Chen, Wang-Ping
2022-11-09 02:15:57
Dear Colleagues:
We'd like to call your attention to this workshop, to be held on the Saturday before the 2022 AGU annual meetings in Chicago. If you have already registered for the meeting, you can always make changes by going to your personal portal for the meeting.
Hope to see some of you there,
Wang-Ping Chen
***
In comparison with conventional approaches using manmade sources, Virtual Deep Seismic Sounding (VDSS) offers a simple, robust, and low-cost alternative to investigate seismic properties of the crust and the upper mantle. The key in VDSS is that it utilizes strong, deep-penetrating signal from the conversion of shear- to compression-wave near each seismic station as a virtual source of seismic reflection. So, each recording of an earthquake at any seismic station carries its own, free seismic source for probing the lithosphere near that station.
Recent advances in VDSS, including the use of both post-critical and pre-tical reflections, and auxiliary seismic phases, not only determines bulk crustal properties such as compression- and shear-wave speeds, and thickness, but also constrain the speed and anisotropy of the compression-wave in the uppermost mantle (in lieu of the phase Pn). Furthermore, the method has the capability of investigating additional interfaces within the lithospheric mantle and the crust. The robust, simple nature of VDSS enables individual scientists or small research groups to make significant progress by using the voluminous, public domain data from nature earthquakes.
In this workshop, we plan to provide enough background and techniques that will enable participants to become comfortable enough with VDSS to apply this method in their own research applications. With a mixture of lectures and hands-on sessions, the participants will make their own long seismic profiles using data from a single, deep-focus earthquake. We will build on this foundation to illustrate how to use numerous shallow earthquakes that facilitates the investigation of a wide range of seismic properties of the crust and the lithospheric mantle, including but not limited to the construction of 3-D crustal thickness maps.
This one-day workshop requires only basic knowledge of seismology and digital signal processing but assumes functional proficiency of the Linux/Unix OS. Each participant must have her own Linux/Unix-enabled laptop computer to perform hands-on exercises throughout the day.
Agenda
December 10, 2022 (Saturday) 08:00 - 16:00
McCormick Place, S105bc
Morning (08:00 - 12:00), light breakfast and coffee about 30 min. before 08:00
Introduction and historical perspective of VDSS (30 min. + 10 min. break; presenter: Wang-Ping Chen)
Basic Background (40 min. + 10 min. break; presenter: Chunquan Yu)
Applications on Martian Data (40 min. + 10 min. break; presenter: Jiaqi Li)
VDSS in heterogeneous medium (40 min. + 10 min. break; presenter: Tianze Liu)
Hands-on Session 1: Software installation (40 min. + 10 min. break; TA: Sifang Chen, Qing Chen, Jiaqi Li, Tianze Liu)
-- Lunch Break (12:00 – 14:00) Box lunch
Afternoon (14:00 - 16:00)
Hands-on Session 2: Data acquisition and processing, constructing a VDSS profile using a deep earthquake (50 min. + 10 min. break; TA: Sifang Chen, Qing Chen, Jiaqi Li, Tianze Liu)
Recent developments: Move-out analysis, utilization of other seismic phases, constraining the speed and anisotropy of P-waves in the uppermost mantle, intra-crustal and mantle interfaces (40 min. + 10 min. break; presenter: Wang-Ping Chen)
Instructors:
Wang-Ping Chen, University of Illinois, Urbana-Champaign & China University of Geosciences (Wuhan), email: wpchen<at>illinois.edu
Chunquan Yu, Southern University of Science and Technology (SUSTech), China, email: yucq<at>sustech.edu.cn
Jiaqi Li, University of California, Los Angeles, email: Jli<at>epss.ucla.edu
Tianze Liu, University of California, San Diego, email: til008<at>ucsd.edu
Sifang Chen (TA), University of Chicago, email: sfchen<at>uchicago.edu
Qing Chen (TA), China University of Geosciences (Wuhan), email: qchen1023<at>cug.edu.cn
We'd like to call your attention to this workshop, to be held on the Saturday before the 2022 AGU annual meetings in Chicago. If you have already registered for the meeting, you can always make changes by going to your personal portal for the meeting.
Hope to see some of you there,
Wang-Ping Chen
***
In comparison with conventional approaches using manmade sources, Virtual Deep Seismic Sounding (VDSS) offers a simple, robust, and low-cost alternative to investigate seismic properties of the crust and the upper mantle. The key in VDSS is that it utilizes strong, deep-penetrating signal from the conversion of shear- to compression-wave near each seismic station as a virtual source of seismic reflection. So, each recording of an earthquake at any seismic station carries its own, free seismic source for probing the lithosphere near that station.
Recent advances in VDSS, including the use of both post-critical and pre-tical reflections, and auxiliary seismic phases, not only determines bulk crustal properties such as compression- and shear-wave speeds, and thickness, but also constrain the speed and anisotropy of the compression-wave in the uppermost mantle (in lieu of the phase Pn). Furthermore, the method has the capability of investigating additional interfaces within the lithospheric mantle and the crust. The robust, simple nature of VDSS enables individual scientists or small research groups to make significant progress by using the voluminous, public domain data from nature earthquakes.
In this workshop, we plan to provide enough background and techniques that will enable participants to become comfortable enough with VDSS to apply this method in their own research applications. With a mixture of lectures and hands-on sessions, the participants will make their own long seismic profiles using data from a single, deep-focus earthquake. We will build on this foundation to illustrate how to use numerous shallow earthquakes that facilitates the investigation of a wide range of seismic properties of the crust and the lithospheric mantle, including but not limited to the construction of 3-D crustal thickness maps.
This one-day workshop requires only basic knowledge of seismology and digital signal processing but assumes functional proficiency of the Linux/Unix OS. Each participant must have her own Linux/Unix-enabled laptop computer to perform hands-on exercises throughout the day.
Agenda
December 10, 2022 (Saturday) 08:00 - 16:00
McCormick Place, S105bc
Morning (08:00 - 12:00), light breakfast and coffee about 30 min. before 08:00
Introduction and historical perspective of VDSS (30 min. + 10 min. break; presenter: Wang-Ping Chen)
Basic Background (40 min. + 10 min. break; presenter: Chunquan Yu)
Applications on Martian Data (40 min. + 10 min. break; presenter: Jiaqi Li)
VDSS in heterogeneous medium (40 min. + 10 min. break; presenter: Tianze Liu)
Hands-on Session 1: Software installation (40 min. + 10 min. break; TA: Sifang Chen, Qing Chen, Jiaqi Li, Tianze Liu)
-- Lunch Break (12:00 – 14:00) Box lunch
Afternoon (14:00 - 16:00)
Hands-on Session 2: Data acquisition and processing, constructing a VDSS profile using a deep earthquake (50 min. + 10 min. break; TA: Sifang Chen, Qing Chen, Jiaqi Li, Tianze Liu)
Recent developments: Move-out analysis, utilization of other seismic phases, constraining the speed and anisotropy of P-waves in the uppermost mantle, intra-crustal and mantle interfaces (40 min. + 10 min. break; presenter: Wang-Ping Chen)
Instructors:
Wang-Ping Chen, University of Illinois, Urbana-Champaign & China University of Geosciences (Wuhan), email: wpchen<at>illinois.edu
Chunquan Yu, Southern University of Science and Technology (SUSTech), China, email: yucq<at>sustech.edu.cn
Jiaqi Li, University of California, Los Angeles, email: Jli<at>epss.ucla.edu
Tianze Liu, University of California, San Diego, email: til008<at>ucsd.edu
Sifang Chen (TA), University of Chicago, email: sfchen<at>uchicago.edu
Qing Chen (TA), China University of Geosciences (Wuhan), email: qchen1023<at>cug.edu.cn
