Purpose

It is intended to create a shapefile with the geometry and the slip distribution provided by USGS for the most important earthquakes.

Technical Note

The USGS earthquake website provides, soon after the major earthquakes, a distribution of the fault dislocation, based on the inversion of seismic waves. This panel allows to create an Elastic Dislocation source from the USGS website. This slip distribution is available only for the significant earthquakes; when available for a given event, it can be found under the "Scientific & Technical Information" tab, following the "Finite Fault Model" and then the “SUBFAULT FORMAT” links, at the page bottom. In the panel, the "USGS source" field can contain either the webpage URL or the path of the text file, after the download.

Here below there are some examples:

1.December 26, 2004, M 9.1 (Sumatra):

•Event page

•Fault model

2.February 27, 2010, M 8.8 (Chile):

•Event page

•Fault model

3.February 27, 2010, M 8.8 (Chile):

•Event page

•Fault model

The Fault Patches model, stored in a shapefile, can be used in the Linear Inverion, Forward modeling and CFF stress transfer panels.

Note: as the modeling can be performed only with projected cartographic systems, the shape file with the USGS slip distribution is automatically created in the UTM - WGS84 projection, adopting the zone that best fits the involved area.

Parameters

USGS source (URL or .txt)

Webpage URL or text file with the USGS slip distribution.

Output shapefile

Shapefile containing the Elastic Dislocation source, in UTM-WGS84 co-ordinates (.dbf, .shx, .prj).

General Functions

Start

Start of the processing.

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Help

Specific help document section.

Interferometry - Displacement Modeling - Tools - Import USGS Slip Distribution

Interferometry - Displacement Modeling - Tools - Import USGS Slip Distribution

Purpose