Mark A. Hemphill-Haley

• Office: Founders 12
• Phone: 707-826-3933
• Email: markhh*

  * to send email, replace * with @humboldt.edu

• Personal Web Site: www.humboldt.edu/~mah54

Neotectonics, Paleoseismology, Seismic Hazards, Tectonic Geomorphology

Ph.D., Geology, University of Oregon, 1999

M.S., Environmental Science-Geology, Humboldt State University, 1987

B.A., Geology, Humboldt State University, 1982

Professional Background

Joined HSU in 2001

Senior Seismic Geologist, URS Corp. 1999-2001

Senior Seismic Geologist, Woodward-Clyde Consultants, 1985-1993

Research Interests

My interests are primarily centered around contemporary deformation of the western United States. I work on problems of various scales, from trench-scale paleoseismology of individual faults and folds to plate-scale deformation based on geodetic measurements and regional kinematic analyses. I have worked extensively in the Basin and Range geomorphic province and in the transition between the Basin and Range and the Cascade volcanic arc. My current location in northwestern-most California affords me the ability to work on faults within the southernmost, onshore end of the Cascadia subduction zone. I am currently involved in a USGS NEHRP-funded project to evaluate the surface rupture history of the Little Salmon fault, a portion of the fold and thrust belt of the subduction zone.

Theses Supervised

Cheryl Griffith, in progress, Evaluation of Relation between Seismicity, Precipitation and Landslides in a Portion of Northwest California (committee member - M.S.)

John Wellik, in progress, The Sisters fault zone, Deschutes County, Oregon (M.S.)

Ronna Bowers, in progress, Quaternary Geology of the Madeleine Plains, Modoc Plateau, California (M.S.)

Chad Pritchard, 2004, Late Holocene Relative Sea-Level Changes, Arcata Bay, California (committee member - M.S.)

Amy M. Thomson, 2004, Geologic Investigation of the Proposed Gilman Creek Fault Across the Banning Bench Alluvial Fan, San Gorgonio Pass Fault Zone, Banning, CA. (B.S. Senior Thesis)

Jason Robert Patton, 2004, Late Holocene Coseismic Subsidence and Coincident Tsunamis, Southern Cascadia Subduction Zone, Hookton Slough, Wigi (Humboldt Bay), California (committee member - M.S.)

Jay D. Stallman, 2003, Strath Terrace Genesis in the North Fork Elk River Valley, North Coastal California (committee member - M.S.)

Sara C. Smith, 2003, Quaternary Movement on an Inherited Mesozoic Structure: The Rush Peak Fault, West-Central Idaho (commitee member - M.S., Boise State University)

Selected Publications

Hemphill-Haley, M.A. and Weldon, R.J., 2004, Estimating Prehistoric Earthquake Magnitude from Point Measurements of Surface Rupture, in Proceedings of the Basin and Range Province Seismic Hazards Summit II, 2004, William Lund, ed, 21 p.  Submitted and accepted August 2004.

Liberty, L.M., Hemphill-Haley, M.A. and Madin, I.P., 2003, The Portland Hills Fault:  uncovering a hidden fault in Portland, Oregon using high-resolution geophysical methods, Tectonophysics, v. 368, p. 89-103.

Hemphill-Haley, M.A., Liberty, L.M., and Madin, I.P., 2002, Source characterization study of the Portland Hills Fault, Portland metropolitan area, Oregon, Report to the U.S. Geological Survey,  22p.

Madin, I.P. and Hemphill-Haley, M.A., 2001, The Portland Hills fault at Rowe Middle School, Oregon Geology, v. 63, n. 2, p. 47-49

Wong, I.G., Hemphill-Haley, M.A., Liberty, L.M., Madin, I.P., 2001, The Portland Hills fault:  An earthquake generator or just another old fault?, Oregon Geology, v. 63, n. 2, p. 39-47, 50.

Hemphill-Haley, M. A., Page, W. D., Carver, G. A., and Burke, R. M., 2000, Paleoseismicity of the Alvord Fault, Steens Mountain, southeastern Oregon, in Noller, J.S., Sowers, J. M., and Lettis, W. R., eds., Quaternary Geochronology, Methods and Applications, AGU Reference Shelf 4, p. 537-540.

Hemphill-Haley, M. A., Sawyer, T. L., Knuepfer, P. L. K., Forman, S. L., and Wong, I. G., 2000, Timing of faulting events from thermoluminescence dating of scarp-related deposits, Lemhi fault, southeastern Idaho, in Noller, J.S., Sowers, J. M., and Lettis, W. R., eds., Quaternary Geochronology, Methods and Applications, AGU Reference Shelf 4, p. 541-548.

Hemphill-Haley, M.A., and Weldon, R.J. II, 1999, Estimating prehistoric earthquake magnitude from point measurements of surface rupture: Bulletin of the Seismological Society of America, v. 89, p. 1264-1279.

Hemphill-Haley, M.A., Carver, G.A., and Burke, B., 1999, Late Quaternary stratigraphy and Holocene fauting along the eastern margin of Steens Mountain, southeastern Oregon; in Narwold, C., ed., Quaternary Geology of the Northern Quinn River and Alvord Valleys, southeastern Oregon; 1999 Friends of the Pleistocene Field Trip, Pacific Cell,

Kelson, K. I., Forman, S. L., Gardner, J. N., Hemphill-Haley, M. A., Kolbe, T. R., Olig, S. S., Reneau, S. L., Simpson, G. D., and Wong, I. G., 1996, Latest Pleistocene and possibly Holocene displacement along the Rendija Canyon Fault, Los Alamos County, New Mexico: New Mexico Geological Society Guidebook, v. 47.

Olig, S. S., Kelson, K. I., Gardner, J. N., Reneau, S. L., and Hemphill-Haley, M., 1996, The earthquake potential of the Pajarito Fault system, New Mexico: New Mexico Geological Society Guidebook, v. 47th Field Conference, p. 143-152.

Wong, I. G., and Hemphill-Haley, M. A., 1992, Seismicity and faulting near the Hayward and Mission faults, in Second Conference on Earthquake Hazards in the Eastern San Francisco Bay Area, Hayward, California, p. 207-215.

Wong, I., Hemphill-Haley, M., and Salah-Mars, S. 1993, The Scotts Mills, Oregon, earthquake on March 25, 1993, Earthquakes and Volcanoes, v. 24, n. 2., p. 86-92.