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Now showing items 21-30 of 42
Laboratory analysis of restrenghtening on simulated faults
(Massachusetts Institute of Technology, 1999)
Seismic data show that stress drop increases with the logarithm of earthquake recurrence interval (1-5 MPa per decade time). If stress drop is taken as a proxy for fault strength, then the data suggest that faults restrengthen ...
GPS kinematic positioning for the airborne laser altimetry at Long Valley, California
(Massachusetts Institute of Technology, 1999)
The object of this thesis is to develop a reliable algorithm and software for em-level kinematic GPS (Global Positioning System) data analysis. To assess the accuracy of the software, we use it to determine the trajectory ...
Analysis and interpretation of clustered microseismicity at geothermal and petroleum reservoirs
(Massachusetts Institute of Technology, 1999)
This thesis presents the analysis and interpretation of four microearthquake clusters near geothermal and petroleum reservoirs. One cluster was induced during a controlled hydraulic fracture experiment conducted by Atlantic ...
Surface and bottom boundary layer dynamics on a shallow submarine bank : southern flank of Georges Bank
(Massachusetts Institute of Technology, 1999)
The thesis investigates the circulation at a 76-m deep study site on the southern flank of Georges Bank, a shallow submarine bank located between the deeper Gulf of Maine and the continental slope. Emphasis is placed on ...
Wind-driven circulation on a shallow, stratified shelf
(Massachusetts Institute of Technology, 1999)
A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic ...
Ground penetrating radar characterization of geologic structure beneath the Aberjona wetland
(Massachusetts Institute of Technology, 1999)
Ground penetrating radar (GPR) surveys are performed to determine geologic structure and to assist in the characterization and eventual modeling of ground water flow beneath the Well-H region of the Aberjona River in Woburn, ...
Coupled length scales in eroding landscapes
(Massachusetts Institute of Technology, 1999)
We propose a method to study natural topography by means of local transform. A nonlinear local transform Alc[h(x)] of the elevation field h(x) is used to determine a director field of anisotropy a(x). The director field ...
Numerical simulation of primary petroleum migration
(Massachusetts Institute of Technology, 1999)
A numerical simulation is presented for the generation and movement of petroleum in a single layer of source rock, a process also know as primary migration. The equations governing the system are derived from principles ...
Wobbly winds in an ice age : the mutual interaction between the great continental ice sheets and atmospheric stationary waves
(Massachusetts Institute of Technology, 1999)
The ice sheets of the last glacial maximum (about 21 thousand years ago) covered a significant fraction of the high latitude land mass, reached up to 3km in height, and had length scales of thousands of kilometers. They ...
Calculating the global flux of carbon dioxide into groundwater
(Massachusetts Institute of Technology, 1999)
In this research, the global annual flux of inorganic carbon into groundwater was calculated to be 4.4 GtC/y, with a lower bound of 1.4 GtC/y and an upper bound of 27.5 GtC/y. Starting with 44 soil PCO2 measurements, the ...