using SEIZE data in the classroom)

• Break-out Group Summaries and Discussion

- Break-out group summaries 30 MINUTES EACH

Final discussions

Tuesday AM• Introduction• 8:00 N. Bangs/G. Abers - Welcome/Goals of the Workshop

• 8:10 D. Smith (NSF) – NSF Update

• NanTroSEIZE review 20 MINUTE TALKS, 5 MINUTE QUESTIONS

• 8:20 H. Tobin - NanTroSEIZE: The IODP Nankai Trough Seismogenic Zone Experiment

• 8:35 G. Moore - Structural and stratigraphic setting of the NanTroSEIZE Kumano transect from 3D seismic data

• 9:00 H. Tobin - In situ properties, structure, and state of stress in the NanTroSEIZE transect: Logging While Drilling results from IODP Expedition 314

• 9:25 T. Byrne - Preliminary results from IODP Expedition 315, Nankai Trough

• 9:50 BREAK • 10:10 G. Kimura - Nankai Trough shallow splay and frontal thrust: IODP Expedition 316

• 10:35 D. Saffer - From the trench to the seismogenic zone: Establishing links between, fluid pressure, low-T metamorphism, and fault stability

• 10:50 Y. Ito - Very-low-frequency earthquake within accretionary prism along Nankai Trough

• 11:15-12:15 DISCUSSION - (What are the remaining gaps for Nankai, based on the original SEIZE Science Plan and in light of major new findings?)

Tuesday PMCosta Rica review 20 MINUTE TALKS, 5 MINUTE QUESTIONS

• 1:30 M. Protti - Seismicity reveals clear segmentation and differences in coupling along the Costa Rica subduction zone

• 1:55 K. McIntosh - Seismic reflection and refraction structure of the Middle America trench, Nicaragua and Costa Rica

• 2:20 A. Newman - Geodetic and seismic characteristics of the Middle America Trench: Focus on northern Costa Rica and Nicaragua

• 2:45 BREAK

• 3:05 P. LaFemina - Forearc motion and Cocos Ridge collision in Central America

• 3:30 R. Harris - The thermal structure of the Costa Rica margin along the Middle America trench

• 3:55 C. Ranero - Costa Rica seismogenesis project (CRISP), a complex drilling proposal at the IODP

• 4:20 – 6:00 DISCUSSION - (What are the remaining gaps for Costa Rica/Nankai, based on the original SEIZE Science Plan and in light of major new findings?)

• 7:30 – 9:00 Posters and Reception

Wednesday AMNon-Focus Site review 20 MIINUTE TALKS, 5 MINUTES QUESTIONS • 8:00 D. Fisher - Variations in shallow structure across the Sumatran Forearc based on

a high resolution single-channel seismic reflection survey

• 8:25 J.-P. Avouac - Interseismic stress build up, co-seismic stress release and afterslip on the Sumatra megathrust

• 8:50 C. Goldfinger - Plate boundary submarine paleoseismology

• 9:15 A. Trehu - Low angle thrust earthquakes in the "locked zone" beneath the central Cascadia continental margin

• 9:40 J.C. Moore - World’s thickest seismogenic fault rock from a subduction complex, Kodiak Islands, Alaska

• 10:05 BREAK

• 10:25 F. Chester - Mesoscopic scale structure in spot core from the San Andreas fault zone at SAFOD

• 10:50 S. Kirby - Great and giant subduction earthquakes and regional and transoceanic tsunamis that they spawn: Global trends, exceptions to the trends and geohazards implications

• 11:15-12:15 DISCUSSION - (What are the critical issues that have not been addressed at the focus sites, and where should they be addressed?)

Wednesday PMNew Methods/Strategies 25 MIN TALKS 5 MIN QUESTIONS

• 1:30 E. Davis - Using pressure as a proxy for strain: A review of ODP/IODP “CORK” technology and observations

• 2:00 K. Brown - Observatories, Costa Rica

• 2:30 E. Roeloffs - Borehole strainmeters: Instruments for measuring aseismic deformation in subduction zones

• 3:00 BREAK

• 3:20 D. Chadwell - Seafloor geodesy: Transitioning to continuous monitoring of plate motion in subduction zones

• 3:50 E. Araki - Development of cabled seafloor seismo-geodetic network and seafloor borehole observatories in the Nankai Trough

• 4:20-6:00 DISCUSSION (What are the major emerging scientific questions/directions for SEIZE?)

Charges to break-out groups:

1) Are new facilities and/or technologies available or required to achievethese goals? If so, what are they?

2) Should SEIZE continue with the existing focus sites, develop new sites, or move away from focus sites and into more thematic based initiatives?

3) Why, if at all, does addressing the remaining and emerging science objectives of SEIZE require funding via a dedicated program rather than through NSF core funding?

4) What more can be done to develop the broader goals of societal relevance, such as outreach and education, geohazards (beyond seismic hazards), and developing international partnerships? In particular, are there communities and/or connections that should be targeted for increased participation in a future program (e.g. what scientific disciplines, educational programs, IODP community, etc.)?

ThursdayNew Methods (cont.) 25 MIN TALKS, 5 MIN QUESTIONS

• 8:00 K. Wang - Observing a subduction-zone earthquake cycle within a decade

• 8:30 S. Schwartz - Slow slip- An ubiquitous yet poorly understood mode of strain release

• 9:00 C. Ammon - Broadband seismic imaging of large earthquake ruptures

• 9:30 Y. Liu - Role of fault dilatancy in subduction zone aseismic deformation transients

• 10:00 C. Marone - Mechanics of the seismogenic zone: Frictional properties and hydro- mechanical processes related to the updip transition from stable to unstable faulting

• 10:30 BREAK

• Education and Outreach• 10:50 D. Reed - Bringing MARGINS science to the Classroom – Examples from SEIZE

• 11:10 A Goodwillie - GeoMapApp database tools

• 11:45-12:15 DISCUSSION (Using SEIZE data in the classroom)

• Break-out Group Summaries and Discussion

• 1:30 FIVE-MINUTE PRESENTATIONS• 2:30 Break• 2:50 – 6:00 - Break-out group summaries 30 MINUTES EACH

Final discussions