This page provides news announcements and data updates related to the GeoPRISMS Data Portal. Please visit the MGDS News page for general MGDS news announcements and updates.
An updated East African Rift System geodetic velocity field (2016.0a) compiled from continuous and survey mode GPS networks was contributed by Bob King, Michael Floyd, Rob Reilinger, and Becky Bendick. Containing data obtained between 1994 and December 2015, the data set is part of a wider Africa/Arabia/Eurasia velocity field derivation. The velocity field is also in GeoMapApp under Focus Sites.
Added to GeoMapApp are the spectrally-averaged global subduction zone residual bathymetry and gravity from Bassett and Watts (2015); updated Earthquake Focal Mechanism Solutions (CMT); and, EarthScope PBO Plate Velocities PBO Plate Velocities.
McCrory et al. (2006) Cascadia margin depth to the Juan de Fuca subducting slab added to GeoMapApp along with updated geological maps for the western US and updated Earthquake Focal Mechanism Solutions (CMT). MIDAS North America geodetic velocity median spatial filtered data from UNR-NGL also added.
Seismic Tomography models added to GeoMapApp for the Cascadia primary site: S-wave velocities for the US Pacific Northwest (PNW10-S, Porritt et al., 2011) and for North America (NA07, Bedle and van der Lee, (2009) and SAWum-NA2, Yuan and Romanowicz, (2011)). EarthChem geochemistry data tables updated for all GeoPRISMS and MARGINS focus sites in GeoMapApp.
Basic field program details added for the ENAM MGL1514 active-source magneto-telluric/electromagnetic (MT/EM) experiment to map the presence and extent of freshwater in shelf sediments (PIs Kerry Key, Rob Evans). An updated USGS bathymetric compilation of the ENAM margin (version 2, 2016) was added to GeoMapApp. Seismic tomography models for the Western US crustal thickness (Gilbert, 2012) and for the DNA13 P- and S-wave velocity perturbations (Porritt et al., 2014) also are now available in GeoMapApp.
Zircon U-Pb geochronology data set added for submerged and terrestrial Gulf of California continental crust rock samples (PIs David Kimbrough, Marty Grove, Peter Lonsdale).
Added to GeoMapApp, under Focus Sites are depth slices showing Cascadia region shear wave velocity (Vs) from the full-wave ambient noise tomographic model of Gao and Shen (2014).
Basic field program details were added for the Mid-Atlantic Geophysical Integrative Collaboration ("MAGIC") seismometer network on the ENAM margin (PIs Maureen Long, Maggie Benoit, Eric Kirby, and Scott King). The seismic station locations were also added to GeoMapApp, under the Focus Sites menu. Sediment geochemistry data is now available for the Cascadia, Alaska, and New Zealand margins as part of Neal Blair's organic carbon project.
Information added about the summer 2015 Okmok Island (Aleutians) shoreline-crossing field program led by Ninfa Bennington and Kerry Key, including onshore and offshore MT instrument operations and the on-land seismic broadband array deployment (Aleutians_Bennington, TN324, SKQ201508S). The MT and seismic instrument stations were aldo added to GeoMapApp, under the Focus Sites menu.
Processed heat flow data and multi-channel seismic reflection data added for the 2015 Hikurangi margin "STINGS" cruise RR1508 (PIs Robert Harris, Anne Trehu, Stuart Henrys, and Andy Fisher). For the central ENAM margin, bathymetry and backscatter grids from a US Extended Continental Shelf survey are now available (from Brian Calder's Langseth cruise MGL1512).
High-resolution airborne LiDAR land elevation data sets (horizontal grid spacing ~3m) added to GeoMapApp for Cascadia region sites Mount Ranier, Mount St. Helens, Mount Hood, Three Sisters, Mount Bachelor, Crater Lake, and Mount Shasta (available under both the Focus Sites and the Data Layers menus). Also, cruise information was added for the New Zealand Hikurangi margin "HOBITTS" expedition RR1509 led by PIs Laura Wallace, Susan Schwartz, Anne Sheehan, and Spahr Webb.
Basic survey details added for Langseth multi-channel seismics cruise MGL1506 (led by co-chief scientists Deb Hutchinson, Warren Wood, and Nate Miller) that continued the US Extended Continental Shelf seismic surveying of the ENAM passive margin. Information is also now available for the New Jersey margin 3-D MCS Langseth cruise MGL1510 (PIs Greg Mountain, Craig Fulthorpe, Mladen Nedimovic, and Jamie Austin). For the New Zealand Hikurangi margin primary site, information was added for the summer 2015 "STINGS" Revelle cruise RR1508 (PIs Robert Harris, Anne Trehu, Stuart Henrys, and Andy Fisher) in which an international collaboration of scientists collected heat flow and seismics data to help understand the region's thermal structure. Raw swath multibeam bathymetry data was added for Paul Johnson's 2005 Cascadia cruise TN177.
Information and links to data were added for Kyle Straub's GeoPRISMS-funded sediment tank modelling experiments related to the stratigraphic architecture and geomorphological dynamics of passive margins.
More than 400 publication citations were added to the GeoPRISMS bibliographic database in preparation for the GeoPRISMS program mid-term review. The portal team also helped generate material for the review documentation.
EM300 bathymetry grids for Aleutian arc cruise TN182 (Gene Yogodzindski, Scott White) were contributed, and added to GeoMapApp under the Focus Site menu. Basic information and transponder locations for Dave Chadwell's seafloor geodesy project were also added. Cascadia processed heat flow data from thermal blanket devices added for cruise AT26-04 (Paul Johnson, Evan Solomon, Rob Harris). Also for the Cascadia Primary Site, MT instrument locations received from Adam Schultz for the multi-PI iMUSH project.
Cascadia long-probe processed heat flow data from cruise AT26-04 (Rob Harris) was contributed. OBS recovery and deployment information for remaining 2014 Cascadia Initiative operations added: OC1405A (John Collins), OC1405B (Matt Fowler), TN312 (Richard Alley, Maya Tolstoy), OC1407A (William Wilcock, Matt Fowler), OC1407B (John Nabelek, Jochen Braunmiller), and OC1409A (Anne Trehu, Dean Livelybrooks). OBS station tables in GeoMapApp also updated. Lastly, a database representative attended the GeoPRISMS Steering and Oversight Committee meeting.
A preliminary East African Rift System geodetic velocity field compiled from continuous and survey mode GPS networks was contributed by Bob King, Michael Floyd, Rob Reilinger, and Becky Bendick. Containing data obtained between 1994-2013, the data set is part of a wider Africa/Arabia/Eurasia velocity field derivation. The velocity field is also in GeoMapApp under Focus Sites.
Field information on the multiple components of the autumn 2014 ENAM Community Seismic Experiment is now available, and tied under one web page for the umbrella project, ENAM_CSE: Broadband OBS long-term deployments (EN537, Jim Gaherty, Lara Wagner); Short-period OBS instruments deployed during MGL1408airgun shooting (EN546, Harm van Avendonk, Brandon Dugan); Outer Banks broadband seismometer long-term deployments (Jim Gaherty); On-land short-period seismometers deployed during airgun shooting. The information is also in GeoMapApp under Focus Sites.
For Cascadia heat flow cruise AT26-04 (Paul Johnson, Evan Solomon, Rob Harris), station information added for the long and short heat flow probes, thermal blankets, Mosquito flow meters, diffusivity probes, and temperature mooring. Also for the Cascadia region, now available from PIs William Wilcock, Emilie Hooft Toomey, and Doug Toomey is an earthquake microseismicity catalog for the years 2003-2006 at the Juan de Fuca Endeavour segment as well as a seismic velocity model for the area.
Basic information added for Cascadia Initiative 2014 field season cruises OC1405A (John Collins), TN312 (Maya Tolstoy, Richard Alley), OC1407A (William Wilcock, Matt Fowler), and OC1407B (John Nabelek, Jochen Braunmiller).
Basic cruise information and multi-channel seismic data added for the GeoPRISMS ENAM Community Seismic Experiment MGL1408 (Donna Shillington, Anne Becel, Matt Hornbach) and for MGL1407 (USGS Extended Continental Shelf survey, Deb Hutchinson and Nate Miller).
Processed bathymetric grids from two Thompson cruises that surveyed the shelf and slope offshore Cascadia were contributed by investigator Paul Johnson (cruises TN177 and TN207). Basic cruise information and multi-channel seismic data added for the ENAM-area MGL1405 New Jersey Shelf-Slope 3-D survey (Greg Mountain, Mladen nedimovic, Craig Fulthorpe, Jamie Austin).
Station information for the two-year passive seismometer array deployment of the Cascadia iMUSH multi-institution program (lead PI Ken Creager) is now available and can be accessed in GeoMapApp through the Focus Site menu along with updated EarthScope PBO station tables for Alaska, Cascadia, and ENAM. Also for the ENAM region, the Calais et al. (2006) geodetic vertical velocity data for North America was added to GeoMapApp in both gridded and tabular format.
Coverage gaps in the GMRT base map for GeoPRISMS primary sites were compared to track lines of upcoming cruises and transits. Chief scientists were invited to help fill the gaps.
Version 2.6 of the GMRT multi-resolution topography synthesis was released. It includes swath data from seven cruises in the Cascadia region, two within the Alaska-Aleutians Primary Site, and four within the Eastern North American Margin area. The new release also incorporates the international EMODnet bathymetric compilation from 2013 that covers the Galicia Bank area - the conjugate margin to ENAM. Also this month, a GeoMapApp User survey was administered and responses received from GeoPRISMS investigators are helping to improve the application for the GeoPRISMS community.
Multichannel seismic field data files for the 1974 ENAM region IPOD line from Cape Hatteras to the Mid-Atlantic Ridge (cruise GS1974, John Grow and Rudi Markl) and for the EW0001 Canterbury Basin survey offshore New Zealand (Craig Fulthorpe, James Austin) are now available.
For the Cascadia region, project information and a link to the data is now available for the 3-D seismic velocity modelling work of Haiying Gao and Yang Shen.
Basic cruise and OBS recovery and deployment information can be viewed for the six Cascadia Initiative cruises of 2013: OC1305C (chief scientist Matt Fowler), OC1306A (Robert Dziak), AT26-02 (Anne Trehu and Dean Livelybrooks), OC1307C (William Wilcock and Doug Toomey), OC1308A (Emilie Hooft), OC1308B (Jeff McGuire and Susan Schwartz).
Version 2.5 of the GMRT multi-resolution bathymetry synthesis was released. It includes swath data from six cruises in the Cascadia region, including the summer 2013 GeoPRISMS-funded Cascadia heat flow cruise AT26-04 (chief scientist Paul Johnson). Also for that AT26-04 cruise, CTD water column data is now available.
Basic information and open access data for Cascadia heatflow and sediment coring cruise AT26-04 (chief scientist Paul Johnson) is now available.
For the Galicia margin off the west coast of Spain and Portugal, the conjugate to ENAM, a database record was created for the summer 2013 Langseth 3-D MCS seismic survey, MGL1307 (chief scientists Dale Sawyer, Donna Shillington, Tim Reston, Cesar Ranero, Juli Morgan).
A GeoMapApp webinar focussed upon GeoPRISMS-related data saw participation from 27 real-time webinar attendees from across the nation. The webinar was recorded and placed on-line. The new-look GMRT MapTool now offers enhanced functionality with pre-set menu links for each of the GeoPRISMS primary sites. The IEDA Policy and User Committees met at Lamont, with Susan Schwartz representing the GeoPRISMS community.
For the GeoPRISMS bibliography many Cascadia-related references added and linked to data sets. The number of articles in the bibiliography now exceeds 700.
Overarching portal pages for the Pacific Northwest Seismic Network and EarthScope USArray seismometer arrays now provide quick access to seismic data archived at IRIS, along with links to many publications. Also pointing to IRIS, the new portal page for the Cascadia Initiative additionaly links users to PBO geodesy data archived at UNAVCO.
Version 2.4 of the GMRT multi-resolution topography synthesis was released. It includes 11 additional multibeam bathymetry surveys in the Cascadia area and is helping with Cascadia Initiative OBS operations. The GMRT base map is used in GeoMapApp and other IEDA data resources.
Basic field program information is available for Cascadia:Abers and Cascadia:Trehu - the summer 2012 Cascadia Ridge2Trench Add-On projects in which seismometers deployed in Washington and Oregon recorded airgun signals during Langseth's offshore seismic shoots. An outline web page has been created for the large-scale, inter-disciplinary, multi-institution iMUSH (Imaging Magma Under St. Helens, lead PI Ken Creager) project for which fieldwork will get underway this summer.
Database representative attended the GeoPRISMS Steering and Oversight Committee meeting. The Search For Data function was refined for each primary site. In GeoMapApp, the EarthScope USArray station tables and the EarthChem geochemistry data tables were updated.
Basic field program information and links to data for Geoff Abers' BEAAR and MOOS Alaska seismic experiments added to the database. On the Related Links section of the GeoPRISMS data portal, new links to related data have been posted.
The GeoPRISMS bibliography now contains all references from the GeoPRISMS Science Plan, bringing the total citations to more than 600. Many are linked to associated data sets and field program information. The bibliography can be searched using a number of filter parameters including name of primary site, paper title, author, year, and journal, and can be exported in EndNote format.
For the Cascadia region, now available is information about OBS and CTD operations for Cascadia Initiative Year 2, leg 3 New Horizon OBS recovery cruise NH1206 (chief scientist Robert Dziak), and Year 2, legs 5 and 6 R/V Oceanus OBS deployment cruises OC1208B (chief scientists Doug Toomey and Susan Schwartz) and OC1209A (chief scientists Anne Trehu and Jeff McGuire). OBS location information for Year 1 (surveyed-in), Year 2 (best locations available) and the Years 3 and 4 planned instrument locations can now be accessed in GeoMapApp through the Focus Site menu. Also for the Cascadia region, a basic web page was created for the Moore-Cochrane-Trehu 1989 MCS cruise GT8909 onboard Digicon's seismic MCS acquisition vessel GeoTide.
The Law of the Sea bathymetry and backscatter grids collected during the summer 2012 ENAM cruise RB1202 (chief scientists Armstrong, Calder, Gardner, Johnson) over the Cape Fear slide and Hatteras Transverse canyon system are now available in GeoMapApp via the Focus Sites menu.
Database representatives attended the GeoPRISMS mini-workshop at AGU on Marine Geophysics in the Cascadia Primary Site, and the GeoPRISMS community AGU townhall event.
Database representative attended the GeoPRISMS Steering and Oversight Committee meeting. For the Cascadia Langseth-Oceanus summer 2012 two-ship MCS/OBS experiment, details of surveyed-in OBS deployments added to database. Also for the Cascadia primary site, links added to Year One Cascadia Initiative OBS data archived at IRIS.
For a Juan de Fuca plate two-ship seismic experiment, basic program information is now available for the OBS tending cruise OC1206A (chief scientists Pablo Canales and Helene Carton). Database personnel attended the GeoPRISMS East African Rift System workshop and ran there a hands-on workshop covering data resources.
Basic program information now available for Law of the Sea cruise RB1202 (chief scientists Armstrong, Calder, Gardner, Johnson) which continued the multibeam mapping of the ENAM area by imaging both the Cape Fear slide and Hatteras Transverse canyon system. In the Cascadia region, basic information about OBS deployments and CTD operations is provided for the Cascadia Initiative Year 2, leg 4 cruise on R/V Oceanus - OC1208A (chief scientists Emilie Hooft and William Wilcock). For the Alaska-Aleutians primary site, tables listing the seismometer instrument locations from the 1999-2001 BEAAR and 2006-2009 MOOS on-land seismology experiments (PIs Abers, Freymueller, Christensen, Hansen) can be viewed in GeoMapApp (through the Focus Site menu).
Also for the Cascadia Initiative, basic information is now available for the summer's Cascadia seismics cruises. With a two-ship experiment, cruise MGL1211 (chief scientist Suzanne Carbotte) shot 2-D MCS lines and to OBSs as part of a Juan de Fuca plate project. Additionally, shooting was done to near-shore OBSs and on-land seismometers deployed for a crossing-the-shoreline experiment (PIs Geoff Abers, Anne Trehu, Helen Carton). On NSF RAPID-funded cruise MGL1212 (chief scientists Steve Holbrook, Graham Kent, Katie Keranen), 2-D MCS lines were acquired under an open data access policy to help refine the location of a future 3-D seismic survey.
For the Cascadia Initiative, information on Year 2, leg 2 OBS deployment/recovery cruise TN283 (chief scientists Maya Tolstoy and Richard Allen) has been added. Information about two other legs that only recovered Year 1 OBSs is also now available. Cruise TN268 (chief scientist John Delaney) answered a call to pick up mis-located OBS FN4B. Year 2 Oceanus leg OC1205A, under chief scientist John Collins, recovered 23 OBSs.
Basic information available for the on-going Cascadia PANGA geodetic project, with links to GPS and tiltmeter stations and data.
Database personnel attended the EarthScope-GeoPRISMS Cascadia implementation workshop and ran there a hands-on workshop covering data resources.
Database representative attended the GeoPRISMS Steering and Oversight Committee meeting.
Sub-bottom and water column data now available for Alaska-Aleutians Megathrust cruise MGL1110 (PIs Donna Shillington, Mladen Nedimovic, Spahr Webb) . Basic field information added for Aleutians-Bering Sea USGS Extended Continental Shelf MCS-OBS survey MGL1111 (PIs Ginger Barth, Warren Wood, Jon Childs), with links to IRIS for OBS data .
New electronic metadata forms are now available for cataloging land and marine field programs. They capture basic information about the field program, including instruments used and types of data collected. Information on registering and cataloging samples is also contained in the forms.
In GeoMapApp, under the Focus Sites menu, data sets and instrument array information can be loaded for the Cascadia, Alaska and ENAM primary sites. Examples include, for Cascadia, the Cascadia Initiative Year 1 OBS deployments, the joint Japan-Canada-US SeaJade OBS array, Neptune Canada cabled seismometer stations, and EarthChem geochemistry data. Various high-resolution bathymetry and backscatter grids for all three primary sites can also be loaded and manipulated. Short step-by-step GeoMapApp video tutorials can now be viewed on YouTube.
For the first phase of Cascadia Initiative OBS deployments, field program information for the summer 2011 Leg 1 deployment cruise W1107A (Chief scientists Maya Tolstoy and Anne Trehu) is now available. Database representative attended the GeoPRISMS Steering and Oversight Committee meeting.
Database representative attended the GeoPRISMS-EarthScope ENAM Workshop to highlight the GeoPRISMS data portal and resources.
Field program information for the summer 2011 Alaska-Aleutians Megathrust MCS survey MGL1110 (PIs Donna Shillington, Mladen Nedimovic, Spahr Webb) is now available. Database representative attended the GeoPRISMS-EarthScope Alaska Implementation Workshop to highlight the GeoPRISMS data portal and resources.
Basic information on Gulf of Alaska MCS cruise, MGL1109 (PI Jonathan Childs, chief scientists Ginger Barth and Sean Gulick), now available. For the Cascadia primary site, a multibeam mapping survey was recently conducted onboard R/V Thompson (cruise TN265, chief scientists Chris Goldfinger and Chris Romsos). Basic details of the survey are now available. The high-resolution bathymetry data will be used to aid the deployment of OBS instruments as part of the NSF Cascadia Facility.
In recognition of World Oceans Day on June 8, the Global Multi-Resolution Topography Synthesis was published in Google Earth. Along with this publication, two Google Tours were released highlighting Seafloor Features and Ridge 2000 Science. The GMRT Synthesis would not be possible without the contributions of hundreds of scientists whose data has been made publicly available. The full GMRT attribution layer which provides links to source data can also be downloaded as a kmz file from the Google Earth Gallery.
Database representatives attended the GeoPRISMS Steering and Oversight Committee meeting to discuss overarching data policy issues as well as progress on creating a GeoPRISMS data portal.
GeoPRISMS Subduction Cycles and Deformation (SCD) implementation workshop takes place. Three potential Primary Sites identified for study: Alaska-Aleutians, Cascadia, New Zealand.
Database work begins with the creation of a GeoPRISMS data portal.
GeoPRISMS Rift Initiation and Evolution (RIE) implementation workshop takes place. Two Primary Sites identified for study: East African Rift System and north Atlantic margin.