The Hayward fault slips in large earthquakes and by aseismic creep observed along its surface trace. Dislocation models of the deformation adjacent to measured with global positioning system interferometric synthetic aperture radar favor at approximately 7 millimeters per year bottom seismogenic zone a 20-kilometer-long northern segment. Microearthquakes same waveform repeatedly occur 4- 10-kilometer depths indicate deep 5 year. difference between current rates long-term slip rate 10 can be...

We solve for the slip rate distribution on Hayward fault by performing a least squares inversion of geodetic and seismic data sets. Our analysis focuses northern 60 km fault. Interferometric synthetic aperture radar (InSAR) from 13 independent ERS interferograms are stacked to obtain range change rates 1992 2000. Horizontal surface displacement at 141 bench marks measured using GPS 1994 2003. Surface creep observations estimates deep determined characteristic repeating earthquake sequences...

Observations of surface deformation allow us to determine the kinematics faults in San Francisco Bay Area. We present Area velocity unification (B V , “bay view”), a compilation over 200 horizontal velocities computed from campaign‐style and continuous Global Positioning System (GPS) observations 1993 2003. interpret this interseismic field using three‐dimensional block model relative contributions motion, elastic strain accumulation, shallow aseismic creep. The total motion between Pacific...

Online courses can feel isolating and sometimes lack human connections that motivate students. We developed a fully online geoscience course to build 'Community of Inquiry' with attention cognitive, social, teaching presences. ran the using nearly identical materials for 8 semesters (recorded video lectures, labs, assignments, assessments). Slight variations in instructor behavior caused profound impacts on student performance, creating natural experiment isolate factors influence...

We use GPS data to measure the aseismic slip along central San Andreas fault (CSAF) and deformation across adjacent faults. Comparison of EDM sets implies that, except for small‐scale transients, motion has been steady over last 40 years. add 42 new velocities CSAF constrain regional strain distribution. Shear rates are less than 0.083 ± 0.010 μ strain/yr creeping SAF, with 1–4.5 mm/yr contraction Coast Ranges. Dislocation modeling gives a deep, long‐term rate 31–35 shallow (0–12 km) creep...

Research Article| June 01, 2003 No frictional heat along the San Gabriel fault, California: Evidence from fission-track thermochronology M.A. d'Alessio; d'Alessio 1Department of Earth and Planetary Science, University California, Berkeley, California 94720-4767, USA Search for other works by this author on: GSW Google Scholar A.E. Blythe; Blythe 2Department Sciences, Southern Los Angeles, 90089-0740, R. Bürgmann 3Department Author Article Information Publisher: Geological Society America...

What teachers believe about their own effectiveness in the classroom influences what and how they teach, so teacher preparation programs should work to cultivate strong self-efficacy beliefs (SEBs) future teachers. I designed a science content course for elementary around simultaneous goals of teaching improving SEBs by activating Bandura’s 4 factors that influence (performance accomplishments, vicarious experience, verbal social persuasion, physical emotional arousal). During semester,...

Heat flow measurements along much of the San Andreas fault (SAF) constrain apparent coefficient friction (μ app ) to <0.2, lower than laboratory‐derived values for most geologic materials. However, heat data are sparse near creeping section SAF, a frictional “asperity” where slips almost exclusively by aseismic creep. We test hypothesis that has substantially higher or μ adjacent sections SAF. use numerical models explore effects faults with spatially and temporally heterogeneous strength...

The San Andreas Fault Observatory at Depth (SAFOD) pilot hole traverses the upper 2 km of a site 1.8 west fault (SAF) near Parkfield, California. In order to evaluate burial and exhumation history its relationship kinematics mechanics SAF, we use 15 apatite fission‐track (FT) 5 (U‐Th)/He analyses from samples document their thermal history. Sample ages decrease with depth: FT range ∼60 ∼31 Ma, respectively, in 800 m ∼3 1 Ma base (2.2 depth, 93°C).Thermal modeling distribution lengths...

Promoting collaboration and discourse in asynchronous online courses is challenging; students need something engaging to talk about, a communications medium which fluidly discuss it, social environment that supports discourse. We designed fully introductory geoscience lecture lab course called Geology Goes Hollywood emphasizes all three of the dimensions community inquiry framework: cognitive presence, teaching presence. To heighten we pair movies with documentaries about issues relevant...

Each year our physical science class for pre-service elementary teachers launches water-powered rockets based on the activity from NASA.1 We analyze rocket flight using data frame-by-frame video analysis of launches. Before developing methods presented in this paper, we noticed students were mired calculation details while losing sight concepts. Sloppy measurements and calculations (even when spreadsheets with formulas provided) sometimes led to such poor results that concepts could not be...

A suite of new techniques in thermochronometry allow analysis the thermal history a sample over broad range temperature sensitivities. New tools must be developed that fully and formally integrate these techniques, allowing single geologic interpretation rate timing exhumation burial events consistent with all data. We model exhumation, (U‐Th)/He age modeling, fission track length modeling. then use genetic algorithm to efficiently explore possible time‐exhumation histories vertical profile...

Students who have a strong urban place-identity may perceive the natural world differently from many geoscience instructors. These thinkers less experience in and are more comfortable built environments. They subtle differences cognitive spatial skill development, interest level environment, comfort with field experiences, possible fears of outdoor settings. Curriculum is effective at reaching when it accounts for these differences. Since short excursions on campus or schoolyard can be...

Abstract The mobile south flank of Kīlauea Volcano hosts two normal fault systems, the Koa'e system (KFS) and Hilina (HFS). In historical time, at least three M>6.5 earthquakes have occurred on basal detachment Volcano's flank, with most recent being 4 May 2018 M6.9 earthquake. Here we analyze kinematic Global Positioning System data collected from 2001 to 2017 interferometric synthetic aperture radar before, during, after earthquake determine crustal motion across HFS KFS faults. Our...

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