xm_hypo


NAME

xm_hypo - Hypocenter format for the Geotouch program

SYNOPSIS

xm_hypo - Input File Format

DESCRIPTION

The default format for hypocenters in Geotouch is UW pickfile
format for hypocenters and focal mechanisms.

New: Now you can import hypoinverse and CalTech Catalogue
hypocenters into Geotouch. See below.

Importation of fpfit output is still not available.


FORMAT

Can have Several Source Files input. Use: -S file1 -S file2.....
(S = Source)

The hypocenter format is determined by env variable: XMA_HYPO_FORMAT
which can be set to any of: { UW , uw , hypoinverse , cit , CIT }
Or it can be changed on the fly on the command line by including
the suffix on the -S option, e.g.
-Suw files -Scit file ...etc.

There is now a new format which is an augmented UW file
card that include the unique name of the file
added on the end, separated by a colon (:).
This allows you to access a database of digital waveforms
(or other information) which is accessed via the unique identification.



e.g.
setenv XMA_HYPO_FORMAT hypoinverse

the default is UW format, described below.
cit = CalTech Catalog format
hypoinverse = (one variant of) hypoinverse format
----------------------------------------

Hypocenters are normally screened spatially to limit
the number stored in memory. Normally, hypocenters
located outside of the window surrounding the target
are excluded. To force inclusion of all hypocenters
into memory use the command line option

-force_source

This will force all hypocenters to be included (no spatial selection).
This is important to use when applying the "connect" option on the Source menu.
This option requires that the source files being connected
have 1-1 correspondence.


---------UW FORMAT-----------------------

ident sec lat long depth mag np ns gap delt err rms qq mod
A 9005051858 24.25 36N0127 117W5001 2.50 0.0 05/005 266 01 0.05 00.2AD F1
A 9005061311 7.80 36N0275 117W5144 2.02 0.2 06/005 304 05 0.03 00.3AD F1
A 9005061308 47.18 36N0005 117W4801 2.07 0.0 05/005 200 00 0.05 00.2AD F1
A 9005061309 5.68 36N0131 117W5024 2.08 0.0 06/006 273 02 0.03 00.1AD F1

See Details below.
Lat and Long are in the format ddNmmmm where mmmm is minutes*100

N can be either N or S
W can be either W or E

#################################
FOCAL-MECHANISM file is also in UW format: see xm_focal

Can have Several focal Mechanism Files input. Use: -F file1 -F file2.....

It is organized as pairs of A and M cards.
The A cards are the same as those described above.
An example of an A & M-card pair is:

A 9204230225 29.57 33N5728 116W1868 12.23 3.3 82/000 63 7 0.18 0.2BA CN
M F 345 45 G 255 90 U 165 45 V 435 0 P 219 29 T 470 30

M: strk1 dip1 strk2 dip2 pol1 dip1 pol2 dip2 p-axis pdip taxis t-dip

These pairs of cards must stay together and there may
be many concatenated in one file.
The first pair of strk-dip represent, by convention,
the focal plane and the second the auxiliary plane.
These can be switched by running a utility called switchfoc,
or they can be switched in Geotouch. See accelerator keys.
#################################
EXTENDED FOCAL-MECHANISM file is also in UW format:
An extended Focal Mechansim record includes a LAT-LON
added to the end of the M card.
This designated the position of the "exploded" location of the focal mechanism.
which can be saved with the menu-item: Dump ext under the FOcal menu.
After saving this file, future calls to Geotouch with the -Fext filename
will read in the focal mechanisms and their location for plotting after
hitting the "e" button.


----------------------------------------------------------
Details of A-card - UW FORMAT


A The header line begins with a 'A' in the first col and
contains all of the date-time information for the
event, as well as location, magnitude and some quality
information. The approved "types" which can appear in
column 2 are: X- Known explosion, P- Probable explo-
sion, F- Felt event, T- Teleseisms, H- Hand picked
(previous 'types' take precedence), L- Low frequency
volcanic, C- Centralia explosion, R- regional earthquake.

Quality factors (UW) :

Q1
C => rms <0.5 err <5.0
B => rms < 0.3 err < 2.5 errz<5
A => rms <0.15 err< 1.0 errz < 2

Q2
C => gap < 180 dmin < 50
B => gap < 135 dmin < max(2*depth,5)
A => gap < 90 dmin < max(depth,5)


Type,Year,Month,Day,Hour,Min,Sec,Lat,NS,Latmin*100,Longitude,EW,Lonmin*100
Depth,Fix,Magnitude,Numpobs,Numsobs,Gap,Mindelta,RMS,ERR,Q1,Q2,Velmodel
FORMAT('A',A1,5I2,F6.2,I3,A1,I4,I4,A1,I4,
F6.2,A1,F4.1,I3,'/',I3,I4,I3,F5.2,f5.1,2A1,1x,A2)
ATYYMMDDHHMM SS.SS LLNMMMM LLLWMMMM DD.DD* M.M NN/NNN GGG DD R.RR EE.EQQ VV


M Mechanism line which summarizes the focal mechanism for
this event. Up to 6 fix format packets in pairs for
nodal planes (F,G), slip vectors (U,V), and major
stress axes (P,T).
In format below AAA is the DOWN DIP AZIMUTH strike
of a plane measured clockwise from north eastward.
PP
is the dip measured from the horizontal downward.
For example a plane with a strike of N55E
and dipping 30 to the SSE is AAA=145 PP=30.

Plane#1,Plane#2,Slip#1,Slip#2,P-axis,T-axis,Comment
FORMAT('M',6(1x,A1,1x,I3,1x,I2),'C',A)
M F AAA PP G AAA PP U AAA PP V AAA PP P AAA PP T AAA PP C comment
-----------------------------------------------------------------------
hypoinverse example:
8005190858461646 1165122 1231 95219 17 62 2 29 0 0 190 0 0 19019JJJ 40 17 40 40 0


cit catalog example:
1977 1 1 20 22 52.44 34 3.32-116 31.53 C 0.0 5.63 0 0.00 0


SEE ALSO

REFERENCES

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