West Coast/Alaska Tsunami Warning
Center
Operations Manual
NOAA/NWS/WCATWC
Palmer,
http://wcatwc.arh.noaa.gov
Section
4.1.5 – hypo_display
Last
Updated: 5/2007
Date
Written: 3/2001
Development Language: MicroSoft
C/C++ v7.0 using WinAPI
Necessary Rings:
Input Ring – HYPO_RING;
reads TYPE_HYPOTWC format messages
Output
Ring - PICK_RING; writes TYPE_PICKTWC format messages
Necessary Data Files:
StaFile - picker
configuration file
StaDataFile - seismometer
location, elevation, etc.
RTPFile
- P-data file to share wth WC/ATWC program LOCATE
QuakeFile - List of
automatically located quakes
DiskWritePath and FileSuffix: - Disk data path and suffix
Initialization File:
hypo_display.d
- read on module start-up
Module Description:
This module takes hypocenter information (in TYPE_HYPOTWC format) from the
Input Ring and displays it on a window. The module displays hypocenter
information and waveforms on an easy to read and interact with display.
Hypocenters computed in loc_wcatwc are matched with P-data files. The expected
P-time for each channel listed in StaFile is computed, seismic data read from
disk, and displayed in order of epicentral distance on a child window. P-picks
used in the automatic location are shown on the seismic data display and can be
altered interactively. P-picks which are changed or added are then sent back to
the PICK_RING to update the P-buffer in loc_wcatwc. Future locations for this
quake in loc_wcatwc will utilize the new and altered P-picks. As P-picks are
changed or added here, Mb, Ml, and Mwp parameters are computed from the signal
and reported with the P to PICK_RING.
Program Controls:
This module has a Windows graphical interface.
Due to this interface, the module will only compile and run under Windows (NT, 2K,
and XP). The display is broken into three sections. The top section lists the
last MAX_QUAKES locations written to the InRing. Only the latest version of
each is shown. Information is listed about each quake, such as: ID, version,
O-time, date, lat, lon, depth, residual, azimuth, # stns., and magnitude data.
When a quake is left-clicked, the quake's associated waveforms are shown below.
This child window displays all waveforms for stations listed in StaFile ordered
by epicentral distance with the expected P-time 25% from left to right of the
child window. P-times are shown with red lines on this display. P's can be
added or adjusted here by left-clicking on the trace, and the quake re-located
either automatically by loc_wcatwc or interactively in the WC/ATWC program
LOCATE. Just above this box is a littoral location and preferred magnitude for
the earthquake.
Mouse Buttons:
Left Button on top section list box displays
appropriate traces in lower box.
Left Button in trace display window adjusts P-picks
in file shared with LOCATE and with picks used in loc_wcatwc.
Left Button on station name in trace display window
removes that station from further locations in loc_wcatwc and from the file
shared with LOCATE.
Menu
Options:
Force Location: Drops a “note” in PICK_RING so that loc_wcatwc will
recompute location for quake being evaluated.
Mwp Display: Create child window to show integrated broadband
signal used in Mwp computations.
Recompute
Mwp: Specify maximum integration
window and signal-to-noise ratio use in Mwp computations.
Refresh: Re-paint the screen.