Hypoinverse Station File Format
FORMAT OF THE HYPOINVERSE STATION FILE FOR FULL 12-LETTER (S-C-N-L) CHANNEL NAMES
The channel identifier consists of a 5-letter site code, a 2-letter network
code unique to the owner or operator of the network, a 3-letter component
or channel code, and a 2-letter location code. The net, component, and
location fields are optional to Hypoinverse, but space for these fields will
be reserved in all input and output files. The user of Hypoinverse may specify
(with the LET command) how many characters (counted from the left side) in
each field to use when matching names in station and phase files. Full use
of the fields will require 5, 2, 3, and 2 letters; minimum use will require
3, 0, 0 and 0 letters. Hypoinverse can use both a 1-letter (old USGS style)
and 3-letter (SEED style) component field. Space for both fields will be
reserved in all input and output files. Select whether to use the 1- or 3-letter
field for matching station and phase names with the LES command. It is
sometimes useful to keep the 1-letter component field for easier recognition by
analysts than the newer, more general 3-letter field.
Cols. Format Data
_____ ______ ____
1-5 A5,1X Station site code. The first character may not be a
number or the $ character.
7-8 A2,1X Station network code.
10 A1 Optional 1-letter component code for this channel.
11-13 A3,1X 3-letter component code for this channel.
15 A1 Station weight code (in units of 0.1) by which the weights
assigned each P & S phase are to be multiplied. Use the
digits 0-9 for the weight in tenths; "*" or "0" for no
weight; or any other character (including blank) for full
16-17 I2, 1X Latitude, degrees.
19-25 F7.4 Latitude, minutes.
26 A1 N or blank for north latitude, S for south.
27-29 I3, 1X Longitude, degrees.
31-37 F7.4 Longitude, minutes.
38 A1 W or blank for west longitude, E for east.
39-42 4X Reserved for elevation in m. Not used by HYPOINVERSE.
43-45 F3.1,2X Default period (in sec) at which the maximum amplitude
will be read for this station. Must be greater than 0.1.
If period is given on phase card, it overrides this value.
48 A1 Put a "2" or "A" here to designate this as an alternate
crust model station. Both alternate and primary crustal
models must be in use. Stations may also be tagged for
use with an alternate model in the delay file.
49 A1 Optional station remark field to copy to print output.
50-54 F5.2, 1X P delay (sec) for delay set 1.
56-60 F5.2, 1X P delay (sec) for delay set 2.
62-66 F5.2 Amplitude magnitude correction. If in the range +/-2.4, the
correction is included (by addition) in the amplitude
magnitude. If you don't want a station's magnitude used in
the event magnitude, use a correction of 5.0 plus the
actual correction. You can also assign a zero weight (see
67 A1 Amplitude magnitude weight code. Codes 0-9, "*" and blank
are the same as the P & S weight codes (col 15). The actual
magnitude weight used is the product of those on the station
and phase cards. See also col 62.
68-72 F5.2 Duration magnitude correction (works the same as the
amplitude magnitude correction).
73 A1 Duration magnitude weight code (works the same as
the amplitude weight code).
74 I1 Instrument type code for this station used to select the
appropriate response curve to derive an equivalent Wood
Anderson amplitude. Must be either 0, 1 or 2:
0: Standard Wood-Anderson torsion seismograph.
1: USGS standard (1 HZ geophone, .7 critical damping.)
2: Hawaii-type Sprengnether seismometer.
75-80 F6.2 Calibration factor for amplitude magnitudes, equal to the
peak-to-peak amplitude of a 10 microvolt RMS signal at 5
hz applied to the VCO and measured in mm on the
Develocorder film viewer. For instrument types 0 and 2
this should generally be 1.0. A cal factor of 0.0
signifies an unknown response for which no amplitude
magnitudes will be computed. If a cal factor is given on a
phase card it overrides this value. The VCO attenuation
may be given in place of the cal factor (see the ATN
command). An entire history of station attenuations with
the dates of attenuation changes may be read from a
separate file with the ATE command.
81-82 A2 2-letter location code.
Earthworm follows the SEED convention of allowed characters
(A-Z, 0-9, space). In apparent contradiction to the previous
statement, Earthworm uses the character '-' to represent
'space' in all Earthworm I/O. Just remember to think 'space'
when you see '-'. Lower case alphanumerics are not permitted.
The location code should always contain 2 characters, either
two alpha-numeric characters or two spaces ('--' or ' ').
The use of a single space (or '-') adjacent to an alpha-numeric
is not permitted.
Other details of hypoinverse configuration can be found in the complete
Hypoinverse documentation maintained by Fred Klein at:
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Updated 21 Feb 2007