Status report of propagation models: Middle East and North Africa (S5.3)

Thumbnail image of item number 1 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Thumbnail image of item number 2 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Thumbnail image of item number 3 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Thumbnail image of item number 4 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Showing 1-4 of 12 pages in this report.

PDF Version Also Available for Download.

Description

An improved understanding of the influence that tectonic structure has on regional seismic phases is needed to improve the current performance of regional discriminants and their transportability to the Middle East and North Africa. In the case that the crustal structure can be approximated by a flat layered laterally invariant medium, layer-cake reflectivity modeling can be used to obtain an accurate representation of regional phases. However, a laterally heterogeneous crust is just as common as a layered cake structure and in this case large variations in regional phase amplitudes are not uncommon. For instance, it has been shown that rough ... continued below

Physical Description

9 p.

Creation Information

Schultz, C.A.; Patton, H.J. & Goldstein, P. November 1, 1995.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Authors

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

An improved understanding of the influence that tectonic structure has on regional seismic phases is needed to improve the current performance of regional discriminants and their transportability to the Middle East and North Africa. In the case that the crustal structure can be approximated by a flat layered laterally invariant medium, layer-cake reflectivity modeling can be used to obtain an accurate representation of regional phases. However, a laterally heterogeneous crust is just as common as a layered cake structure and in this case large variations in regional phase amplitudes are not uncommon. For instance, it has been shown that rough surface topography and undulations in the Moho can cause the transfer of energy between various surface wave modes and between surface waves and body waves greatly increasing the potential variability of seismic phases. Larger scale structure such as thickening or thinning of the crust can also greatly affect phase propagation. In some instances, changes between different tectonic regions such as that which occurs at a continental-oceanic boundary can completely block phases such as Lg rendering certain discriminants useless. In addition to structure along the path, lateral structure and free surface topography near the source and receiver can cause complex scattering effects with strong directional, frequency, and near-field effects. Given that the Middle East and North Africa cross many different tectonic boundaries, the authors are using numerical propagation models to understand how the relevant tectonic features affect the propagation of primary discriminant phases.

Physical Description

9 p.

Notes

OSTI as DE96010760

Source

  • Other Information: PBD: Nov 1995

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Other: DE96010760
  • Report No.: UCRL-ID--122569
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/231386 | External Link
  • Office of Scientific & Technical Information Report Number: 231386
  • Archival Resource Key: ark:/67531/metadc670931

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this report?

Digital Files

When

Dates and time periods associated with this report.

Creation Date

  • November 1, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

Description Last Updated

  • Feb. 23, 2016, 12:28 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 3
More Statistics

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Thumbnail image of item number 2 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Thumbnail image of item number 3 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.
Thumbnail image of item number 4 in: 'Status report of propagation models: Middle East and North Africa (S5.3)'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Schultz, C.A.; Patton, H.J. & Goldstein, P. Status report of propagation models: Middle East and North Africa (S5.3), report, November 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc670931/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.