Normal Mode (Mineos Package) Tutorial

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Normal Mode (Mineos Package) Tutorial

• Author Guy Masters
• I/O and documentation Misha Barmin

• Background and theory of normal mode synthetic
• seismograms provided by Guy this AM.
• Brief overview of the code 4 programs, I/O flow.
• To Run the Code Inputs needed, CSS data base
• description Antelope interface.
• Example outputs.
• Utilities e.g., conversion to SAC waveforms.
• Users run programs.. Led by Misha..

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Status Documentation
Status of the code the code is being Beta tested
right now. Version 1.0 has not been completely
bench-marked. The official version will become
available from CIG (www.geodynamics.org) in about
a month. Please dont take the code home. If you
do take the code home, DO NOT DISTRIBUTE IT, and
replace it with the official version soon to
become available from CIG.
Documentation you should have Mineos Version
1.0 (Draft) Users Manual Tutorial The Mineos
Package
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2. The Code
Four programs in the Mineos Package

• Minos_bran -- computes the eigenfunctions and
• eigenfrequencies.
• Eigcon -- renormalizes the eigenfunctions and
• outputs into an extension of CSS. (.eigen
  relation)

Eigenfunction System
Green -- computes Green functions.
(.wfdisc) Syndat -- computes the synthetic
seismograms. (.wfdisc)
Synthetic Seismogram System
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2. I/O Flow
Eigenfunction System
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2. I/O Flow
Synthetic Seismogram System
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3. To Run the Code Inputs Needed

• 1D model. (four models provided for the tutorial)
• Stationchannel list .sitechan .site from
  CSS3.0.
• CMT solution cmt_event -- unformatted ascii
  file.
• (Similar to Guys locale file.)

• To create .sitechan .site
• Research comparing with data, use a SEED
  volume
• and run RDSEED or sd2db or seed2db.
• Teaching utility simpledit helps.

To create cmt_event Simple unformatted file.
Create by hand. (A later version will have a
utility for converting from Harvard CMT file.)
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Center for Seismic Studies 3.0 Relational Data
Base Schema
Relational Data Base Terminology File
Relation Row tuple Specific set of
columns Field Connecting tables Join

• Disadvantage of utilizing CSS3.0
• Although in ascii, the relations are formatted
  files and
• format must be followed religiously.
• Relevant information sometimes requires multiple
  files.
• (e.g., .site .sitechan .origin, .centryd,
  .moment)
• Advantage
• Core schema is well defined and documented.
• Processing/Viewing software exists (Antelope).
• Format interconversion software exists.
• Easily extendable.

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Center for Seismic Studies 3.0 Relational Data
Base Schema
Our Approach hybrid -- take core relations from
CSS3.0 minimally extend it, but also
represent event information with a simple
unformatted ascii file.
.wfdisc --gt waveforms on disk
Extension .eigen relation --gt eigenfunctions on
disk.
Event information unformatted file event_cmt.
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4. Example Outputs
Outputs Eigcon .eigen relation --gt
eigenfunctions on disk. Utility preigen prints
chosen eigenfunctions. Green .wfdisc relation
--gt multiplexed Green functions on
disk. Syndat .wfdisc relation --gt synthetic
seismograms on disk. Units ground motion
(nm/sec), no instrument responses.
Waveforms viewable with Antelopes dbe or dbpick.
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Example event in S. China, spheroidal
toroidal, 0 lt n lt 150, 0 lt f lt 166 mHz, 0 lt l lt
10000. These results are in directory /Demo1
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Phase arrivals generated by dbpick using iaspei
model.
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Phase arrivals generated by dbpick using iaspei
model.
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5. Utilities
simpledit -- to create .site .sitechan
tables. preigen -- prints chosen
eigenfunctions. create_origin -- creates an
.origin table from a cmt_event table. css2sac --
reads .origin, .site, .sitechan, and .wfdisc
and creates SAC waveform files with fully
populated headers.
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