1 / 5

Student Researcher: Kevin Kwong Thesis Advisor: Keith Koper

Large Earthquake Rupture Imaging Using the Back-Projection Technique and Improving the Array Response Function. Student Researcher: Kevin Kwong Thesis Advisor: Keith Koper. Ishii et al. 2005. Imaging Earthquake Rupture From Back-Projecting Body Waves.

oona
Télécharger la présentation

Student Researcher: Kevin Kwong Thesis Advisor: Keith Koper

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Large Earthquake Rupture Imaging Using the Back-Projection Technique and Improving the Array Response Function Student Researcher: Kevin Kwong Thesis Advisor: Keith Koper Ishii et al. 2005

  2. Imaging Earthquake Rupture From Back-Projecting Body Waves • The back-projection method traces seismic waves back to their original rupture source. • We use specifically teleseismic P waves • We locate sources of rupture by looking at regions in space and time that show relative high amplitudes • Back-projection imaging resolve important rupture parameters and details that can be used to inform public and tsunami warning systems Ishii 2011 Peter Shearer 2009

  3. Resolving Complex Rupture Details • We stack the seismograms and sum the energy to a beam to resolve local maximum energy releasing peaks Koper et al., 2011

  4. Imaging Artifacts • Artifacts in time and space can complicate back-projection images • The smearing and leakage of energy in space and time is a big concern that relates in how the array distorts the image and results in a less optimal Array Response Function (ARF) IRIS back projection results for 2010 Chile event

  5. Mitigating Artifacts • We will devise methods to suppress imaging artifacts and deconvolve back-projection images • Looking at artifacts in back-projected aftershock events • Station weighting for resolving optimal array response functions Keith Koper , Personal Communication

More Related