Juan de Fuca

The Juan de Fuca OBS Experiment

Evolution and hydration of the Juan de Fuca crust and uppermost mantle: a plate-scale seismic investigation from ridge to trench 

PIs:

Suzanne Carbotte (LDEO)

Helene Carton (LDEO)

Mladen Nedimovic (LDEO)

 

 

 

Deployment of the Juan de Fuca experiment. Click image to go to interactive station map.

Experiment Summary

(Taken from the NSF Abstract Award #1029411): Subduction is a process in which oceanic crust and upper mantle are consumed beneath the margins of island arcs, such as Japan and Sumatra, or the margins of continents, as along the northwest coast of the U.S. Subducton gives rise to violent volcanic eruptions as well as great megathrust earthquakes and tsunamis. Dramatic demonstrations of the destructive effects of subduction have occurred recently in Indonesia, Japan, and Chile. Water released from the subducted plate is a significant, but poorly understood, contributor to these events; this seismic survey of the Juan de Fuca Plate has the specific aim of characterizing the plate from its formation at the ridge, through alteration and hydration of the plate as it ages, to subduction of the plate along the Cascadia margin. Owing to the very high risk of large earthquakes in Cascadia, improved understanding of the role of water in the subduction process is a primary broader impact of the survey. The project is also an important adjunct to the Cascadia Initiative, a multi-year deployment of instruments both onshore and offshore to study the structure and seismicity of the Cascadia region. 

Cruises

6/7/2012 - 7/4/2012

47 short period seismometers from SIO and WHOI were deployed.

7/5/2012 - 7/14/2012

Seismometers recovered. 

Scripps and Oregon State technicians deploy a short period instrument

Suzanne is a Senior Scientist at Lamont-Doherty Earth Observatory.  For additional information about Suzanne's research, go to her LDEO and professional website.  Additional Collaborators include:

  • J. Pablo Canales (Woods Hole Oceanographic Institution)
  • Helen Carton (Lamont-Doherty Earth Observatory)
  • Mladen Nedimovic (Dalhousie University)
  • Anne Trehu (Oregon State University)
  • Geoffrey Abers (Lamont-Doherty Earth Observatory)

OC1206A Cruise Report from the RV Oceanus OBS deployment and recovery cruise.

Description of the Juan de Fuca project science.

Juan de Fuca experiment OBS Metadata.

Cascadia in Motion

Data

Data from all OBSIP instruments deployed will be archived under temporary network code X6 at the IRIS DMC. Data will be restricted for two years following the experiment, per NSF policy.