Cascadia Initiative Data Highlights

The Cascadia Initiative data are open to the public.  Data and metadata can be found at the IRISOBSIP and CIET sites.  This page provides a number of useful links that will help users find and use the Cascadia Initiative data.

Cascadia Initiative OBS Data Availalbe at the IRIS DMC

Ocean bottom seismometer (OBS) data from the Year 1 (2011-2012) and Year 2 (2012-2013) deployments of the Cascadia Initiative are now available at the IRIS DMC.  Additional data from the Year 1 and Year 2 deployments will be uploaded as they become available.

If you use CI data, please include the following citation:


Toomey, D.R., R.M. Allen, A.H. Barclay, S.W. Bell, P.D. Bromirski, R.L. Carlson, X. Chen, J.A. Collins, R.P. Dziak, B. Evers, D.W. Forsyth, P. Gerstoft, E.E.E. Hooft, D. Livelybrooks, J.A. Lodewyk, D.S. Luther, J.J. McGuire, S.Y. Schwartz, M. Tolstoy, A.M. Tréhu, M. Weirathmueller, and W.S.D. Wilcock. 2014. The Cascadia Initiative: A sea change in seismological studies of subduction zones. Oceanography 27(2):138–150


Data availability can be viewed at the IRIS DMC MetaData Aggregator.

A summary of data availability is provided by OBSIP:

Relevant Virtual Network codes are as follows:

  • _CASCADIA_OBS:  NSF Cascadia Initiative Offshore/OBS data
  • _CASCADIA-TA:  NSF Cascadia Initiative, Earthscope TA
  • _CASCADIA:  NSF Cascadia Initiative, Earthscope TA plus Regional Network Stations

Cascadia Initiative Metadata

The following links to CI metadata are provided by OBSIP and CIET.

Summary of Data Availability at the DMC

​Orientation of OBS Horizontal Channels

The orientation of horizontal channels for the Year 1 data has been determined by personnel at OBSIP.  The report and its appendicies can be downloaded from the OBSIP web site.  Links provided below:

Metadata for each OBS Group

Ocean bottom seismometers typically include a 3 component seismometer and a pressure gauge. In some instances, these channels are recorded at multiple sampling rates and some OBSs include additional channels, for example, hydrophones or accelerometers.  For these reasons, a single OBS can often report more then 4 channels of data.

Furthermore, for reasons of national security the OBS data are vetted by the U.S. Navy.  The NSF and the U.S. Navy have signed a memorandum of agreement on ocean observing system security.

  • Standard Operating Procedures for Security Issues Posed by Ocean Bottom Seismometers (Annex B final.pdf)

Below we provide a description of recorded channels; the descriptions are separated out by OBS group.

CIET Cruise Reports

Cruise reports from the 2011, 2012 and 2013 expeditions are available on the CIET web site and as metadata at the IRIS DMC.  Cruise reports provide tables, plots and narratives of operations, which can be useful in evaluating data quality.

2011 Field Season

2011 Expeditions

2012 Field Season

2012 Expeditions

Cascadia Initiative Station Files

CIET maintians a set of Excel spreadsheets of deployed and planned stations for each of the 4 years of the Cascadia Initiative.  The spreadsheets provide site names, deployment positions, deployment periods and include comments on our initial estimate of data quality:
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