Skip to main content
Advanced Search

Filters: Tags: Geophysics (X) > Date Range: {"choice":"week"} (X)

4 results (78ms)   

View Results as: JSON ATOM CSV
thumbnail
In October 2016, we acquired an approximately 15-km-long seismic profile along a linear transect across the East Bay region of the San Francisco Bay area. Our goal was to image previously unknown strands of the Hayward Fault zone and to better delineate the structure and geometry of the main trace of the Hayward Fault. Our profile started near the southern border of San Leandro, California at the San Francisco Bay shoreline, trended ENE through the northern edge of Castro Valley, California, and ended approximately 5 km WSW of San Ramon, California. The data were analyzed using refraction tomography modeling, reflection processing, and guided-wave analysis. The analyzed data are presented in separate reports by...
thumbnail
The 2018 eruption of Kīlauea Volcano on the Island of Hawaiʻi saw the collapse of a new, nested caldera at the volcano’s summit, and the inundation of 35.5 square kilometers (13.7 square miles) of the lower Puna District with lava. Between May and August, while the summit caldera collapsed, a lava channel extended 11 kilometers (7 miles) from fissure 8 in Leilani Estates to Kapoho Bay, where it formed an approximately 3.5-square-kilometer (1.4-square-mile) lava delta along the coastline. Rapidly-deployed remote sensing techniques were vital in monitoring these events. Following the eruption, the U.S. Geological Survey (USGS) contracted the acquisition of rigorous airborne lidar surveys of Kīlauea Volcano's summit,...
thumbnail
Airborne electromagnetic (AEM), magnetic, and radiometric data were acquired November 2018 to February 2019 along 16,816 line-kilometers (line-km) over the Mississippi Alluvial Plain (MAP). Data were acquired by CGG Canada Services, Ltd. with three different helicopter-borne sensors: the CGG Canada Services, Ltd. Resolve frequency-domain AEM instrument that is used to map subsurface geologic structure at depths up to 100 meters, depending on the subsurface resistivity; a Scintrex CS-3 cesium vapor magnetometer that detects changes in deep (hundreds of meters to kilometers) geologic structure based on variations in the magnetic properties of different formations; and a Radiation Solutions RS-500 spectrometer that...


    map background search result map search result map Marine magnetic data from Point Sur to Piedras Blancas, central California, 2011 Airborne EM, magnetic, and radiometric survey data Digital elevation model of Kīlauea Volcano, Hawaiʻi, based on July 2019 airborne lidar surveys Data Release for the 2016 East Bay Seismic Imaging Investigation of the Hayward Fault Zone Data Release for the 2016 East Bay Seismic Imaging Investigation of the Hayward Fault Zone Digital elevation model of Kīlauea Volcano, Hawaiʻi, based on July 2019 airborne lidar surveys Marine magnetic data from Point Sur to Piedras Blancas, central California, 2011 Airborne EM, magnetic, and radiometric survey data