South american fault line shape file download

These data contain lines representing In October , we acquired an approximately 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 While LANFs have been documented globally, examples o. VS30, the time-averaged shear-wave velocity VS to a depth of 30 meters, is a key index adopted by the earthquake engineering community to account for seismic site conditions. VS30 is typically based on geophysical measurements of VS derived from invasive and noninvasive techniques at sites of interest.

Owing to cost considerations, as well as logistical and environmental concerns, V. A key input for probabilistic seismic hazard analysis PSHA is geologic slip rate data. Yet, no single database exists to house all geologic slip rate data used in these calculations. Here, we compile all geologic slip rates that are reportedly used in U. Although a new NSHM was released in 2. This Data Release contains co-seismic horizontal and vertical displacements of the Ridgecrest earthquakes derived from sub-pixel cross correlation of WorldView satellite optical imagery.

Skip to main content. Search Search. Natural Hazards. Apply Filter. Why are there so many faults in the Quaternary Faults Database with the same name? Many faults are mapped as individual segments across an area.

These fault segments are given a different value for name, number, code, or dip direction and so in the database each segment occurs as its own unique entity. For example, the San Andreas Fault has several fault segments, from letters a to h, and fault segment 1h has segments with age Why are there no faults in the Great Valley of central California? Since its formation, the Great Valley has continued to be low in elevation. Starting about 20 million years Why are there so many earthquakes and faults in the Western United States?

This region of the United States has been tectonically active since the supercontinent Pangea broke up roughly million years ago, and in large part because it is close to the western boundary of the North American plate. Since the formation of the San Andreas Fault system million years ago, the juxtaposition of the Pacific and North What is a "Quaternary" fault?

A Quaternary fault is one that has been recognized at the surface and that has moved in the past 1,, years 1. That places fault movement within the Quaternary Period , which covers the last 2. How do I find the nearest fault to a property or specific location? Bay Area Earthquake Alliance For faults in California and the rest of the United States as well as the latest earthquakes use the Latest Earthquakes Map : click on the "gear" icon in the upper-right corner scroll down to Map Layers, and turn on U.

Faults mouse How do I find fault or hazard maps for California? A DBF dBase file is a dbase format database table. Resolution The resolution is the size of each grid cell expressed as the length of one side of one square cell.

The units are in arc degrees, minutes or seconds. When the cell size is small e. The size in square meters varies with latitude.

The Topographic Maps and geographical information system GIS data provided in The National Map are pre-generated into downloadable products often available in multiple formats. Lidar point cloud data is also available over many areas of the US. See our Dataset List for a brief explanation of these products. Direct access is provided via browsable links through our Amazon's Cloud Browse site.

Training Video Lesson 4d.