A two-step physical algorithm that simultaneously retrieves geophysical parameters from Moderate Resolution Imaging Spectroradiometer (MODIS) measurements was developed. The retrieved geophysical parameters include atmospheric temperature-humidity profile, surface skin temperature, and two surface emissivities within the shortwave (3-5-microm) and the longwave (8-14.5-microm) regions. The physi...

Different methods of lithology predictions from geophysical data have been developed in the last 15 years. The geophysical logs used for predicting lithology are the conventional logs: sonic, neutron-neutron, gamma (total natural-gamma) and density (backscattered gamma-gamma). The prompt gamma neutron activation analysis (PGNAA) is another established geophysical logging technique for in situ e...

A magnetic gradiometer survey was undertaken over an area of approximately 1.3ha, centred on the upstanding remains of the St Lythans chambered tomb (NPRN 227289). The survey is interpreted as showing multiple, often rather subtle, sets of lineations representing both joints in the underlying bedrock and relatively recent agricultural activity. Historical use of the site is shown by a former fi...

A survey to locate all potential pollution sources in a watershed can be overwhelming in terms of the commitment of capital, equipment, and manpower. For this reason, alternative methods were sought that could lessen the time and cost of these initial watershed surveys. In this paper, airborne thermal infrared (TIR) imaging and geophysical techniques, such as electromagnetic conductivity and ve...

In this report we introduce the development of the WDC for Geophysics, Beijing included our activities in the electronic Geophysical Year (eGY) and in the transition period from WDC to WDS. We also present our future plans. We have engaged in the development of geophysical informatics and related data science. We began the data visualization of geomagnetic fields in the GIS system. Our database...

Atmospheric electricity is a venerable topic of geophysical science, dating back to the 1750s when Franklin and Dalibard established the presence of electricity in thunderstorms. Subsequently even fine conditions were observed to be electrified, and a downward vertical atmospheric electric field of magnitude ~100V/m observed near the surface during fair weather conditions. The origin of the “fa...

THE recent organization by the American Geophys-ical Union of two cooperative committees of national scope, the Special Committee on the Geophysical and Geological Study of Ocean Basins, under the chair-manship of Professor R. M. Field, and the Special Committee on the Geophysical and Geological Study of Continents, under Professor W. T. Thom, points unmistakably to a growing realization of the...

When conducting an investigation of the subsurface a geoscientist will often locate specific borehole geophysical data for the area of study. This process of locating spatially where the geophysical logs have been conducted and what specific parameters have been run in each logging suite can often be difficult and take the investigator several hours or even days depending upon the size of the s...

Lunar Science: The Moon provides a unique opportunity to study fundamental questions about the origin and evolution of the inner solar system. While it is widely believed that the Moon was created by the collision of a large object with the Earth during early planetary formation, this has not been conclusively proven. Furthermore, the mechanisms and processes by which this may have occurred are...

16 In geophysical electromagnetic methods, time-varying magnetic fields are measured at Earth’s surface that are produced by electrical currents inside the Earth in order to constrain subsurface conductivity and geological structure. These methods are widely used for mineral exploration and environmental investigations, and are increasingly being used in hydrocarbon exploration as well. Forward...