Solid-Earth Geophysics Journal Club/Discussion Group
Unless otherwise noted, we meet Tuesdays at 10AM in the seismology conference room (R-175). All are welcome to attend.
* Please send suggestions of recent GRL, Nature, Science (Geochem/Geophys), Geology, or other short papers for
us to discuss. *
December 5, 2006
AGU practice talks: Warren, Taira
November 28, 2006
Morra, Regenauer-Lieb, and Giardini, Curvature of oceanic arcs,
Geology, 34, 877-880, 2006.
November 21, 2006
Thanksgiving -- no meeting.
November 14, 2006
Vinnik and Farra, S velocity reversal in the mantle transition zone,
GRL, 33, L18316, doi:10.1029/2006GL027120.
Wednesday, November 8, 2006, 3PM
James Hammond: "Imaging the upper-mantle beneath the Seychelles:
Architecture of a microcontinent"
October 31, 2006
No meeting.
October 24, 2006
Hirano et al., Volcanism in response to plate flexure, Science, 313,
1426-1428, 2006.
October 17, 2006
Iaffaldano, Bunge, and Dixon, Feedback between mountain belt growth
and plate convergence, Geology, 34, 893-896, 2006.
THURSDAY, October 12, 2006, 2PM
Taka'aki Taira practice talk.
THURSDAY, October 5, 2006
Jennifer Jackson will present her research.
September 26, 2006
Taka'aki Taira: "Direct Detection of Temporal Variations in Seismic
Scatterers at Seismogenic Depth Attributed to the 2004 Parkfield Earthquake"
September 19, 2006, 2PM
Selwyn Sacks: "Water in the Mantle Beyond the Volcanic Front"
September 12, 2006
Discussion of James Lovelock's The Revenge of Gaia.
August, 2006
No meetings.
THURSDAY, July 27, 2006
Selwyn Sacks: "The Creative Use of Fresnel Zones"
July 18, 2006
Hutko et al., Seismic detection of folded, subducted lithosphere at the
core-mantle boundary, Nature, 441, 333-336, 2006.
July 11, 2006
Tonegawa et al., Lower slab boundary in the Japan subduction zone, EPSL, 247, 101-107, 2006.
July 4, 2006
Holiday -- no meeting.
June 27, 2006 (2PM)
Fialko, Interseismic strain accumulation and the earthquake potential on
the southern San Andreas fault system, Nature, 441, 968-971, 22 June 2006.
May 16, 2006, Abelson seminar room
Justin Hustoft: "An Experimental Investigation of the Early Evolution of Terrestrial Planets"
May 9, 2006
No meeting
May 2, 2006
Ekstrom, Nettles, and Tsai, Seasonality and increasing frequency of
Greenland glacial earthquakes, Science, 311, 1756-1758, 2006.
WEDNESDAY, April 26, 2006, 4PM
Jason Phipps Morgan: "What is the asthenosphere?"
MONDAY, April 24, 2006, 2PM
Lara Wagner practice talk
April 18, 2006
Chris Kincaid: "The role of back-arc spreading in 3-D circulation and
temperature patterns in subduction zones: Results from recent lab modeling"
April 11, 2006
WISZ meeting at this time instead.
April 4, 2006
Conrad and Lithgow-Bertelloni, Influence of continental roots and asthenosphere on plate-mantle coupling, GRL, 2006.
March 28, 2006
Lavier and Manatschal, A mechanism to thin the continental lithosphere at
magma-poor margins, Nature 440, 324-329, 2006.
March 21, 2006, 9:45AM
Kanda and Stevenson, Suction mechanism for iron entrainment into the
lower mantle, GRL, 2006.
Buffett, Garnero, and Jeanloz, Sediments at the top of Earth's core,
Science, 2000.
March 14, 2006, 11AM, Seminar Room
Helge Gonnermann: "Precarious magma ascent - explosive or effusive volcanism?"
March 7, 2006
LPSC practice talk: Cathy Hier-Majumder
February 28, 2006
Olson and Allen, The deterministic nature of earthquake rupture, Nature 438, 212-215, 10 Nov 2005.
Ellsworth and Beroza, Seismic evidence for an earthquake nucleation phase, Scieince 268, 851-855, 1995.
Mori and Kanamori, Initial rupture of earthquakes in the 1995 Ridgecrest, California sequence, Geophy. Res. Lett. 23, 2437-2440, 1996.
February 21, 2006
Asphaug et al., Hit-and-run planetary collisions, Nature 439,
12 January 2006.
Canup and Asphaug, Origin of the Moon in a giant impact near the end of the Earth's formation, Nature 412, 16 August 2001.
THURSDAY, February 16, 2006, 2PM
Lara Wagner will tell us about her research. (This meeting is in combination with the new Water in Subduction Zones
reading group. See Lara to join the group.)
February 7, 2006
Paul Silver will present a talk: The Rise of Imposter Continents.
January 31, 2006
No meeting.
January 24, 2006
Michael, Sanchez, and McNutt (2005). Periodically triggered
seismicity at Mount Wrangell, Alaska, after the Sumatra earthquake,
Science 208, 1144-1146, 2005.
FRIDAY, January 20, 2006, 11AM
Linda Warren will present her research: Constraints on the Physical
Mechanism of Deep Earthquakes from Observations of Source Finiteness
December, 2005
No meetings.
November 29, 2005
Fall AGU practice talks: Cottrell, Savage, Taira, Warren
November 22, 2005
No meeting (Thanksgiving).
November 15, 2005
November 8, 2005
10:00AM: Liz Cottrell will present her research: "Big things come in small packages: The 'micro-nugget' problem and its bearing on models of planetary core formation"
10:30AM: Cathy Hier-Majumder will present her research: "Interiors of Planetary Bodies: Formation of Iron Cores in Terrestrial Planets and Methods for Characterizing Interiors of Extrasolar Planets"
November 1, 2005
No meeting.
October 25, 2005
Zhang et al., Inner core differential motion confirmed by earthquake
waveform doublets, Science, Vol 309, 1357-1360, 2005.
Rubinstein and Beroza, Nonlinear strong ground motion in the
ML 5.4 Chittenden earthquake: Evidence that preexisting damage
increases susceptibility to further damage, GRL, v. 31, L23614,
doi:10.1029/2004GL021357, 2004.
October 18, 2005
Ren et al., The chemical structure of the Hawaiian mantle plume,
Nature, 436, 11 August 2005, 837-840.
Steinberger et al., Prediction of Emperor-Hawaii seamount locations from a revised
model of global plate motion and mantle flow, Nature, 430, 8 July 2004, 167-173.
October 11, 2005, 2PM
Katie Cooper will present her research: "Stable Subcontinental Lithospheric
Mantle: What is it? How did it get there? What's it doing?"
October 4, 2005
No meeting.
September 27, 2005
Kao et. al., A wide depth distribution of seismic tremors along the
northern Cascadia margin, Nature 436, 841-844, 2005.
Melbourne et al., Extent and duration of the 2003 Cascadia slow earthquake,
GRL, vol. 32, L04301, doi:10.1029/2004GL021790, 2005.
September 20, 2005, 2PM
Saffer and McKiernan: Permeability of underthrust sediments at the Costa
Rican subduction zone: Scale dependence and implications of dewatering,
GRL Vol 32, L02302, doi: 10.1029/2004GL021388, 2005.
Lin, Hsu and Sibuet: Melting features along the Ryukyu Slab tear,
beneath the southwestern Okinawa Trough, GRL Vol 31, L19607,
doi:10.1029/2004GL020862, 2004.
August, 2005
No meetings. Journal Club will resume in September.
July 26, 2005
Buck, Lavier, and Poliakov, Modes of faulting at mid-ocean ridges, Nature 434, 719-723, 7 April 2005.
July 19, 2005
No meeting.
THURSDAY, July 14, 2005, 2PM
Kumar, Yuan, Kind, and Kosarev, The lithopshere-asthenosphere boundary in the
Tien Shan-Karakoram region from S receiver functions: Evidence for continental subduction,
GRL 32, L07305, doi:10.1029/2004GL022291, 2005.
July 12, 2005
No meeting (NSF program officer visiting to discuss how to write proposals).
WEDNESDAY, July 6, 2005: New Madrid
Smalley, Ellis, Paul, and Van Arsdale, Space geodetic evidence for rapid strain
rates in the New Madrid seismic zone of central USA, Nature 435, 1088-1090, 23 June 2005.
June 28, 2005, 2PM: 2004 Sumatra-Andaman Earthquake
Ishii, Shearer, Houston, and Vidale, Extent, duration and speed of the 2004 Sumatra-Andaman
earthquake imaged by the Hi-Net array, Nature, doi:10.1038/nature03675, 22 May 2005.
Park et al., Earth's free oscillations excited by the 26 December 204 Sumatra-Andaman earthquake,
Science 308, 1139-1144, 20 May 2005.
For more articles on the earthquake, see the special issue of Science.
June 21, 2005: Observations of PKJKP
Cao, Romanowicz, and Takeuchi, An observation of PKJKP:
Inferences on inner core shear properties, Science 308, 1453-1455, 3 June 2005.
Okal and Cansi, Detection of PKJKP at intermediate periods by progressive multi-channel correlation,
EPSL 164, 23-30, 1998.
Deuss, Woodhouse, Paulssen, and Trampert, The observation of inner core shear waves,
GJI 142, 67-73, 2000.
June 7, 2005
No meeting (IRIS/UNAVCO meeting).
THURSDAY, June 2, 2005
Mantle convection workshop preview: Catherine Hier-Majumder.
May 24, 2005
No meeting (Spring AGU meeting).
May 17, 2005
Spring AGU preview: Taka'aki Taira, Selwyn Sacks.
May 10, 2005
No meeting.
May 3, 2005, 10:30AM
Katayama, Jung, and Karato (2004). New type of olive fabric from
deformation experiments at modest water content and low stress.
Geology. Vol. 32. pp. 1045-1048.
And a review of previously-announced fabric types:
Zhang and Karato (1995). LPO of olivine aggregates deformed in simple shear.
Nature. Vol 375. pp. 774-777.
Jung and Karato (2001). Water-Induced Fabric Transitions in
Olivine. Science. Vol. 293. pp. 1460-1463.
Bystricky, Kunze, Burlini, and Burg (2000). High shear strain
of olivine aggregates: Rheological and Seismic Consequences. Science.
Vol. 290. pp. 1564-1567.
THURSDAY, April 28, 2005 -- POSTPONED
Catherine Hier-Majumder will present her research.
FRIDAY, April 22, 2005
Matt Fouch will present his research.
THURSDAY, April 21, 2005, 10AM
Dayanthie Weeraratne will present her research.
April 19, 2005, 2PM
Lucy Flesch will present her research.
April 12, 2005
Shapiro, Campillo, Stehly, and Ritzwoller, High-resolution surface-wave
tomography from ambient seismic noise, Science, 307, 1615-1618, 2005.
Snieder and Hagerty, Monitoring change in volcanic interiors using coda
wave interferometry: Application to Arenal Volcano, Costa Rica, GRL, 31,
L09608, doi 101029/2004GL019670, 2004.
April 5, 2005
Helffrich and Kaneshima, Seismological constraints on core composition from
Fe-O-S liquid immiscibility, Science 306, 2239-2242, 24 Dec 2004.
March 29, 2005
Pedersen and Sigmundsson, INSAR based sill model links spatially offset
areas of deformation and seismicity for the 1994 unrest episode at
Eyjafjallajokull volcano, Iceland, GRL 31, L14610,
doi:10.1029/2004GL020368, 2004.
Pritchard, M. E., M. Simons (2002) A satellite geodetic survey of
large-scale deformation of volcanic centres in the central Andes. Nature
418, 167-171.
March 22, 2005
Sandiford et al., Evaluating slab-plate coupling in the Indo-Australian
plate, Geology 33, 113-116, Feb 2005.
Lave et al, Evidence for a Great Medieval Earthquake (~1100 AD) in the Central
Himalayas, Nepal, Science 307, 1302-1305, 25 Feb 2005.
March 15, 2005
Sue Webb will present her research.
March 8, 2005
No meeting.
THURSDAY, March 3, 2005
Saad Haq will present his research.
February 22, 2005
Lizarralde et al, Spreading-rate dependence of melt extraction at mid-ocean ridges
from mantle seismic refraction data, Nature 432, 744-747, 9 Dec 2004.
February 15, 2005
No meeting.
THURSDAY, February 10, 2005, 2PM
Kendall et al., Magma-assisted rifting in Ethiopia,
Nature 433, 146-148, 13 January 2005.
And for another interpretation: Gashawbeza et al., Shear-wave splitting in Ethiopia:
Precambrian mantle anisotropy locally modified by Neogene rifting,
GRL 31, doi:10.1029/2004GL020471, 2004.
van Wijk, Role of weak zone orientation in continental lithosphere extension,
GRL 32, doi:10.1029/2004GL022192, 2005.
February 1, 2005
Venkataraman, Nyblade, and Ritsema,
Upper mantle Q and thermal structure beneath Tanzania, East Africa
from teleseismic P wave spectra,
GRL 31, doi:10.1029/2004GL020351, 2004.
A couple of the referenced papers:
Nyblade, Heat flow across the East African Plateau, GRL 24, 2083-2086, 1997.
Brazier, Nyblade, Langston, and Owens, Pn wave velocities beneath the
Tanzania craton and adjacent rifted mobile belts, East Africa,
GRL 27, 2365-2368, 2000.
Selwyn suggested an earlier study in the region:
Slack et al., Attenuation and velocity of P-waves in the mantle beneath the East African
Rift, Kenya, Tectonophysics 236, 331-358, 1994.
January 25, 2005: Inner-Core Rotation
Vidale and Earle, Evidence for inner-core rotation from possible changes
with time in PKP coda, GRL 32, doi:10.1029/2004GL021240, 2005.
Laske and Masters, Rotation of the inner core from a new analysis of free
oscillations, Nature 402, 66-69, 1999.
Song and Richards, Seismological evidence for the differential rotation of
the inner core, Nature 382, 221-224, 1996.
January 18, 2005
Gerst and Savage, Seismic anisotropy beneath Ruapehu volcano: A possible
eruption forecasting tool, Science 306, 1543-1547, 2004.
Yamawaki, Nishimura, and Hamaguchi, Temporal change of seismic structure
around Iwate volcano inferred from waveform correlation analysis
of similar earthquakes, GRL 31, doi:10.1029/2004GL021103, 2004.
January 11, 2005
Sawai et al., Transient uplift after a 17th-century earthquake along the
Kuril subduction zone, Science 306, 1918-1920, 10 Dec 2004.
Marris, Inadequate warning system left Asia at the mercy of tsunami, Nature 433,
3-5, 6 Jan 2005.
December 2004
No meetings.
November 30, 2004
Kevin Burke is going to present this recent paper of his: Burke, K., and T.H. Torsvik,
Derivation of Large Igneous Provinces of the past 200 millions years
from long-term heterogeneities in the deep mantle, EPSL 227, 531-538, 2004.
Selwyn has suggested several papers as reference:
Sacks, I.S., and L. Beach,
Lateral Heterogeneity at the base of the mantle - An indication of whole mantle convection, 1973.
Sacks, Snoke, and Beach, Lateral heterogeneity at the base of the mantle
revealed by observations of amplitudes of PKP phases, Geophys. J. R. astr.
Soc. 59, 379-387, 1979.
Snoke and Sacks, Seismic modelling of lateral heterogeneity at the base
of the mantle, Geophys. J. R. astr. Soc. 86, 801-814, 1986.
Stop by my office for photocopies of these articles.
November 23, 2004
Rhie, J., and B. Romanowicz,
Excitation of Earth's continuous free oscillations by atmosphere-ocean-seafloor coupling,
Nature 431, 552-556, 30 September 2004.
Cochran, E.S., J.E. Vidale, S. and Tanaka,
Earth tides can trigger shallow thrust fault earthquakes,
Science 306, 1164-1166, 12 November 2004.
November 16, 2004
Bowman, D., G. King, and P. Tapponier,
Slip partitioning by elastoplastic propagation of oblique slip at depth,
Science 300, 1121-1123, 16 May 2003.
Shaw, B.E.,
Self-organizing fault systems and self-organizing elastodynamic events on them:
Geometry and the distribution of sizes of events,
Geophys. Res. Let. 31, L17603, doi:10.1029/2004GL019726, 2004.
WE WILL MEET UPSTAIRS IN THE ASTRONOMY LIBRARY.
November 9, 2004
Nadeau, R.M., and T.V. McEvilly,
Periodic pulsing of characteristic microearthquakes on the San Andreas fault,
Science 303, 220-222, 9 January 2004.
Szeliga, W., T.I. Melbourne, M.M. Miller, and V.M. Santillan,
Southern Cascadia episodic slow earthquakes,
Geophys. Res. Let. 31, L16602, doi:10.1029/2004GL020824, 2004.
November 2, 2004
Freed, A.M., and R. Burgmann,
Evidence of power-law flow in the Mojave desert mantle,
Nature 430, 548-551, 29 July 2004.
Hetland, E.A., and B.H. Hager,
Relationship of geodetic velocities to velocities in the mantle,
Geophys. Res. Let. 31, L17604, doi:10.1029/2004GL020691, 2004.
October 26, 2004: Tibet
Shapiro, N.M., M.H. Ritzwoller, P. Molnar, and V. Levin,
Thinning and Flow of Tibetan Crust Constrained by Seismic Anisotropy,
Science 305, 233-236, 9 July 2004.
Wright, T.J., B. Parsons, P.C. England, and E.J. Fielding,
InSAR Observations of Low Slip Rates on the Major Faults of Western Tibet,
Science 305, 236-239, 9 July 2004.
October 19, 2004
Cottrell, E., C. Jaupart, and P. Molnar,
Marginal stability of thick continental lithosphere,
Geophys. Res. Let. 31, L18612, doi:10.1029/2004GL020332, 2004.
Baseball.
October 12, 2004
No meeting.
October 5, 2004
No meeting.
September 28, 2004: SAFOD
Boness, N. L., and M. Zoback (2004), Stress-induced seismic velocity
anisotropy and physical properties in the SAFOD Pilot Hole in Parkfield,
CA, Geophys. Res. Lett., 31, L15S17, doi:10.1029/2003GL019020.
Hickman, S., and M. Zoback (2004), Stress orientations and magnitudes
in the SAFOD pilot hole, Geophys. Res. Lett., 31, L15S12,
doi:10.1029/2004GL020043.
These articles are from the GRL special section on SAFOD.
September 21, 2004: A Post-Perovskite Phase in D"
Iitaka, T., K. Hirose, K. Kawamura, and M. Murakami,
The elasticity of the MgSiO3 post-perovskite phase in the Earth's
lowermost mantle, Nature 430, 445-448, 22 July 2004.
Obanov, A.R., and S. Ono, Theoretical and experimental evidence
for a post-perovskite phase of MgSiO3 in Earth's D" layer,
Nature 430, 442-445, 22 July 2004.
September 14, 2004: Foundering Lithosphere Beneath the Southern Sierras
Boyd, O.S., C.H. Jones, and A.F. Sheehan,
Foundering Lithosphere Imaged Beneath the Southern Sierra Nevada,
California, USA, Science 305, 660-662, 30 July 2004.
Zandt, G., H. Gilbert, T.J. Owens, M. Ducea, J. Saleeby, and C.H. Jones,
Active foundering of a continental arc root beneath the southern Sierra
Nevada in California,
Nature 431, 41-46, 2 September 2004.
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