Geothermal Research by J. M. Lees

Hengill Iceland

El-Kibbi, M., Lees, J.M., Rial, J., Tang, C. and Thordarson, S., (2005). Dense Seismic Recordings at Hengill Geothermal, Eos Trans. AGU, Fall Meet. Suppl., pp. S51A-0978.

Tang, C., Rial, J.A. and Lees, J.M., (2006). Seismic Imaging of the Geothermal Field at Hengill, Iceland Using Shear-wave Splitting, Eos Trans. AGU, Fall Meet. Suppl., pp. T13A-0496.

Krafla Iceland

Tang, C., Rial, J.A. and Lees, J.M., (2008). Seismic Imaging of the Geothermal Field at Krafla, Iceland Using Shear-wave Splitting. J. Volc. Geoth. Res.: in press.

Tang, C., Rial, J.A., Lees, J.M. and Thompson, E., (2005). Seismic Imaging of the geothermal field at Krafla, Iceland, Proceedings, Thirteenth Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA, pp. SGP-TR-176.

Coso Geothermal, CA Presentation (pdf)

The Coso Geothermal field of southeastern California provides an exceptional laboratory for determining the relationship between hydrothermal fluid flow, tectonic and induced seismicity, and heat sources in the extensional regime of the Basin and Range. Our detailed, three-dimensional analysis of seismic velocity, attenuation, anisotropy and stress is being used as an exploration tool for locating new sources of geothermal energy. Derivation of these models will allow us to propagate waves on a local scale so that we can perform full waveform inversions at high frequency. Our present method of waveform propagation is called the pseudo-spectral method and we have derived optimal boundary conditions for this purpose.

Bhattacharyya, J., Grosse, S., Lees, J.M. and Hasting, M., (1999). Recent earthquake sequences at Coso: Evidence for conjugate faulting and stress loading near a geothermal field. Bull. Seismol. Soc. Am., 89(3): 785-795.

Bhattacharyya, J. and Lees, J.M., (2002). Seismicity, stress and triggering in the Coso/Indian Wells Valley region. In: A.G. J., D. Walker and J.M. Bartley (Editors), Geologic Evolution of the Central Mojave Desert and Southern Basin and Range. Geological Society of America, pp. 243-258.

Feng, Q. and Lees, J.M., (1998). Microseismicity, stress, and fracture within the Coso geothermal Field, California. Tectonophysics, 289(1-3): 221-238.

Hough, S.E., Lees, J.M. and Monastero, F., (1999). Attenuation and source properties at the Coso geothermal area, California. Bull. Seismol. Soc. Am., 89(6): 1606-1619.

Lees, J.M., (1998). Multiplet analysis at Coso Geothermal. Bull. Seismol. Soc. Am., 88(5): 1127-1143.

Lees, J.M., (2004). Scattering from a fault interface in the Coso geothermal field. J. Volc. Geoth. Res., 130(1-2): 61-75.

Lees, J.M. and Wu, H., (1999). P-wave anisotropy, stress, and crack distribution at Coso Geothermal Field, California. J. Geophys. Res., 104(8): 17,955-17,973.

Lees, J.M. and Wu, H., (2000). Poisson's ratio and porosity at Coso Geothermal Area, California. J. Volc. Geoth. Res., 95: 157-173.

Wu, H. and Lees, J.M., (1996). Attenuation structure of the Coso Geothermal area, California, from pulse width data of P-wave. Bull. Seismol. Soc. Am., 86: 1574-1590.

Wu, H. and Lees, J.M., (1999). Three-dimensional P and S wave velocity structures of the Coso Geothermal Area, California, from microseismic traveltime data. J. Geophys. Res., 104: 13,217-13,233.