Year: 2014

A workshop on “Feedbacks and coupling among surface processes, climate and tectonics during mountain building” will be held in Taipei Taiwan from June 1 to June 8th, 2015.

The workshop will include 3 days of meeting and 2 to 3 days of field trips.

A townhall is organized at AGU to discuss the workshop:
Wednesday 17, 6 to 8pm
Westin Market Street
50 3rd street (near corner with Market Str.)
Stanford room on the 3rd floor

All are invited.

Tim (tim.byrne@uconn.edu)

Jian-Cheng Lee (jclee@earth.sinica.edu.tw)
US Organizing Committee:
Tim Byrne
Jean Crespi
Eric Kirby
Brian Yanites
Francis Wu

Join us for the GeoPRISMS Townhall Meeting and Community / Student Forum at the 2014 AGU Fall Meeting!

When: AGU Fall Meeting 2014 – Monday December 15 at 6:00 PM

Where: Westin Market Street San Francisco Hotel, 50 Third Street – Franciscan Ballroom

(between Mission and Market)

The event is open to all with interests in the GeoPRISMS Program and GeoPRISMS (or MARGINS) research. Come hear updates about the GeoPRISMS Program, the latest GeoPRISMS research projects & study areas, and ongoing GeoPRISMS research from student presenters.

* A short formal session (starting at 6:30pm) will include welcome opening remarks from the GeoPRISMS Chair Peter van Keken and updates from NSF Program Managers Jenn Wade and Donna Blackman.

* Andrew Goodwillie, from LDEO University of Columbia, will give a short presentation on the GeoPRISMS Data Portal and how it can help you find your data.

* Jeffrey Freymueller, from University of Alaska Fairbanks, will give an overview of GeoPRISMS Science in the Alaska and Aleutian Primary Site.

Student entrants for the GeoPRISMS Prize for Outstanding Student Presentations are also invited to display their AGU posters (or poster versions of their AGU talks) and discuss their research with event participants. This will be a great opportunity for students to share their results further and to interact with a wide spectrum of GeoPRISMS scientists.

There will be ample time to mingle, and refreshments will be available. Among those present will be Peter van Keken (GeoPRISMS Chair), members of the GeoPRISMS Steering and Oversight Committee, and Program Managers for GeoPRISMS from the National Science Foundation (NSF).

We hope to see you there.

The GeoPRISMS Office

More information about the the AGU Townhall, Student Prize Competition, Mini-Workshops, and GeoPRISMS-related sessions: /meetings/agu-townhall-and-student-forum/

Questions? Contact the GeoPRISMS Office: info@geoprisms.nineplanetsllc.com

Join us for the GeoPRISMS Townhall Meeting and Community / Student Forum at the 2014 AGU Fall Meeting!

When: AGU Fall Meeting 2014 – Monday December 15 at 6:00 PM

Where: Westin Market Street San Francisco Hotel, 50 Third Street – Franciscan Ballroom

(between Mission and Market)

The event is open to all with interests in the GeoPRISMS Program and GeoPRISMS (or MARGINS) research. Come hear updates about the GeoPRISMS Program, the latest GeoPRISMS research projects & study areas, and ongoing GeoPRISMS research from student presenters.

* A short formal session (starting at 6:30pm) will include welcome opening remarks from the GeoPRISMS Chair Peter van Keken and updates from NSF Program Managers Jenn Wade and Donna Blackman.

* Andrew Goodwillie, from LDEO University of Columbia, will give a short presentation on the GeoPRISMS Data Portal and how it can help you find your data.

* Jeffrey Freymueller, from University of Alaska Fairbanks, will give an overview of GeoPRISMS Science in the Alaska and Aleutian Primary Site.

Student entrants for the GeoPRISMS Prize for Outstanding Student Presentations are also invited to display their AGU posters (or poster versions of their AGU talks) and discuss their research with event participants. This will be a great opportunity for students to share their results further and to interact with a wide spectrum of GeoPRISMS scientists.

There will be ample time to mingle, and refreshments will be available. Among those present will be Peter van Keken (GeoPRISMS Chair), members of the GeoPRISMS Steering and Oversight Committee, and Program Managers for GeoPRISMS from the National Science Foundation (NSF).

We hope to see you there.

The GeoPRISMS Office

More information about the the AGU Townhall, Student Prize Competition, Mini-Workshops, and GeoPRISMS-related sessions: /meetings/agu-townhall-and-student-forum/

Questions? Contact the GeoPRISMS Office: info@geoprisms.nineplanetsllc.com

Please register for Imaging faulting and hydration in the Alaska subduction zone with the R/V Langseth on Dec 3, 2014 2:00 PM EST at:

https://attendee.gotowebinar.com/register/856323108167966721

Presenter: Donna Shillington, Lamont-Doherty Earth Observatory

Subduction zones worldwide exhibit remarkable variations in seismic activity and slip behavior along strike and down dip. Active-source seismic data can provide essential constraints on the properties of the plate boundary, the distribution of fluids and hydration, and deformation in the overriding and subducting plate, all of which can be used to assess possible contributions to this variability. Here I describe results from a marine active-source seismic study of the subduction zone offshore Alaska.

MCS reflection and wide-angle seismic data were collected offshore from the Alaska Peninsula in the summer of 2011 aboard the R/V Langseth during the Alaska Langseth Experiment to Understand the megaThrust (ALEUT) program. This region encompasses the full spectrum of coupling: 1) the weakly coupled Shumagin Gap; 2) the Semidi segment, which last ruptured in the 1938 M8.2 event, appears to be locked at present, and 3) the western Kodiak asperity, which marked the western extent of the 1964 M9.2 rupture and also appears to be locked. It also exhibits substantial variations in seismicity. ALEUT data reveal changes along-strike in incoming sediment thickness and plate structure and along-strike and downdip variations in megathrust reflection characteristics.

Remarkable variations in the style and amount of bending faulting and hydration in the subducting oceanic plate are observed along strike, which appear to be controlled by the local relationship between the orientations of pre-existing structures in the incoming oceanic plate and the subduction zone. Significantly more bending faulting and hydration are observed in the Shumagin Gap, where pre-existing structures are favorably aligned, than the Semidi segment. The thickness of sediment on the incoming plate also changes along strike. Over 1 km of sediment is observed on the incoming oceanic plate in the Semidi segment prior to subduction, and a relatively thick and continuous layer interpreted as subducted sediment can be imaged at the plate boundary here up to ~50 km from the trench. In the Shumagin Gap, where the incoming sediment section is half as thick and more pervasively faulted at the outer rise, a subducting sediment layer is also observed but it is thinner, less continuous and is not observed to continue as far from the trench. These changes in bending faulting, hydration and sediment thickness correlate with variations in interplate and intermediate depth intraslab seismicity. Although the Semidi segment is capable of producing great earthquakes, the comparatively thick sediment here may contribute to the relative paucity of interplate seismicity compared with adjacent segments. More intermediate depth seismicity is observed in the Shumagin Gap, where there is more hydration and bending faulting in the subducting plate.

Downdip variations in the characteristics of the plate boundary are also observed; a simple and bright reflection is generally observed at depths of ~12-25 km, ~40-100 km from the trench, within the center of the estimated locked zone. The character changes where the megathrust appears to intersect the forearc mantle wedge to a wide (~2 km thick), bright band of reflections and may arise from a change in deformation style, distribution of fluids, and/or plate boundary properties. Although the overall patterns in reflection characteristics are consistent between profiles across different segments, this transition in reflection characteristics occurs at larger distances from the trench within the Semidi segment than in the Shumagin Gap.

After registering, you will receive a confirmation email containing information about joining the webinar.

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Hello all,

The Cascadia Initiative Year 3 Horizontal Orientation Report has been published on the OBSIP website and published in the IRIS DMC metadata folder. The reports can be downloaded at:

http://www.obsip.org/experiments/experiment-list/2011/cascadia

Please note that “Appendix B: Helicorders” in the report will be uploaded at a later date.

For more information about Cascadia Initiative Data Updates and Changes, please visit the OBSIP website or join the OBSIPtec mailing list.

Website: http://www.obsip.org/experiments/experiment-list/2011/cascadia/cascadia-data-updates-and-changes

Mailing List: http://www.iris.washington.edu/mailman/listinfo/obsiptec

If you have any questions, please direct them to Jessica Lodewyk (Jessica.lodewyk@iris.edu)

Thank you,

Jessica Lodewyk

GeoMapApp is a free, map-based data discovery and analysis program that is widely-used across the geosciences for research and education. To update our users on new directions and to provide an opportunity for questions and suggestions, we invite people with experience of GeoMapApp to join us for a GeoMapApp Users’ Lunch at the Fall AGU meeting, on Thursday, 18th December.

Agenda:

– Summary of June 2014 GeoMapApp workshop and survey.

– What’s New.

– GeoMapApp menu restructuring.

– GeoMapApp forum, YouTube tutorials, help and other feedback mechanisms.

– Using GeoMapApp off-line.

– Open discussion: Your questions and feedback (e.g. potential improvements, missing functions).

Attendance:

– The lunch is designed for individuals with some experience using GeoMapApp in research or teaching.

– Graduate students, post-docs and faculty are encouraged to attend.

– Lunch will be provided for up to 20 people. Click here to apply (deadline is 4th December).

– Successful applicants will be notified on 5th December.

Event Time:

Thursday 18th December, 12:30-1:30pm, Marriott Marquis hotel (4th St and Mission, one block from the Moscone Center), Room Sierra I.

Please submit an application for the GeoMapApp Users’ Lunch by clicking here (deadline is 4th December). Successful applicants will be notified on 5th December. If you have questions about the lunch, please contact the IEDA-GeoMapApp team by sending e-mail to info@geomapapp.org

See you at AGU!

The IEDA-GeoMapApp Team

Lamont-Doherty Earth Observatory of Columbia University

GeoPRISMS Prize for Outstanding AGU Student Poster and Oral Presentations

Application deadline: November 21, 2014

The GeoPRISMS Program is offering two $500 prizes for Outstanding Student Presentations on GeoPRISMS- or MARGINS-related science at the AGU Fall Meeting in San Francisco, December 15-19, 2014. The two prizes, one each for a poster and an oral presentation, will be awarded to highlight the important role of student research in accomplishing MARGINS- and GeoPRISMS-related science goals, and to encourage cross-disciplinary input. Any student working on science topics related to the objectives of MARGINS or GeoPRISMS is eligible to participate. Students do not have to be working on a MARGINS- or GeoPRISMS-funded project to enter the competition. Students from the international community, as well as from the U.S., are encouraged to apply. Please note that previous GeoPRISMS Student Prize winners are not eligible.

Presentations will be judged throughout the AGU meeting. Students will also have an opportunity to display their posters (or poster versions of their AGU talks) at the GeoPRISMS Student and Community Forum, beginning at 6:00 pm, Monday, December 15th at the Westin Market Street Hotel (50 Third St., between Mission and Market).

GeoPRISMS Student Prize winners and honorable mentions will be notified after the AGU Fall Meeting and highlighted in the GeoPRISMS newsletter and website, and their host schools will be notified of their achievement. For more information and application visit the GeoPRISMS website at:

/meetings/agu-student-prize/

The GeoPRISMS Office

Questions? contact the GeoPRISMS office at info@geoprisms.nineplanetsllc.com

Whole-rock geochemical data for Quaternary Alaska volcanic rocks is now available here. This searchable database contains published whole-rock geochemical data for Quaternary volcanic rocks in Alaska, linked to geologist, publication, source volcano (where possible), and other sample and analysis metadata. The website interface allows users to query the database and return datasets as fully-documented .html or downloadable .csv tables.

Rather than a static publication, this database is intended to be updated as new volcano-related geochemical data is published. At present, the database contains analyses for more than 5,000 unique samples, making it a valuable research tool for geoscientists with interests ranging from volcano-specific processes to whole-arc data synthesis.

Please contact Cheryl Cameron (Cheryl.cameron@alaska.gov) or Seth Snedigar (seth.snedigar@alaska.gov) if you have further questions or comments about this dataset or the web interface.

Cameron, C.E., Snedigar, S.F., and Nye, C.J., 2014, Alaska Volcano Observatory Geochemical Database: Alaska Division of Geological & Geophysical Surveys Digital Data Series 8, https://www.avo.alaska.edu/geochem/index.php, doi:10.14509/29120