Kate Chen's homepage
It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who neither know victory nor defeat.
~ Theodore Roosevelt
The nature of creeping faults: Where, Why and how they slip slowly
The goal of this session is to bring together different disciplines for improving our understanding on why and how faults creep. We encourage multi-disciplinary contributions from geological, geophysical, experimental, and modeling studies of creeping faults. We hope to reach out studies on difficult creeping faults, to plan for future international collaboration. Below please see the description of this session.
Primary Convener
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Department of Earth Sciences,
National Taiwan Normal University
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Convener
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Department of Earth and Planetary Sciences,
UC Berkeley
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Recent Talks/papers
(TALK) Serpentinite and creep along the Bartlett Springs Fault at Lake Pillsbury (Diana Moore in USGS, 2018)
Review article:
* From geodetic imaging of seismic and aseismic fault slip to dynamic modeling of the seismic cycle (Avouac, 2015)
* Large earthquakes and creeping faults (Harris, 2017)
*The geophysics, geology and mechanics of slow fault slip (Bürgmann, 2018)
Presenters' newly published papers:
*Surface Creep Rate of the Southern San Andreas Fault Modulated by Stress Perturbations From Nearby Large Events (Xu et al., GRL, 2018)
*Episodic creep events on the San Andreas Fault caused by pore pressure variations
(Khoshmanesh and Shirzaei, Nature Geoscience, 2018)
*Frictional Mechanics of Slow Earthquakes (Leeman, Marone, and Saffer, JGR, 2018)
*Buried shallow fault slip from the South Napa earthquake revealed by near-field geodesy (Brooks et al., Science Advances, 2018)
*Continuous chatter of the Cascadia subduction zone revealed by machine learning (Rouet-Leduc et al., Nature Geoscience, 2018)
more to come...
Conveners
talking....
this webpage serves as a preview, news, and summary of our AGU session. Not only just a session to present our works but also a place to facilitate future collaborations.
Thank you all for participating in our session. The oral and poster sessions went successfully because of your great works and active discussions!
We hope to continue this session next year, by asking more questions associate with different style of aseismic slip: how much we know about their signatures, processes, and mechanics. We also look forward to seeing comparison between different fault systems: How does the nature of creeping faults change with the style of faulting, loading rate, and other factors? (Q3 this year)
Let's get together next year and bring up something new!
Special issue in JGR will be opened.
"Creep on continental faults and subduction zones: Geophysics, geology, and mechanics"
latest update 2018/12/21
Oral Session (T42D)
Time:
Thursday, 13 December 2018 (10:20 - 12:20)
Location:
Marriott Marquis- Liberty M
Invited talk: 13 min talk + 5 min Q&A
regular talk: 8 min talk + 6 min Q & A
1-12
12-13
13-18
1-7
7-8
9-14
10:20 Kelin Wang (invited talk)
(Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada)
Intriguing Mechanics of Fault Creep in the Neighborhood of Locked Patches
* How far from a locked patch can deep creep be sustained?
* How is deep creep driven by tectonic forces against stress shadow?
* How is the ETS zone reloaded for 100’s of years against the stress shadow of the locked zone updip?
* Is localized elastic strain accumulation truly a universal observation?
10:52 Romain Jolivet
(Ecole Normale Supérieure Paris)
Observing the Small Scale of Aseismic Slip along Continental Strike Slip Faults from Space
Slow slip appears made of bursts (Is that a general behavior? Does steady-state creep event exists?)
What are the mechanical implications (regular rate-weakening behavior, to first order potential role of geometry/ stress interactions?)
11:34 Benjamin A. Brooks (Johanna Nevitt)
(U.S. Geological Survey)
Shallow Fault Slip and Near-fault Deformation on the Creeping Section of the San Andreas Fault
Shallow creep (down to 75 m) can be measured through ALS and MLS. At such shallow layer the near-fault slip velocity changes after Parkfield event - more slip reaching the surface afterward （how is it different from deep creep variation?)
*Buried shallow fault slip from the South Napa earthquake revealed by near-field geodesy (Brooks et al., Science Advances, 2018)
11:48 Marieke Rempe
(Ruhr University Bochum)
Rate-and-state framework possibly applicable to shallow creep deformation
Comparison with previous studies points to (1) stress corrosion or (2) pressure solution as active mechanisms
At higher temperatures or lower strain rates, viscous deformation of the bulk material will take over
Poster session (T51J)
Time: Friday, 14 December 2018 (8:00-12:20)
Location:
Walter E Washington Convention Center- Hall A-C (Poster Hall)
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T51J-0316: Accelerating Creep in Northern Japan due to Erosion of Locked Asperities in the Decade Prior to the M9 Tohoku Earthquake
Eric Burton
(Indiana University Bloomington)
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T51J-0317: Distribution of fault creep along northern California faults from Sentinel-1
Jerlyn L Swiatlowski
(University of California, Riverside)
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T51J-0318: Observing a Wide Range of Fault Creep Behavior in California using Geodetic Imaging
Andrea Donnellan
(Jet Propulsion Laboratory, California Institute of Technology)
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T51J-0319: Simultaneous Strainmeter and Creepmeter Observations of Creep events on the San Andreas Fault near Parkfield: A Framework to Observe and Quantify Creep EventsDavid Mencin
(UNAVCO, Inc., University of Colorado at Boulder)
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T51J-0320: Optical Fiber Strainmeters and the Potential for the Detection of Slow Slip Events
William Hatfield
(University of California San Diego)
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T51J-0321: Surface Creep Rate of the Southern San Andreas Fault Modulated by Stress Perturbations from Nearby Large Events
David T Sandwell
(University of California San Diego)
* published in GRL
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T51J-0322: Slow Slip Events: Earthquakes in Slow MotionSylvain Michel
(University of Cambridge)
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T51J-0323: Breaking Cascadia's Silence: Machine Learning Reveals the Constant Chatter of the Megathrust
Bertrand Rouet-Leduc
(Los Alamos National Laboratory)
*published in Nature Geosciences
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T51J-0326: An Aseismic Slip Episode in 2016 Near The Southern End of Longitudinal Valley Fault (LVF) in Taiwan
Yunfeng Tian
(Institute of Crustal Dynamics, China Earthquake Administration)
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T51J-0327: Reviewing the electrical properties and its implication of the creeping Chihshang Fault with magnetotelluric and High-Resolution Electrical Resistivity Imaging measurements
Ping-Yu Chang
(Institute of Geophysics, National Central University)
*published in J. Appl. Geophys.
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T51J-0328: Depth variations of fault friction parameter derived from dynamic modeling of GPS afterslip associated with the 2003 Mw 6.5 Chengkung earthquake in eastern Taiwan
Jian-Cheng Lee
(Institute of Earth Sciences, Academia Sinica)
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T51J-0330: Time-dependent aseismic slip from repeating earthquakes along the Longitudinal Valley fault in Taiwan
Yaochieh Chen
(Department of Earth Sciences, National Taiwan Normal University)
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T51J-0335: Thermal Gradient Controlled Creeping Behavior of the Central Philippine Fault on Leyte Island Revealed by SAR Interferometry
Ying-Hui Yang
(Central Weather Bureau, Taiwan)
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T51J-0337: Coseismic ruptured creeping Guanxian-Anxian fault during the 2008 Mw 7.9 Wenchuan earthquake (China)
Haibing Li
(Institute of Geology, Chinese Academy of Geological Sciences)
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T51J-0331: Seasonal Modulation of Deep Slow-slip and Earthquakes on the Main Himalayan Thrust
Dibyashakti Panda
(National Institute of Technology Rourkela)
The interplay between elastic stiffness and the rheologic rate of fault weakening controls slow slip rupture velocity.
*Frictional Mechanics of Slow Earthquakes (Leeman, Marone, and Saffer, JGR, 2018)
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T51J-0332: Surface creep along the East Anatolian Fault
Ziyadin Cakir
(Istanbul Technical University)
Key Questions
1. How much do we know about the similarities and differences between shallow creep (upper few km) and deep creep (>10 km deep) from microstructures, mineral composition, lithologic properties and conditions, geodesy, and geophysical methods?
From Table 2 in Burgmann (2018) below, one can check research components needed for shallow-to-deep creep.
2.What is the role of deep and shallow creep in the size and timing of large earthquakes?
3.How does the nature of creeping faults change with the style of faulting, loading rate, and other factors?
4. How well we recognize zones of aseismic slip deformation through integrated data?
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T51J-0336: Coulomb Stress Changes by Long-term Slow Slip Events in the Southcentral Alaska Subduction Zone
Anuradha Mahanama
(Bowling Green State University)
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T51J-0315: Slow Slip Events on the San Andreas Fault Caused by Episodic Pore Pressure Elevation
Mostafa Khoshmanesh
(Arizona State University)
published in Nature Geosciences
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T51J-0324: Superfast Propagation of Slow Slip Rupture
Eiichi Fukuyama
(National Research Institute for Earth Science and Disaster Resilience)
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T51J-0329: Fault mechanism in active creeping Chihshang fault, Taiwan
Wen-Jie Wu
(National Central University)
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T51J-0338: Carbonaceous materials in the fault zone of the Longmenshan fault belt: Records of seismic slip from trench and implications for faulting mechanism
Jialiang Si
(Institute of Geology, CAGS)
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T51J-0339: Mechanical controls on the distribution of earthquake afterslip from fault zone drilling and laboratory testing
Johanna Nevitt
(U.S. Geological Survey)
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T51J-0340: Role of Dilatant Hardening on Stabilization of Fault Slip in Experimentally Deformed Permeable Rocks
Taka Kanaya
(University of Maryland College Park)