Latest News

This leg is completed.  The following links provide detailed information:

• One page summary
• Cruise Report
• Excel Spread Sheet of OBS Deployment Sites

Chief Scientists: Maya Tolstoy (LDEO), Anne Trehu (OSU)
Ports: Newport-Newport

The first deployment leg of the Cascadia Initiative will deploy 20 ocean bottom seismometers in shallow water (<1000 m) along the Cascadia margin. The primary deployment area will be the Northern Focussed Array off of Grays Harbor, WA. All 20 OBS will be installed in trawl-resistant mounts (TRMs) and will be deployed via the ship’s wire and recovered using a Remotely-Operated Vehicle (ROV). All 20 OBSs will be equipped with Nanometrics Trillium Compact seismometers. In addition to the seismometers, the OBSs will be equipped with Absolute Pressure Gauges (APGs).

It is anticipated that this expedition will NOT enter Canadian waters and a foreign vessel clearance form is not being requested.

Pre-cruise related Discussions

Outstanding Issues (see each page for comments/discussion)

• Fine-tuning deployment sites for the Northern Focussed Array off of Grays Harbor
  • How are we going to do this?
  • Moderator: Jeff McGuire
• Existing bathymetry for Northern FA
  • What is available?
  • Moderator: Maya Tolstoy
• Trawling in the vicinity of the Northern FA
  • Who is going to investigate this issue?
  • Moderator: Anne Trehu
• Timing of FA deployment period with regards to potential Langseth Operations.
  • Should the northern FA record the 3D Langseth shoot, if it occurs. The shoot will last ~40 days.
  • Moderator: Doug Toomey
• Others?