Shear wave splitting intensity tomography and coupling with numerical flow models (with Rob van der Hilst,
Brad Hager, and Maarten de Hoop).
Here are some of my current research interests:
Shear wave splitting intensity tomography and coupling with numerical flow models (with Rob van der Hilst,
Brad Hager, and Maarten de Hoop).
Papers and meeting presentations:
Maureen D. Long , Maarten V. de Hoop, and Rob D. van der Hilst, 2008. Wave-equation shear wave splitting tomography. Geophysical Journal International, 172, 311-330. .pdf
Maureen D. Long , Maarten V. de Hoop, Rob D. van der Hilst, and Bradford H. Hager, 2007. Shear wave splitting intensity tomography beneath southwestern Japan and coupling with numerical flow models. In preparation for submission to Geophysical Journal International.
Maureen D. Long , Maarten V. de Hoop, Rob D. van der Hilst, and Bradford H. Hager. Shear wave splitting intensity tomography: theory, application, and coupling with geodynamical models. AGU Fall Meeting, 2006.
Maureen D. Long, Maarten V. de Hoop, Rob D. van der Hilst, and Bradford H. Hager. Shear wave splitting intensity tomography beneath southwestern Japan and coupling with geodynamical models. AGU Fall Meeting, 2007 (invited talk).
Papers and meeting presentations:
Amanda Klaus*, Lara Wagner, Maureen D. Long , and David James. Shear wave splitting and seismic anisotropy in Oregon's High Lava Plains. AGU Fall Meeting, 2007. (*Undergraduate intern, Summer 2007)
Papers and meeting presentations:
Maureen D. Long and Paul G. Silver. The subduction zone flow field from seismic anisotropy: A global view. Science, 319, 315-318. link to paper
Maureen D. Long and Paul G. Silver. What controls seismic anisotropy in subduction zones? In preparation for submission to Journal of Geophysical Research, 2008.
Maureen D. Long and Paul G. Silver. The subduction zone flow field from seismic anisotropy: A global view. AGU Fall Meeting, 2007.
Paul G. Silver and Maureen D. Long . The subduction flow field and seismic anisotropy: A global survey. Subduction Zone Geodynamics Conference, Montpellier, France, 2007.
Papers and meeting presentations:
Erik A. Kneller, Maureen D. Long, and Peter E. van Keken, 2008. Olivine fabric transitions and shear-wave anisotropy in the Ryukyu subduction system. Earth and Planetary Science Letters, in press.
Erik A. Kneller, Maureen D. Long, Peter E. van Keken, Ellen Syracuse, and Geoffrey Abers. Olivine fabric transitions and shear wave anisotropy in the Ryukyu subduction system. AGU Fall Meeting, 2006.
Here are some of my past research interests:
Papers and meeting presentations:
Maureen D. Long and Rob D. van der Hilst, 2005. Estimating shear wave splitting parameters from broadband recordings in Japan: a comparison of three methods, Bulletin of the Seismological Society of America, 95, 1346-1358. .pdf
Maureen D. Long and Rob D. van der Hilst, 2005. Upper mantle anisotropy beneath Japan from shear wave splitting. Physics of the Earth and Planetary Interiors, 151, 206-222. .pdf
Maureen D. Long and Rob D. van der Hilst, 2006. Shear wave splitting from local events beneath the Ryukyu arc: Trench-parallel anisotropy in the mantle wedge. Physics of the Earth and Planetary Interiors, 155, 300-312. .pdf
Maureen D. Long and Rob D. van der Hilst, Shear wave splitting and upper mantle anisotropy beneath Japan, AGU Fall Meeting, 2003. (Winner of Outstanding Student Paper Award, Seismology Section.)
Papers and meeting presentations:
Maureen D. Long, Bradford H. Hager, Martijn V. de Hoop, and Rob D. van der Hilst, 2007. Two-dimensional modeling of subduction zone anisotropy with application to southwestern Japan. Geophysical Journal International, 170, 839-856. .pdf
Maureen D. Long, Rob van der Hilst, Martijn de Hoop, and Brad Hager. Constraints on deformation geometry beneath Japan from observations and models of seismic anisotropy. AGU Fall Meeting, 2005.
Papers and meeting presentations:
Maureen D. Long, Xiaohui Xiao, Zhenting Jian, Brian Evans, and Shun Karato, 2006. Lattice preferred orientation in deformed polycrystalline (Mg,Fe)O and implications for seismic anisotropy in D''. Physics of the Earth and Planetary Interiors, 156, 75-88. .pdf
Maureen D. Long, Shun-ichiro Karato, Brian Evans, Zhenting Jiang,
and Xiaohui Xiao, Fabric development in deformed (Mg,Fe)O aggregates and
implications for seismic anisotropy in D'', AGU Fall Meeting, 2002 (
abstract).
Papers and meeting presentations:
Einat Lev, Maureen D. Long, and Rob D. van der Hilst, 2006. Seismic anisotropy in eastern Tibet from shear-wave splitting reveals changes in lithospheric deformation. Earth and Planetary Science Letters, 251, 293-304. .pdf
My undergraduate research project focused on processing Global Positioning
System (GPS) data from Oregon and Washington to obtain velocity vectors
for campaign and continuous GPS sites. Here's
a link to Rob McCaffrey's Pacific NW GPS web page. I did
some GPS field work in Oregon in the summer of 2000, and there are some
field photos here.
Papers and meeting presentations:
Long, M. D., R. McCaffrey and C. K. Johnson, Estimation of forearc
rotation and strain in western Oregon and SW Washington using GPS, AGU
Spring Meeting, 2000. (abstract)
McCaffrey, Robert, Maureen D. Long, Chris Goldfinger, Peter C. Zwick,
John L. Nabelek, Cheryl K. Johnson, and Curt Smith, Rotation and plate
locking at the southern Cascadia subduction zone, Geophysical Research
Letters, 27, 3117-3120, 2000. (.pdf)
I am participating in the High Lava Plains experiment (link here). The seismology component of this project involves the deployment of ~ 100 broadband seismic stations in eastern Oregon, southeastern Idaho, and northern Nevada from 2006-2009. I am heavily involved in the field component of this work, and am also working on the shear wave splitting measurements for the array and comparison with geodynamical models for HLP formation (in collaboration with David James, Matt Fouch, and Chris Kincaid).
I am currently collaborating with Paul Silver on a project looking at global trends in shear wave splitting parameters in subduction zone regions and implications for the subduction-related mantle flow field.
I am currently collaborating with Erik Kneller and Peter van Keken on a project comparing shear wave splitting predictions from numerical models of B-type olivine fabric in the mantle wedge to observed splitting in the Ryukyu arc.
Measurement and interpretation of shear wave splitting beneath Japan (with Rob van der Hilst).
Two-dimensional numerical modeling of subduction zone deformation with applications to Japan (with Brad Hager, Martijn de Hoop, and Rob van der Hilst).
Fabric development
in (Mg,Fe)O aggregates and implications for seismic anisotropy in D'' (with
Shun Karato, Brian Evans, Zhenting Jiang, and Xiaohui Xiao)
I was delighted to be involved with a project headed by Einat Lev and supervised by Rob van der Hilst studying shear wave splitting and lithospheric deformation in Tibet. Here is a link to Einat's research web page.
Crustal deformation and the accomodation of subduction deformation in the Pacific Northwest from GPS (with Rob McCaffrey and others).