Welcome to the Web page of Dr. Hanan Mahdi

University of Arkansas at Little Rock (UALR)


 

Professional Information

  • Title: Research Associate Professor
    • BS, University of Baghdad
    • MS, University of Baghdad
    • PhD, St. Louis University

Contact Information

 picture of Dr. Mahdi

Professional Career

PROFESSIONAL EXPERIENCE

SCIENTIFIC RESEARCH

Seismology

I had been involved with the Research and Development program to support the United States Air Force Technical Application Center (AFTAC) operational mission of monitoring a Comprehensive Test Ban Treaty. The projects I had been involved with included, signal enhancement, detection and onset time determination, better estimate of surface wave magnitude, and characterization of seismic instrumentations as part of the International Seismic Arrays Installation Program

Studying Scattering and multi-pathing effect on surface wave propagation at regional distances in central Asia. The study uses broadband digital seismic data recorded by Kyrghyzia network operated by IRIS Joint seismic program since 1991. Single station and array processing techniques are both merged and utilized.

Studying spectral characteristics of earthquakes and explosions recorded at regional and teleseismic distances for the purpose of discriminating small earthquakes and explosions. One aspect of this analysis is studying the spectral amplitudes of array beam of both earthquake and explosion to examine the effect of different azimuths and stacking phase velocity on surface wave amplitude spectrum. This is part of a study using array processing methods to enhance signals in the 0.01 to 0.2 Hz band

Analysis of the lateral and regional variation of seismic wave velocity in the crust and upper mantle using seismic surface wave data and utilizing inversion procedure to derive velocity models and to correlate them with geological and tectonic setting of the region. This analysis has been applied to derive velocity models for Western United States, Africa, central Asia, and Lopnor, the Chinese nuclear test site.

Studying the regional and lateral variation of anelasticity to understand the evolution of the continental crust and upper mantle using seismic surface wave attenuation. This investigation includes measurement of anelastic attenuation coefficients and inversion of these measurements to derive anelastic structural model and correlate it with the tectonic and thermal history of a specific region.

Near Surface Geophysics

I am actively involved in conducting shallow geophysical research for environmental, archeological, highways and other subsurface problems. Ground Penetrating Radar (GPR) and Electrical Resistivity methods are among the methods that are utilized for conducting this research.

Paleoseismology

Since 2000 I have been a member of a research team conducting a comprehensive geological and geophysical investigation to identify and characterize specific features related to historic and prehistoric earthquakes near the southern terminus of the New Madrid Seismic Zone in eastern Arkansas. Aerial and field surveys revealed the existence of liquefaction and linear features as far as south of Marianna, Arkansas. Field surveys in the study area have been conducted to locate features potentially generated by earthquakes. We are planning to trench, log, sample, and document the selected features. Ground penetrating radar (GPR) and electrical resistivity geophysical surveys have been planed to be conducted before trenching the features

Lunar Research

The Electrostatics and Surface Physics Laboratory (ESPL) at Kennedy Space Center has been actively involved in characterization of lunar dust to understand the soil properties for lunar regolith. As a member of UALR team, we are collaborating with ESPL in order to develop models for detecting the areas with the largest concentration of ilmenite or other minerals of interest as part of this research project. We are researching GPR as a method of detecting sub-surface ilmenite on the Moon. The main goals of the research project will be to perform synthetic computer modeling of GPR data for specific minerals that are present in the lunar soil and are of interest to NASA for In-Situ Resource Utilization. Laboratory measurement of GPR data for natural minerals and ores will be conducted. The detection capability will be investigated for both percentage of mineral concentration and depth. We will be using both lunar samples and samples collected from geophysical fieldwork for natural deposits, mainly ilmenite in southwest Arkansas.

Ring Laser Gyroscope

The goal of this project is to adapt two established terrestrial geophysical systems for the exploration of the moon and Mars. The first is ground penetrating radar (GPR) system which is an ideal tool for identifying subsurface geological features and the presence of water within a kilometer of the surface. The second is a ring laser gyroscope system designed as a seismic wave detector. Results from a large ring laser gyroscope north of Conway that is currently monitoring seismic waves from earthquakes and atmospheric disturbances are being analyzed to determine its applicability for monitoring seismic waves on the moon and Mars. The possibility of using the ring laser and the GPR as systems for navigation prior to landing and then as geophysical exploration tools will be explored.

Monitoring Induced Seismicity in Central Arkansas

Induced seismicity is earthquake cluster(s) that is activated or triggered by human activities. There are ample evidences that water injection affects the pore pressure and stress regime in the volume where the water is propagating and triggering small to moderate size earthquakes. We proposed equipment integration and installation of a 7 station array with three component sensors and radio telemetry equipment, to monitor any induced seismic activity that might occur due to water injection activity in the area. The sensors will be Geospace GS11d high output 4.5 Hz seismometers, installed in a waterproof PVC case. Low power analog radio will be used to provide wireless data transfer to the central data acquisition site from locations up to 20Km away. The central station will be very close to the injection well. Each station will be provided with a 10ft antenna mast and a directional antenna as well as a weatherproof fiberglass box that will house the battery and telemetry equipment. The seismic signals will be digitally recorded with a 12 bit A to D board utilizing the USGS earthworm recording and analysis system. Continuous data of this network will be systematically analyzed and stored in multiple copies and be available for easy access. Event data will be retrieved from the raw data and logged in a separate archive

Dohuk Seismic Station, Iraq

The Arkansas Earthquake Center is currently collaborating with the University of Dohuk/Iraq to install a state of the art seismic station. The project was funded by DOE and the University of Dohuk. The installation is completed and the seismometer installed in its permanent vault. Data start flowing and being archived and analyzed continuously.

PUBLIC EDUCATION

Support the Arkansas Center for Earthquake Education and Technology Transfer (ACEETT) to accomplish its public education mission by participating in the following activities: 1. provide earthquake workshops promoting seismic safety, mitigation, education and planning for professional groups. 2. Disseminate earthquake information related to seismic education and technical training needs of the state. 3. Provide an enhanced internet seismic and technical database and educational resources for students and general public. 4. Provide assistance to professional education organizations, and scientific and technical groups concerning their needs for seismic education and technology transfer.

PUBLICATIONS

Sallomy, J. T. and H. H. Al-Khatib (1986a). Basement tectonics in the Al-Salman area, SW desert, Iraq, Arabian J. Sc. Eng. 11, 77-85.

Sallomy, J. T. and H. H. Al-Khatib (1986b). Analysis of gravity and magnetic data in the study of the structure and tectonics of the Arar area, SW desert, Iraq,Arabian J. Sc. Eng.11, 213-224.

Al-Khatib, H.H. and B.J.Mitchell (1989). Lateral variation of anelasticity in the upper mantle beneath the western United States from Rayleigh wave attenuation, EOS, American Geophysical Union,70,401. (abstract).

Al-Khatib, H. H. and B. J. Mitchell (1991). Upper mantle unelasticity and tectonic evolution of the western United States, J. Geophys. Res. 96,1829-1846.

Mellors, R.J., H.H. Al-Khatib, H.J. Al-Shukri, G.L. Pavlis, M.W. Hamburger, and F.L. Vernon (1992). Preliminary Analysis of Data from the Kirghizia Telemetered Broadband Seismic Network,EOS, American Geophysical Union,(abstract).

Pavlis, G, H. Al-Shukri, H.H. Mahdi, D. Repin, F. Vernon (1994). JSP arrays and networks in Central Asia, IRIS Newsletter,9-12.

Pavlis, G.L., H.H. Mahdi, and F.L. Vernon (1994). Surface wave propagation in central Asia; observations of scattering and multipathing with the Kerghys broadband array, (abstract) 1994 AFOSR annual meeting.

Romer, S.A., H.H.Mahdi, H.J. Al-Shukri(1995). Preliminary surface wave analysis of data from Kirghizia Broadband seismic network, (abstract),1995 MAS meeting.

Mahdi,H.H., and G.L.Pavlis (1995). Crustal and uppermost mantle structure beneath Eastern Tien Shan from Broadband surface wave data, (abstract),GSA 1995 meeting.

Pavlis,G.L., and H.H.Mahdi (1995). The spatial stability of Rayleigh wave amplitudes and path dependent propagation characteristics of central Asia, (abstract) 1995 AFOSR annual meeting.

Mahdi,H.H., and G.L.Pavlis (1995). Spatial stability of Rayleigh wave amplitude and path dependent stacking capabilities of the Kyrghystan Broadband Network, (abstract) 1995 AGU fall meeting.

Pavlis,G.L., H.H.Mahdi (1996). surface wave propagation in central Asia: Observations of scattering and multipathing with the Krygyz Broadband Array, J. Geophys.Res.,101,8437-8455.

Mahdi,H.H., and G.L.Pavlis (1996). Lateral velocity variations in the crust and upper mantle beneath the Tien Shan from surface wave: Implications for tectonic and dynamic processes, (abstract) 1996 SSA annual meeting.

Al-Shukri, H.J., H.H. Mahdi, and K.D. Hutchenson (1997). Evaluation of the F-statistics Onset-time Estimator, ENSCO Inc. Final Technical Report, ARS 97-069.

Al-Shukri, H.J., H.H. Mahdi, and K.D. Hutchenson (1997). Signal Detection Using Covariance Matrix of Array Data,(abstract) AGU Fall Meeting.

Mahdi,H.H., and G.L.Pavlis (1998). Lateral velocity variations in the crust and upper mantle beneath the Tien Shan from surface wave: Implications for tectonic and dynamic processes. J. Geophys. Res., 103, 2693 -2703.

Mahdi, H.H., and K.D. Hutchenson (1998). Test and Evaluation of the Long Period Surface Wave Multi-signal Processor, ENSCO Inc. Final Technical Report, ARS-98.

Al-Shukri, HJ, Lemmer, R., Connelly, J, Mahdi, H, and Egan, M. (2000). Paleoseismic Features in the Southern Terminus of the New Madrid Seismic Zone, EOS, Transaction of the America Geophysical Union, 81, No.48, PF857 (abstract).

Hanan H. Mahdi, Haydar J. Al-Shukri, Robert E. Lemmer, Jeffrey B. Connelly, and Michael B. E. Bograd (2001). Investigation of possible paleoliquefaction features in Mississippi, Mississippi Academy of Science Annual Meeting.

Robert E. Lemmer, Haydar J. Al-Shukri, Jeffrey B. Connelly, and Hanan H. Mahdi (2001). Liquefaction and other possible seismogenic features southwest of the New Madrid seismic zone in eastern Arkansas, Preceding of the Mississippi Academy of Science Annual Meeting.

Al-Shukri, H.J., Lemmer, R.E., Mahdi, H.H., and Connelly, J.B.(2001). spatial and temporal characteristics of paleoseismic features in the southern terminus of the new madrid seismic zone in eastern Arkansas,(abstract), Seismological Society of America annual meeting, San Francisco, CA.

Connelly, Jeffrey B., Hanan H. Mahdi, Robert E. Lemmer, Marilyn Egan, and Haydar J. Al-Shukri,(2001). paleoseismic features in the southern part of the new madrid seismic zone, Arkansas Academy of Science Annual Meeting.(abstract).

Sami Eyuboglu, Hanan H. Mahdi, , and Haydar J. Al-Shukri,(2003). Detection of Water Leaks using Ground Penetrating Radar, the 3rd International Conference on Applied Geophysics. (abstract).

Al-Shukri, HJ, Hanan Mahdi, Martitia P. Tuttle and (2003). Spatial and Temporal Characteristics of Paleoseismic Features in the Southern Terminus of the New Madrid Seismic Zone in Eastern Arkansas, United States Geological Survey, 03HQGR0050

Al-Shukri, HJ, Hanan Mahdi, Dawood Mahmood, and Nawal Alridha (2004) Current Status and Future Planning for Earthquake Monitoring in Iraq, Gulf Seismic Forum, United Arab Emirates

Sami Eyuboglu, Hanan Mahdi, and Haydar Al-Shukri (2004). Ground Penetrating Radar: A Geophysical Tool to Search for Water on Mars, IEEE Trans Geoscience and Remote Sensing.

Al-Shukri, HJ, and Hanan Mahdi (2004). Detection of water leak using Ground Penetrating Radar, Central Arkansas Water, Little Rock, Arkansas

Sami Eyuboglu, Hanan Mahdi, and Haydar Al-Shukri (2004). Detection of Water Leak Using Ground Penetrating Radar, Geophysics.

Al-Shukri, HJ, Hanan Mahdi, and Dawood Mahmood (2005). Rebuilding Iraqi Seismic Data Center and Earthquake Network, Gulf Seismic Forum-II, Al-Ain, UAE.

Mahdi, Hanan, Martitia P. Tuttle, and Haydar Al-Shukri (2005). 3-d imaging of earthquake-induced liquefaction features with ground penetrating radar , Seismological Society of America, Eastern Section Annual Meeting, Memphis, TN.

Martitia P. Tuttle, Hanan Mahdi, and Haydar Al-Shukri (2005). Very Large Earthquakes Centered Southwest of the New Madrid Seismic Zone 5,000-7,000 Years Ago, Seismological Society of America, Eastern Section Annual Meeting.

Al-Shukri, Haydar, Sami Eyuboglu, and Hanan Mahdi (2005). Water leak detection by using ground penetrating radar, synthetic simulation and four-dimensional visualization, American Geophysical Union Annual Meeting.

Al-Shukri Haydar J., Robert E. Lemmer, Hanan H. Mahdi, and Jeffrey B. Connelly (2005). Spatial and Temporal Characteristics of Paleoseismic Features in the Southern Terminus of the New Madrid Seismic Zone in Eastern Arkansas, Seismo. Research Lett.. 76, 502-511.

Al-Shukri, Haydar, Hanan Mahdi, and Martitia Tutule (2006). Three-Dimensional Imaging of Earthquake-induced Features with Ground Penetrating Radar, Near Marianna, Arkansas, Seismo, Res, Lett, 77, 505-513.

Al-Shukri, Haydar, Hanan Mahdi,, and Okba Al Kadi (2006). Application of Ground Penetrating Radar for Near Surface Geology, Highway Geophysics-NDE Conference, 19p,

Tuttle, Martitia, Hanan Mahdi, and Haydar Al-Shukri (2006). Very Large Earthquakes Centered Southwest of the New Madrid Seismic Zone 5,000-7,000 Years Ago, Seismo, Res, Lett, 77, 664-678.

Al-Shukri, Haydar, Hanan Mahdi, and Martitia Tuttle (2006). Big earthquake can occur in unexpected places, Gulf Seismic Forum-III, Muscat, Oman.

Gok, R, H. Mahdi, H. Al-Shukri and A. Rodgers(2007). Crustal structure of Iraq from receiver functions and surface wave dispersion, Gulf Seismic Forum-V, Kuwait City, Kuwait.

Numan, N, H. Mahdi, and H. Al-Shukri(2007). Seismotectonics of northern Iraq, Gulf Seismic Forum-V, Kuwait City, Kuwait.

Gok, Rengin, Hanan Mahdi, Haydar Al-Shukri, and Arthur J. Rodgers (2007). Crustal Structure of Iraq from Receiver Functions and Surface Wave Dispersion, Geophysical Journal International. 171, 10 pages.

Al-Shukri, HJ, HH, Mahdi, O. Al-kadi, and M, Tuttle(2008). Geophysical investigation of earthquake induced paleoseismological features, 33rd IGC, Oslo, Norway.

Al Kadi, Okba, Hanan Mahdi, and Haydar Al-Shukri (2008) Geophysical Investigation of Earthquake Induced Liquefaction Features, East Central Arkansas, The Fifth Highway Geophysics Conference, NC, USA, 431-445.

Al-Shukri, Mahdi, Biris, Dunn, Trigwell, Arens (2008). Noninvasive Lunar prospecting for ore and minerals, NASA-EPSCoR, Technical Report

Dunn, Mahdi, and Al-Shukri (2009). Design of a relatively inexpensive Ring Laser Seismic Detector, BSSA,V99,PP1437-1442
 

Awards and Recognition:

  • Technical paper awards, ENSCO Inc., Nov.1997
  • Technical paper awards, ENSCO Inc., Feb. 1998
  • Outstanding contribution to ENSCO's pursuit of excellence award, ENSCO Inc., March, 1998
  • Science Teachers Research Involvement for Vital Education Award, August, 2000
  • Career Day Earthquake education Award, March, 2001, Williams Magnet School, Little Rock, Arkansas.
  • Science Fair Judging, Jan. 2006, LISA Academy, Little Rock Arkansas
  • Outstanding teaching award in the 2nd annual UALR-Cebeli Summer School in Turkey, 2006
  • Science Fair Judging, Jan. 2007, LISA Academy, Little Rock Arkansas
  • Science Fair Judging, Jan. 2008, LISA Academy, Little Rock Arkansas
  • Science Fair Judging, Jan. 2009, LISA Academy, Little Rock Arkansas
  • Science Fair Judging, Jan. 2010, LISA Academy, Little Rock Arkansas
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