About Me

GuitaristI am currently working towards a Ph.D. in Geophysics. I frequent racquetball courts, coffee shops, and social networking sites. On the rare occasion that I have some time to myself, I like to play the guitar. Otherwise, I am pretty busy traveling to field sites, coding scripts and programs, or processing and modeling data.

Education

In May of 2001, I graduated with an Associate of Arts degree in Liberal Arts from Leeward Community College (LCC), in Pearl City, Hawaii. While attending LCC, I took an introductory geology class taught by Professor Kakkala Mohanan. Dr. Mohanan influence led me to pursue a higher education in geology.

In August of 2005, I graduated with a Bachelor of Science in Geology from Northern Arizona University (NAU), in Flagstaff, Arizona. My childhood experience in the Philippines fueled my interest in earthquakes, and led to an independent research project, which was eventually submitted as a señor thesis, entitled ‘Analysis of historic seismicity in the Transition Zone and southern Basin and Range of southeastern Arizona‘, under the supervision of Professor David Brumbaugh.

In May of 2008, I graduated with a Master of Science in Geology, The University of Texas at El Paso (UTEP). My research at UTEP, was focused on active-source seismology, which was used to image subsurface structures. A thesis was submitted, entitled ‘Seismic evidence and tectonic significance of an intracrustal reflector beneath the inner California Continental Borderland and Peninsular Ranges‘, under the guidance of Professor Kate Miller.

I am currently working towards a Doctor of Philosophy degree in Geophysics, at The University of Oklahoma (OU). My research includes crustal structures, seismogenic processes, and earthquake hazards. My studies comprise field-based operations, lab observations, and computer modeling. Co-advisors for the research are Professors Randy Keller and Ze’ev Reches.

Academic Interests

I am interested in employing multi-disciplinary approaches to solving tectonic problems, with emphasis on continental crust evolution and mantle dynamics. My previous graduate research focused on the tectonic evolution of the inner California Continental Borderland-Peninsular Ranges transition zone, during western Transverse Ranges rotation, using seismic refraction and regional gravity data. My undergraduate research defined the first earthquake focal mechanism for the southeastern Arizona Transition Zone and its current tectonic regime. Although my research has been in seismology, I am also interested in field geology, fracture and fault propagation, heavy-isotope geochemistry, computer programming, and geographic information systems (GIS).

Current Research

RUBIX:

I am conducting a comparative study of the Rigid Uplifted Blocks In eXtension (RUBIX) phenomenon. The study focuses on three tectonically rigid blocks: the Colorado Plateau in North America, the Tanzania craton in Africa, and the Ordos Basin in eastern Asia. Much of the study is still in development, but it will include analyses of geologic, seismic, gravity, and geochemical data.

ROGA:

We have recently developed the first laboratory setting in which loading parameters can be controlled, and measurements be taken on rocks that are rotationally slid along each other through a ROtational Gouge Apparatus (ROGA). ROGA simulates conditions that are similar to earthquake conditions. In this research, we hope to delineate the key parameters that generate earthquakes, from minor tremors to disasterous events.

Abstracts & Publications

Chang, J.C., Boneh, Y., Lockner, D.A., and Reches, Z., 2010, Fault Wear Experiments, Part II: Transient and Steady-State Stages Under Earthquake-Like Slip-Velocity History: Geological Society of America Abstracts with Programs, v. 42, no. 5. [abstract]

Boneh, Y., Chang, J.C., Lockner, D.A., and Reches, Z., 2010, Fault Wear Experiments, Part I: Transient and Steady-State Stages Under Constant Slip-Velocity: Geological Society of America Abstracts with Programs, v. 42, no. 5. [abstract]

Chang, J.C., Reches, Z., Lockner, D.A., and Totten, M.W., Jr., 2009, Earthquake-like Slip Events on a Laboratory Fault: Eos Transactions, American Geophysical Union, 90(52), Fall Meeting Supplement, Abstract T12B-07.

Závada, P., Dědeček, P., Holloway, S., and Chang, J.C., 2009, On the geological origin of Devils Tower, Wyoming – A new hypothesis constrained by field research, analogue and thermal modeling data, and gravimetric survey: Geological Society of America Abstracts with Programs, v. 41, no. 7, p. 444. [abstract]

Reches, Z., Lockner, D.A., Chang, J.C., Totten, M.W., Jr., 2009, Earthquake-like slip events on an analog laboratory fault: Southern California Earthquake Center Annual Meeting Proceedings and Abstracts, v. 19, p. 320.

Chang, J.C., and Keller, G.R., 2008, A comparative study of the Colorado Plateau, Tanzania Craton, and Ordos Basin: Geological Society of America Abstracts with Programs, v. 40, no. 6, p. 377. [abstract]

Chang, J.C., 2008, Seismic evidence and tectonic significance of an intracrustal reflector beneath the inner California Continental Borderland and Peninsular Ranges [M.S. Thesis]: El Paso, University of Texas, 96 p. [abstract]

Chang, J.C., and Miller, K.C., 2007, Regional significance of lower-crustal reflectivity in the California Continental Borderland: Eos Transactions, American Geophysical Union, 88(52), Fall Meeting Supplement, Abstract S33A-1038. [abstract]

Chang, J.C., and Brumbaugh, D.S., 2005, Analysis of historic seismicity in the Transition Zone of southern Arizona: Eos Transactions, American Geophysical Union, 86(25), Fall Meeting Supplement, Abstract S23B-0235. [abstract]

Chang, J.C., 2005, Analysis of historic seismicity in the Transition Zone and southern Basin and Range of southeastern Arizona [B.S. Thesis]: Flagstaff, Northern Arizona University, 48 p. [abstract]

Professional Appointments

Teaching Assistantship:

Introduction to Field Methods (Spring 2009)
Introduction to Geology (Fall 2008)
Introduction to Geology (Spring 2008)
Introduction to Geology (Fall 2007)
Structural Geology (Fall 2006)
Pathways Outreach Program (Summer 2006)
Geographic Information Systems (Spring 2006)
Introduction to Earth Sciences (Fall 2005)
Introduction to Geology (Spring 2005)

Research Assistantship:

Devils Tower Gravity Survey (August 2009)
High Lava Plains (HLP) Seismic Experiment (September 2008);
GEON (Summer 2008)
GEON (Summer 2005)

University of Oklahoma:

GSA Campus Representative (2009 to present)
CPSGG Twitter Feed Author (2008 to present)
CPSGG Facebook Page Administrator (2008 to present)

Geological Society of America:

Ad Hoc Commitee on eGSA, Member-at large (2008-present)
Student Volunteer (Fall Meeting, 2006)
Student Volunteer (Fall Meeting, 2005)
Student Volunteer (Fall Meeting, 2004)

Regional Geospatial Service Center, University of Texas at El Paso:

GIS Analyst (Spring-Summer 2007)

Northern Arizona University:

USGS Digital Cartographer (Summer 2005)

Arizona Earthquake Information Center, Northern Arizona University:

Seismic Technician (2004-2005)

Professional Affiliations

Awards

Department of Geological Sciences Graduate Scholarship, British Petroleum Scholarship Fund (2005)

Outstanding Student in Advanced Field Methods, Geology Graduate Students Organization, Northern Arizona University (2005)

Excellence in Presentation of Original Research, College of Engineering and Natural Sciences, Northern Arizona University (2005)

Hooper Undergraduate Research Award, Department of Research and Graduate Studies, Northern Arizona University (2004-2005)

Contact Info

Address:

The University of Oklahoma
School of Geology and Geophysics
100 East Boyd Street, Suite 718
Norman, Oklahoma 73019

Office:

(405) 325-5075

Fax:

(405) 325-3140

Other:

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