Institute for Crustal Studies
1997/98 Annual Report

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Other Projects and Activities

Seminars and Workshops:


October 17, 1997

"Fundamental Limits and New Directions in Seismometry" by Peter Rodgers.

January 28, 1998

"Application of Bayesian statistics to the inference of tectonic stress" by Paul Spudich

February 11, 1998

"Structural and tectonic evolution of the Cape Colbeck region, Eastern Ross Sea, Antarctica" by Rob Meyer, Bruce Luyendyk, Chris Sorlien and Doug Wilson.

February 18, 1998

"Earthquakes on Dipping Faults: The Effects of Broken Symmetry" by David D. Oglesby, Ralph J. Archuleta, and Stefan B. Nielsen.

February 23, 1998

"Strong Ground Motion in the Near Source of Dipping Faults (or What Should We Expect from the Next Santa Barbara Earthquake?)" by Ralph Archuleta.

May 6, 1998

"Probabilistic Seismic Hazard Assessment in Southern California" by Dave Jackson.

May 20, 1998

"Nonlinear Site Response: From Laboratory Modeling to Field Data Modeling" by Luis Fabian Bonilla, Daniel Lavallee, and Ralph J. Archuleta.

Off Campus — Invited Lectures

November 10, 1997

"Seismic Sensors: Fundamental Limits and New Directions" by Peter Rodgers. Presented as the Keynote address at the IRIS Instrumentation Workshop, Santa Fe, NM.

November 11, 1997

"New Seismic Sensors on the Scene" by Peter Rodgers. Presented at the IRIS Instrumentation Workshop, Santa Fe, NM.

December 1, 1997

"Ground Motion in Los Angeles: Anticipating the Next Big Earthquake" by Ralph Archuleta. Presented at the International Symposium on Natural Disaster Prediction and Mitigation, Kyoto, Japan

December 4, 1997

"Dynamics of Dip-Slip Faulting" by Ralph Archuleta. Presented to the Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan.

February 3, 1998

"Rupture Dynamics and Near-Source Ground Motion" by Ralph Archuleta. Presented to ORI, Inc., Shimizu Corporation, Tokyo, Japan.

February 4, 1998

"Lateral Variations in Strong Ground Motion: Source or Site?" by Ralph Archuleta. Presented to ORI, Inc., Shimizu Corporation, Tokyo, Japan.

March 5 1998

"3-D simulation of a dynamic rupture, and simulation of scenario earthquakes on the Wellington fault" by Kim Olsen. Presented to the Institute for Geological and Nuclear Sciences, Wellington, New Zealand.

March 17, 1998

"The Glacial Record and the Causes of Climate Change" by John C. Crowell. Presented at The Coast Geological Society Meeting, Ventura, CA.


Research Experience for Graduates:

Nineteen graduate students are supported by research grants administered through ICS. They have presented their research with 14 talks or posters at professional meetings: e.g. , American Geophysical Union, Geological Society of America, Seismological Society of America, annual Southern California Earthquake Center. Nine students are co-authors on papers.

Molly Trecker received a Mildred E. Mathias Graduate Student Research Grant to collect shells on Santa Cruz Island for dating the marine terrace on the island.

Fabian Bonilla was supported by the French Commissariat Energie Atomique to spend a month at their research facilities in Fontenay aux Roses outside of Paris. He and his French collaborators Drs. Jean Christophe Gariel and Fabrice Cotton used data from GVDSA to compare different methods of estimating site effects.

As mentioned earlier Oglesby was the recipient of the Department of Geological Sciences G. K. Gilbert and Wendell Woodring Awards. Oglesby, along with Archuleta and Nielsen, was invited to present his results on the dynamics of dipping faults at the American Geophysical Union Meeting in Boston.

Eleanore Jewel was selected as one of four graduate students in the DGS to display her research poster in Webb Hall for the 1998/99 academic year. Jewel’s poster, co-authored by Olsen and Archuleta was "1979 Coyote Lake Earthquake: Comparison of Data and 3D Simulation Results. "

Antonio Garcia, with financial support from a USGS research grant, the University of Granada, the Geological Society of America and UCSB, worked with Prof. Jose Chacon of the University of Grenada to elucidate the Quaternary history and uplift of the eastern end of the Sierra Nevada, Spain.

Research Experience for Undergraduates:

SCEC sponsored summer internships for three undergraduates: Carmen Alex, Neil Morgan and Erik Ronald under the mentorship of Drs. Olsen, Archuleta and Edward Keller, respectively. Each produced reports and presented their results at the SCEC annual meeting as well as the AGU meeting in San Francisco. They also presented posters during a meeting with state legislators here at UCSB.

Erik Ronald’s report was titled "Emergent Shoreline Features in the Santa Barbara Fold Belt: Possible Evidence for Holocene Coseismic Uplift"

Carmen Alex’s research "Lens-Effect in Santa Monica?" was a numerical analysis of the effect of subsurface structure as a possible cause for the anomalously high amount of damage in Santa Monica. This result was recently published in Geophysical Research Letters 25, pp. 3441-3444, 1998 with C. M. Alex, K. B. Olsen as authors.

Neil Morgan did his research on "Effects of the Landers Earthquake on Groundwater in Southern California. " Morgan found that while there were no precursory effects in water wells, there were suspicious post-earthquake effects for wells in San Bernardino and near Palomar Mountain. Water in wells in San Bernardino showed an immediate rise in their level, but this effect decayed to normal about two weeks after the event. At Palomar Mountain the concentration of total dissolved solids increased markedly at the time of the earthquake but returned to normal in about two weeks.

Gretchen Mullendore, working with Archuleta and Bonilla co-authored a paper presented at the 12 th American Society of Civil Engineers Conference on Engineering Mechanics: " Van Norman Dam Complex: Highly Variable Large Amplitude Ground Motion Over Small Distances" Mullendore also presented her results to state legislators and to the DGS.

Eight undergraduates spent six weeks with Luyendyk on an NSF sponsored research cruise in the South Pacific. The students assisted in the collection of geophysical data on the Manihiki Plateau in order to learn more about its plate tectonic history.

Public Service Activities:

The Press

The ICS web site (Understanding Earthquakes) has been used in two new books. "The Busy Educator's Guide to the World Wide Web" by Marjan Glavac published this year and "Cyberspace for Kids" written by The Mandel Kids: Aliza, Jeremy, Wendy and Corey to be released next year by Dennison/Instructional Fair. Only 350 sites are mentioned in "Cyberspace for Kids. "

The Discovery channel is making an 'earthquake tour' of the Western US. They are putting daily updates from their tour on the World Wide Web: . In particular, Olsen is featured on June 22, showing earthquake simulations for the Los Angeles area.

Archuleta was a special guest in the television program UCSB in View extolling the virtues of ICS. Luyendyk was interviewed by KEYT news on Mar. 18th about the news story of revised earthquake probabilities for southern California. Olsen and Alex made news (Los Angeles Times, Dec. 9, 1997) with their explanation of focusing seismic waves as the cause of severe, but locally concentrated, damage in Santa Monica and Sherman Oaks.


Bohrson gave a talk (July 24) on how volcanoes work to a group of gifted high school students from around the country who are here at UCSB attending a science camp run by Miriam Polne-Fuller at MSI.

Aaron Martin and Oglesby gave an earthquake talk at Santa Barbara Christian School. They talked to Ms. Beard's 5th grade class about plate tectonics and earthquakes, and also demonstrated a seismograph by letting the students create and record their own "earthquakes" by jumping up and down.

Jamie Steidl and Martin gave an earth science presentation to Peggy Lubchenco's seventh grade class (La Colina Junior High). Topics included sea-floor spreading, plate tectonics, plate boundaries and different types of faults, earthquake safety and some significant California earthquakes. Martin gave a brief presentation on modern data acquisition systems and their applications to the study of earthquakes. Steidl and Martin made a similar presentation to Julie Armstrong's fourth grade class at Isla Vista Elementary School.

Marc Kamerling made an hour and a half presentation to Mr. Ken Stone's Fifth Grade class at Peabody Charter School about the geology and geologic history of the Santa Barbara Channel and Santa Cruz Island. The class was preparing to go to Santa Cruz Island as part of the "Los Marineros" program. This talk gave them an opportunity to appreciate what they were about to see.

Martin gave a short presentation to Prof. Jeffrey Lee's Environmental Geology class on the use of modern data acquisition systems for recording earthquakes especially in an urban (i.e., noisy) environment.

The Public

Jeff Lee presented a talk on "Active Faults in the Owens Valley Region" to the Owens Valley Inter-Agency Committee (OVIAC), Bishop, CA. OVIAC is comprised of individuals from various local, state, and federal agencies (e.g. National Forest Service, Bureau of Land Management, etc. ) and private companies (primarily Los Angeles Dept. of Water and Power). In attendance were: head of Caltrans for Owens Valley area, second in command for LADWP, head of Fish and Game, head of the National Forest Service, head of the BLM, head of the tourist board, head of the Red Cross disaster relief, head of the Lake Lahoutan Water District.

Archuleta presented a talk "Strong Ground Motion in the Near Source of Dipping Faults (or What Should We Expect from the Next Santa Barbara Earthquake?)" to UCSB Engineering. Dr. John C. Crowell, professor emeritus, presented a talk to the South Coast Geological Society: "The Glacial Record and the Causes of Climate Change"

Archuleta gave one of four general education talks during UCSB Parent’s weekend: "Earthquakes in Southern California."

Five undergraduates (Alex, Marcy Davis, Morgan, Mullendore, Ronald) displayed posters and answered questions about their research (describe above) during a visit by State legislators.

Other Research and Activities:

Besides their contribution to the intellectual environment of the campus and their interface with the public, ICS researchers have been active members of their professions.

Everett was elected to the Board of Directors of the American Society for Testing Materials. Everett was asked by NASA to conduct a peer review of the Department of Energy’s dense, non-aqueous phase liquid demonstration program at the Kennedy Space Center, Florida. Steidl served on the review panel for the USGS external grants program. Olsen was named the Web Editor for the Seismological Society of America. Archuleta and Alexei Tumarkin have been jointly serving as the corresponding member to the NSF Committee for the Advancement of Strong Motion Programs. Archuleta serves on the NSF National Research Council Committee on Seismology. He also is in his second (and final) year as President of the Seismological Society of America.

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