PROPOSAL INFORMATION SUMMARY

Improving Southern California Seismic Hazard Models

With a 45-km Shear-Velocity Profile Along the San Gabriel River

John Louie and Rasool Anooshehpoor

Nevada Seismological Lab, University of Nevada, Reno

TABLE OF CONTENTS

Application for Federal Assistance, Standard Form (SF) 424 1

Proposal Information Summary 2

Table of Contents 3

Abstract 4

Budget Summary 5

Budget Explanation 6

Significance of Project 7

Application of expected results to reducing losses from earthquakes in the U.S. 7

Proposed Work 9

References 8

Figure 1 10

Final Report and Dissemination of Results 11

Related Efforts 11

Project Personnel 11

Institutional Qualifications 14

Project Management Plan 15

Current Support and Pending Applications 15

Improving Southern California Seismic Hazard Models

With a 45-km Shear-Velocity Profile Along the San Gabriel River

John Louie and Rasool Anooshehpoor

Nevada Seismological Lab, University of Nevada, Reno

ABSTRACT

We propose to acquire a continuous profile of shallow shear-velocity measurements across the Los Angeles and San Gabriel Valley basins. This research will contribute directly to improving the accuracy of probabilistic seismic shaking hazard maps in southern California. Using the inexpensive and efficient refraction microtremor technique (Louie, 2001), we will derive shear-velocity profiles to 100 m depth at 150 locations spaced at 300 m along a 45-km-long profile. Field (2001) has developed a ground-shaking amplification map for southern California based on the California site-conditions map of Wills et al. (2000) and an attenuation relation combining 30-m geotechnical velocities with basin depths (Field, 2000). The amplifications shown on Field's (2001) map are most dependent on the geological map, where basin depths are less than a few kilometers. Further, rapid variations of amplification are entirely dependent on the geological map, and on the geotechnical velocity data included from the SCEC Community Velocity Model (CVM; Magistrale et al., 2000).

We will derive this geotechnical shear-velocity profile in order to improve the amplification map and thus assist the RELM effort. The profile will be proximal to many strong-motion and TriNet stations, so its results may improve the regressions done by Field (2000) to derive the attenuation relation. Further, the profile will provide a systematic basis for the spatial statistics of velocity variation within the NEHRP-IBC hazard class C and CD units mapped by Wills et al. (2000). A profile similar to that proposed, completed across the Reno basin in Nevada, indicates that the geological map mis-predicts NEHRP hazard class along more than 50% of the profile. Modeling of basin-induced amplifications, such as by Olsen (2000), will also benefit from the additional information on velocity and its shallow variability.

BUDGET SUMMARY

Project Title: Shear Improving Southern California Seismic Hazard Models With a 45-km Shear-Velocity Profile Along the San Gabriel River

Principal Investigators: John N. Louie, Rasool Anooshehpoor

Proposed Start Date: Jan 1, 2003 Proposed Completion Date: Dec 31, 2003

Improving Southern California Seismic Hazard Models

With a 45-km Shear-Velocity Profile Along the San Gabriel River

John Louie and Rasool Anooshehpoor

Nevada Seismological Lab, University of Nevada, Reno

BUDGET EXPLANATION

2/15/2003-2/15/2004

Salaries and Wages

Principal Investigators:

J. Louie, Assoc. Prof. of Seismol., UNR: 0.5 summer month 4600

R. Anooshehpoor, Assoc. Res. Prof., UNR: 0.5 calendar month 3100

Graduate Student Stipend (Seismological Lab): 13200

(12 mo @ 20 hrs/wk, $1100/mo)

Undergraduate Assistant Wages (Seismological Lab):

(2 @ 17 days each, $10/hr, 8 hrs/day) 2720

Total Salaries and Wages $23620

Fringe Benefits

4 % of Summer-Month Salaries $184

25 % of Calendar-Month Salaries 775

2 % of Student Stipends and Wages 318

Total Fringe Benefits $1277

Travel

University or Commercial Vehicle fees for survey fieldwork: $840

(1 truck and 1 ATV for 12 days @ $70/day total, Reno-Los Angeles)

Lodging and per diem during fieldwork (3 people x 12 days at $75/day) 2700

One to a SCEC RELM and a Fall AGU Meeting (avg $600/trip) 1200

Total Travel $4740

Other

Field and computer supplies (includes $2000 shipping and $720 in batteries for 120 Texans) $3500

Computer systems hardware and software fees, system administration 600

and network fees, computer repairs: to support data analysis

Publication costs, printing and copying charges and supplies 797

Graduate student fees: 18 credits @ $107/credit 1926

Total Other $6823

Total Direct Costs $36460

Modified Total Direct Costs (DC minus student fees) (34534)

Indirect Costs (45% of MTDC) $15540

Total Requested from USGS $52000

Improving Southern California Seismic Hazard Models

With a 45-km Shear-Velocity Profile Along the San Gabriel River

John Louie and Rasool Anooshehpoor

Nevada Seismological Lab, University of Nevada, Reno

SIGNIFICANCE OF THE PROJECT

We propose to acquire a continuous profile of shallow shear-velocity measurements across the Los Angeles and San Gabriel Valley basins. Using the inexpensive and efficient refraction microtremor technique (Louie, 2001), we will derive shear-velocity profiles to 100 m depth at 150 locations spaced at 300 m along a 45-km-long profile. Fieldwork for a 16-km-long profile across the Reno basin is complete and preliminary results, using the proposed technique, are presented in figure 1. We propose that the Los Angeles profile follow the San Gabriel River Bike Trail (parallel to I-605), as the Reno profiling effort was most efficient along the Truckee River Bike Trail.

Field (2001) has developed a ground-shaking amplification map for southern California based on the California site-conditions map of Wills et al. (2000) and an attenuation relation combining 30-m geotechnical velocities with basin depths (Field, 2000). The amplifications shown on Field's (2001) map are most dependent on the geological map, where basin depths are less than a few kilometers. Further, rapid variations of amplification are entirely dependent on the geological map, and on the geotechnical velocity data included from the SCEC Community Velocity Model (CVM; Magistrale et al., 2000). "Bullseye" anomalies of unexpected, increased amplification occur where the CVM includes geotechnical profiles having 30-meter velocities significantly lower than those expected for the geological unit (red triangles in figure 2 of Wills et al., 2000).

This project will collect enough data to obtain a realistic view of the variation in geotechnical properties across both the San Gabriel Valley and Los Angeles basins, at a feasible cost that is far lower than what 150 borehole measurements would require.

Application of expected results to reducing losses from earthquakes in the U.S.:

We propose to derive a geotechnical shear-velocity profile across the Los Angeles and San Gabriel Valley basins in order to improve the amplification map. This research directly addresses Element I of the 2003 program with research that "contributes to improvements in the national hazards maps or to assessing earthquake hazards and reducing losses in urban areas." For the Southern California area this project will "Compile seismic, structural, geotechnical, and geologic data from surface, and drill-hole observations necessary to predict regional ground motions," and "Contribute to the southern California 3D model in terms of refining velocity estimates, quantifying uncertainties…." The profile will be proximal to many strong-motion and TriNet stations, and so its results may improve the regressions done by Field (2000) to derive the attenuation relation. Further, the profile will provide a systematic basis for the spatial statistics of velocity variation within the NEHRP-IBC hazard class C and CD units mapped by Wills et al. (2000). These statistics will then be available to SCEC's RELM effort to better define probabilistic estimates of shaking. Modelling of basin-induced amplifications, such as by Olsen (2000), will also benefit from the additional information on velocity and its shallow variability.

Proposed Work:

We suggest the profile follow the San Gabriel River because of the efficiency of conducting such work along urban bicycle paths. Figure 2 of Wills et al. (2000) shows relatively few existing geotechnical measurements along this route, compared to another possible route along the Los Angeles River Bike Trail. A somewhat shorter profile could be completed with the proposed budget through any part of the metropolitan area. The proposed profile follows the path of LARSE-1 offshore-onshore recordings. With the proposed 20-meter instrument spacing, our profile will recover velocities at far shallower depths than the 0.5-km-spaced LARSE-1 array could recover.

The profile will use the refraction microtremor method of Louie (2001), which is similar in concept to the microtremor array soundings by Horike (1985), Liu et al. (2000), and Satoh et al. (2001), for example. Since refraction microtremor uses linear arrays of 4.5-Hz vertical seismometers, it is more efficient for profiling than the widely distributed arrays of 1-Hz instruments. However, refraction microtremor cannot measure velocity down to the basement in basins deeper than a few hundred meters.

At UNR we completed in December 2001 a feasibility test of measuring a shallow shear-velocity profile extending 16 km across the entire Reno basin. This refraction microtremor (Louie, 2001) effort was inexpensive enough to be university-funded, and employed 45 Texan recorders from the PASSCAL Instrument Center. Fieldwork was completedin eight half-days of effort. Most of the profile followed the Truckee River Bike Trail. With full days of effort by a team of three, we expect to profile along the San Gabriel River Bike Trail at a rate of 3 km per day. At 45 km length, we budget 17 days of field effort to complete the proposed profile.

Figure 1 shows preliminary results from the Reno profile. Within a floodplain on the east side of the Reno basin, the 30-meter average velocity (green line on figure 1) jumps by 50%. No geomorphic features suggest this increase from NEHRP-IBC hazard class D to C. The 10-meter velocity shows a significant increase there as well. Actual measurement along the profile shows far more lateral velocity variation than geological mapping would suggest. The floodplain is entirely a unit that Wills et al. (2000) map nearby in California as NEHRP-IBC class D.

The geological maps identify the area of downtown Reno as recent alluvium, and in the scheme of Wills et al. (2000) the downtown area is also identified as NEHRP-IBC class D. Figure 1 shows that 30-meter depth-averaged shear velocities downtown are between 450 and 500 m/s. The measured profile has found that the geological maps effectively overstated the hazard from shaking amplification. A commercial client of the refraction microtremor method, Black Eagle Consultants of Reno, has already commissioned a survey of a building site about 200 m south of the profile in downtown Reno. Yielding a 30-meter shear velocity of 550 m/s, the Reno City Council has already allowed the design of a multistory parking garage to proceed under NEHRP class C specifications. In this way the refraction microtremor method has already led to efficient implementation of IBC hazard-reduction guidelines. The method's low cost and resulting availability at more sites should increase builders' adherence to IBC recommendations.

Wills et al. (2000) found that 25% of measured velocity-depth profiles they considered in California fell outside the velocity range expected for the mapped geologic/soil unit. Figure 1 suggests that this proportion of mis-matches may be larger along the Reno profile, approaching 50%. Almost all the transect would be classed as NEHRP-IBC D under the analysis of Wills et al. (2000). The velocity increases at the ends of the profile are expected from mapped geologic boundaries. The refraction microtremor profiling method offers the opportunity to measure and map the extent of the differences from what is predicted by the geologic map of Wills et al. (2000).

The results of figure 1 are derived from analyses of 15-element array layouts each 300 m long. Phase velocities at low frequencies of 1.5-4 Hz, giving velocities at depths >50 m (Louie, 2001), are not well constrained by these layouts. The Reno profile also contains contiguous 900-m layouts of 45 elements each, which will better constrain velocities at >50 m depth. More information on the Reno profile is available at www.seismo.unr.edu/hazsurv/.

References Cited

Field, E. H., 2000, A modified ground-motion attenuation relationship for southern California that accounts for detailed site classification and a basin-depth effect: Bull. Seismol. Soc. Amer., 90, S209-S221.

Field, E. H., 2001, Earthquake ground-motion amplification southern California: U.S. Geol. Surv. Open-File Rept. 01-164, map poster.

Horike, M., 1985, Inversion of phase velocity of long-period microtremors to the S-wave-velocity structure down to the basement in urbanized areas, J. Phys. Earth, 33, 59-96.

Liu, H. P., Boore, D. M., Joyner, W. B., Oppenheimer, D. H., Warrick, R. E., Zhang, W., Hamilton, J. C., and Brown, L. T, 2000, Comparison of phase velocities from array measurements of Rayleigh waves associated with microtremor and results calculated from borehole shear-wave velocity profiles: Bull. Seismol. Soc. Amer., 90, 666-678.

Louie, J. N., 2001, Faster, better: shear-wave velocity to 100 meters depth from refraction microtremor arrays: Bull. Seismol. Soc. Amer., 91, 347-364.

Magistrale, H., S. Day, R. W. Clayton, and R. Graves, 2000, The SCEC Southern California reference three-dimensional velocity model version 2: Bull. Seismol. Soc. Amer., 90, S65-S76.

Olsen, K. B., 2000, Site amplification in the Los Angeles basin from three-dimensional modeling of ground motion: Bull. Seismol. Soc. Amer., 90, S77-S94.

Satoh, T., H. Kawase, and S. Matsushima, 2001, Estimation of S-wave velocity structures in and around the Sendai Basin, Japan, using array records of microtremors: Bull. Seismol. Soc. Amer., 91, 206-218.

Wills, C. J., M. Petersen, W. A. Bryant, M. Reichle, G. J. Saucedo, S. Tan, G. Taylor, and J. Treiman, 2000, A site-conditions map for California based on geology and shear-wave velocity: Bull. Seismol. Soc. Amer., 90, S187-S208.

FINAL REPORT AND DISSEMINATION OF RESULTS

All reports requested and required by the USGS will be submitted in a prompt and timely manner and the results of the research will be published in a professional journal.

RELATED EFFORTS

Dr. Louie has extensive experience with multi-channel seismic analysis methods (see vita) and is currently involved in research projects to study shallow site and deep basin response in the vicinity of Las Vegas and Reno (see current support). Dr. Anooshehpoor has extensive experience in the analysis of site response recorded data, and in laboratory modeling of earthquake rupture (see vita), and is currently involved in research projects to study shallow site response at precarious rock sites near the San Andreas fault (see current support).

PROJECT PERSONNEL

This study will be conducted jointly by principal investigator John Louie, Associate Professor of Seismology, and co-investigator Rasool Anooshehpoor, Associate Research Professor of Seismology, at the Nevada Seismological Laboratory.

John N. Louie

Seismological Laboratory 174, Mackay School of Mines

The University of Nevada, Reno, NV 89557-0141

(775) 784-4219; fax (775) 784-1833; louie@seismo.unr.edu

Professional Experience

Associate Professor of Seismology, Seismological Laboratory, The University of Nevada, Reno; since January 1992. Responsibilities include undergraduate and graduate instruction, supervision of M.S. and Ph.D. degree candidates, and conducting a research program in seismology.

Assistant Professor of Geosciences, The Pennsylvania State University, University Park, Pennsylvania; Sept. 1987 to Jan. 1992. Responsibilities included undergraduate and graduate instruction, supervision of M.S. and Ph.D. degree candidates, and research in high-resolution seismology.

Relevant Publications

J. N. Louie, 2001, Faster, better: shear-wave velocity to 100 meters depth from refraction microtremor arrays: Bull. Seismol. Soc. Amer., 91, no. 2 (April), 347-364. (Available electronically from http://www.seismo.unr.edu/vs/refr.html).

R. E. Abbott, J. N. Louie, S. J. Caskey, and S. Pullammanappallil, 2001, Geophysical confirmation of low-angle normal slip on the historically active Dixie Valley fault, Nevada: Jour. Geophys. Res., 106, 4169-4181.

R. E. Abbott and J. N. Louie, 2000, Depth to bedrock using gravimetry in the Reno and Carson City, Nevada basins: Geophysics, 65, 340-350.

A. M. Asad, S. K. Pullammanappallil, A. Anooshehpoor, and J. N. Louie, 1999, Inversion of travel data for earthquake locations and three-dimensional velocity structure in the Eureka Valley area, eastern California: Bull. Seismol. Soc. Amer., 89, 796-810.

G. Shields, K. Allander, R. Brigham, R. Crosbie, L. Trimble, M. Sleeman, R. Tucker, H. Zhan and J. N. Louie, 1998, Geophysical surveys of an active fault: results from Pahrump Valley, California-Nevada border: Bull. Seismol. Soc. Amer., 88, 270-275.

Other Important Publications

S. K. Pullammanappallil and J. N. Louie, 1994, A generalized simulated-annealing optimization for inversion of first-arrival times: Bull. Seismol. Soc. Amer., 84, 1397-1409.

J. N. Louie, S. K. Pullammanappallil, and W. Honjas, 1997, Velocity models for the highly extended crust of Death Valley, California: Geophys. Res. Lett., 24, 735-738.

S. Chavez-Perez and J. N. Louie, 1998, Crustal imaging in southern California using earthquake sequences: Tectonophysics, 286 (March 15), 223-236.

S. Chavez-Perez, J. N. Louie, and S. K. Pullammanappallil, 1998, Seismic depth imaging of normal faulting in the southern Death Valley basin: Geophysics, 63, 223-230.

Z. Kanbur, J. N. Louie, S. Chavez-Perez, G. Plank, and D. Morey, 2000, Seismic reflection study of Upheaval Dome, Canyonlands National Park, Utah: Jour. Geophys. Res. (Planets), 105, 9489-9505.

Graduate Education

California Institute of Technology, Pasadena, California. Degrees: Ph.D. Geophysics, June, 1987; M.S. Geophysics, June, 1983.

Rasool Anooshehpoor

Degrees:

Ph.D. Physics, 1988, University of California, San Diego

M.S. Physics, 1983, University of California, San Diego

B.S. Physics, 1976, Shiraz University, Shiraz, Iran

Major Research Interests:

Site Effects and Earthquake Hazards, Physical Modeling of Earthquakes

Experience:

1999- Research Associate Professor, University of Nevada, Reno

1991-1999 Research Assistant Professor, University of Nevada, Reno

1990-1991 Assistant Professor, Shiraz University, Shiraz, Iran

1987-1990 Research Associate, University of Nevada, Reno

1983-1987 Research Assistant, University of California, San Diego

1980-1983 Teaching Assistant, University of California, San Diego

1978-1980 Teaching Assistant, Arizona State University, Tempe, Arizona

Publications:

Anooshehpoor, A., and J. N. Brune, 2002, Verification of precarious methodology using shake table tests of rocks and rock models, J. Soil Dynamics and Earthquake Engineering, special vol., accepted for publication.

Anooshehpoor, A., T.H. Heaton, Shi, B. and J. N. Brune (1999), estimates of the ground accelerations at Point Reyes Station during the 1906 San Francisco earthquake, Bull. Seism. Soc. Am., 89, 845-853.

Anooshehpoor, A. and J.N. Brune (1996). Constraints on ground motion in southern California provided by precarious rocks, Seism. Res. Lett., 67, 2, p.30.

Brune, J. N., J. W. Bell, A. Anooshehpoor, Precariously Balanced Rocks and Seismic Risk (1996), Endeavour, 20 (4), 168-172.

Brune, J.N., Anooshehpoor, A., Stirling, M.W., Anderson, J.G. (1998), Precarious rocks, site effects and seismic hazard in southern California: to be published in proceedings of the 12th Engineering Mechanics Conference, May 1998.

Brune, J.N., Anooshehoor, A. (1998), A physical model of the effect of a shallow weak layer on strong motion for strike-slip ruptures Bull. Seism. Soc. Am., 88, 1070-1078.

Brune, J.N., Anooshehpoor, A., (1999), Dynamic geometrical effects on strong ground motion in a normal fault Model J. Geophys. Res., 104 (B1), 809-815.

Shi, B., A. Anooshehpoor, J.N. Brune and Y. Zeng (1998), Dynamics of thrust faulting: 2D Lattice Model, Bull. Seism. Soc. Am., 88, 1484-1494.

Shi, Baoping, A. Anooshehpoor, Y. Zeng, J.N. Brune (1996), Rocking and Overturning of Precariously Balanced rocks by Earthquakes, Bull. Seism. Soc. Am., 86, 1364-1371.

INSTITUTIONAL QUALIFICATIONS

As one of the statewide research agencies of the University of Nevada, the Seismological Research Laboratory is headed by a Director (J. Anderson) who reports to the Dean, Mackay School of Mines. The current research staff consists of ten professional seismologists. Other professionals include a Research and Design Engineer. Technical staff members include two seismographic technicians, one record analyst, 1.5 FTE of computer support personnel, and five graduate research assistants. The Seismological Laboratory operates the Western Great Basin Seismic Network (USGS Funding; digital upgrades provided by the W.M. Keck Foundation), the Yucca Mountain Digital Seismic Network (DOE-HRC Funding). These networks now include more than three dozen state-of-the-art high-dynamic-range real-time digital stations.

After twelve years of operation of computer-based digital seismic acquisition, over 50,000 local events have been located, and these and many more regional and teleseismic events and blasts have been archived, leading to over 600,000 digital seismograms archived on magnetic tape and CD-ROM. Data bases from paper records and other analog sources extend back to 1916 (e.g. a collection of Wiechert smoked-paper recordings). Earthquake data are now manipulated using the Antelope and CSS database systems developed by BRTT, allowing us to interchange both real-time and archived catalog and seismogram data with the SCSN, NCSN, Oregon, Arizona, and Utah seismic network through data centers at Caltech, Menlo Park, and Salt Lake City.

Computer hardware consists of four Sun servers and twenty Sun workstations with speeds up to 400 MHz, eight Pentium II and III UNIX workstations, and numerous PCs and Macintoshes. These processors are used mainly for research applications and provide a basis for analysis of the accumulating network data base. One of the servers hosts the Lab's web site at www.seismo.unr.edu, which at 30,000-80,000 hits per week is one of the University's most popular public outreach programs. Seismic reflection data sets are processed both with John Louie's ``Resource Geology'' UNIX system for research, and with the industry-standard Halliburton ProMAX system. In partnership with the Nevada Applied Research Initiative, LLNL, and Optim LLC, the Lab is acquiring a 32 Gflop Beowulf parallel processor.

Additional equipment is available for field work and special investigations. The seismology group has 15 portable 3-channel and 20 single-channel "Texan" Reftek seismographs. We have 20 4.5-Hz Texan geophones, 18 Mark Products L-4 1-second, three sets of Kinemetrics 5-second, 10 sets of 1-Hz S13 and several Guralp CMG-5 and CMG-4 broadband seismometers. The W. M. Keck Foundation donated to the Mackay School of Mines (of which the Seismological Lab is a part) a 48-channel, Pentium-based Bison Galileo-21 reflection-refraction recording system, with 700 m cables for 8-Hz refraction geophones; and a high-resolution 210 m segmented roll-along cable with 48 groups of six 100-Hz geophones each. The School maintains as well a Lacoste and Romberg Model G gravimeter with 0.04 mGal demonstrated precision, and three Trimble 4000SSi, dual-frequency, carrier-phase, geodetic GPS receivers.

A grant from the W. M. Keck Foundation also established four years ago the Mapping, Modeling, and Visualization (MMV) Laboratory in the Mackay School of Mines. It consists of 10 PCs and workstations served by a Silicon Graphics multiprocessing supercomputer, with every major GIS, image-processing, geophysical, and geological software package available on multiple platforms. The School is wired for 100 Mbps full-duplex ethernet, with high-speed isolated connections available to all servers. All buildings on campus connect via a 100 Mbps campus fiber network, which has a fiber connection at 155 Mbps to the nearest CALREN/vBNS/Abilene gigaPoP at U.C. Davis.

PROJECT MANAGEMENT PLAN

The project is projected to last one year. Dr. John Louie will be supervising the data collection and reduction, in close consultation with Dr. Rasool Anooshehpoor. All PIs are at the Seismological Laboratory, University of Nevada, Reno. They will be responsible for the completion of the project and submittal of required reports.

Current Support and Pending Applications — John N. Louie

Current:

National Science Foundation/Tectonics: Evolution of the Sierra Nevada - Basin and Range Boundary — Tephrochronologic and Gravity Constraints on the Record in Neogene Basin Deposits, $55,182, 6/1/2000 - 5/30/2002, Cashman, Louie (0.25 summer month), Trexler.

Dept. of Energy/Great Basin Center for Geothermal Energy: Assembly of a Crustal Seismic Velocity Database for the Western Great Basin, $144,584, 4/1/2002 - 3/31/2003, Louie (1.0 summer month).

Dept. of Energy/Lawrence Livermore National Laboratory: 3-D Evaluation of Ground-Shaking Potential in the Las Vegas Basin, $165,000, 5/1/2002 - 4/30/2003, Anderson, Louie (2.0 summer months).

Pending:

Dept. of Energy/University Research for Geothermal Program: 3-D fault and geothermal reservoir imaging method enhancement, $145,961, 9/1/2002 - 8/31/2003, Louie (1.0 summer month), Oppliger.

Dept. of Energy/Nevada Southwest Energy Program: 3-D fault and geothermal reservoir imaging method enhancement, $228,229, 8/1/2002 - 7/31/2003, Louie (1.0 summer month), Oppliger.

USGS/NEHRP: Improving Southern California Seismic Hazard Models with a 45-km Shear-Velocity Profile Along the San Gabriel River, $59,952, 1/1/2003 - 12/31/2003, Louie (0.5 summer month), Anooshehpoor.

Rasool Anooshehpoor

Current

NSF/SCEC, Quantitative Testing of Specific Precarious rocks Critical for Establishing Constraints on Ground Motion and Source Parameters for Large Earthquakes in Southern California, 2/1/2002 – 1/31/2003, $20,000, Anooshehpoor, 1.5 academic months.

Department of Energy/HRC, Precarious Rocks Methodology for Seismic Hazard, 7/1/99 – 9/30/01, $339,562, Brune, 22 days; Anooshehpoor, 6 academic months.

USGS/NEHRP, Verification of Precarious Rocks Evidence for Low Ground Accelerations Associated with Strike-Slip Faults in Extensional Regimes, 03/01/2001-02/28/2003, $49,403, Anooshehpoor, 2 academic months.

Pending

Department of Energy/HRC, Precarious Rocks Methodology for Seismic Hazard, 6/1/2002 – 5/31/2003, $140,056, Anooshehpoor, 6 academic months.

PEER/UC Berkeley, Study of Rupture Directivity in a Foam Rubber Physical Model, 07/01/02-06/30/03, $45,742, Anooshehpoor, 2 academic months.

USGS/NEHRP, Improving southern California seismic hazard Models with a 45-km shear-velocity profile along the San Gabriel River. 1/1/03-12/31/03, $59,952, Anooshehpoor, 0.5 academic months.

USGS/NEHRP, Interpretation of Precarious Rock and Overturned Transformer Evidence for Ground Shaking in the M=7.6 Arvin-Tehachapi Earthquake, an Analog for Disastrous Shaking from a Major Thrust Fault in the Los Angeles Basin, 1/1/03-12/31/03, $49,837, Anooshehpoor, 3 academic months.