Windows Application For Listing Earthquakes In and Around India
Setting The Environment Variables
The application allows the user to list date, times and hypocentral data (latitude, longitude and depths) along with the magnitude. Data up to the year 1964 have been catalogued from various catalogues in India and published literature. After 1964 these are mostly based on the USGS data base. The data cover latitudes between 5 and 40 degrees North and longitude 65 and 95 degrees East. However, these limits might have varied, and in case of the area under consideration falls towards the boundaries, it is advised that the original data base is consulted again.
Earthquake Data are arranged in convenient size files. These files have been named :
EQTO64.DAT
EQ65_76.DAT
EQ77_89.DAT download these files
EQ90_99.DAT
EQ00_05.DAT
The names of the files are indicative of what the files contain. With passage of time more and more events will be added to the list. A user can add additional data to the list by downloading from the USGS database:
http://wwwneic.cr.usgs.gov/neis/epic/epic_rect.html
The downloaded data will need some editing for compatibility with the EQ ASCII files.
The application is named Evt.EXE. After Evt is typed on the command line the applications Window will open as shown below:
The selection Menu is as shown below
After cliking the Selections Menu, the user will be presented a dialog box for selecting the output file name. The user has the choice to either accept the default output file name, or enter a chosen file name.
After the output file is selected the earthquake data file (or input file) is to be selected. After clicking the input file item on the Selections menu a dialog box appears along with a list box listing all .dat files in the directory. One of these can be selected by highlighting it. It is necessary to keep the data files in the same directory where the .exe file is located.
Events are to be selected for a certain range of locations, time or magnitude then the user may select "Selection Events" on the Selections menu. This will present a dialog box shown below:
The selection values are read as integers, hence the multiplying factors are given. No decimals are accepted by the application. After the user clicks OK on this dialog box, the evnts are displayed in a scroll window as shown below:
These events are also listed in the output file, which can be copied, printed and even edited.
The source code and the make file of the application are included in the download of the application. Though the scope of the application is limited only to listing and selecting events, and modifications are unlikely to become the need in this case, an important objective of the inclusion of this code is to catalogue the window procedures: the basic window parameters, input/output and scrolling the window. In case a user wants to experiment with any of the features the application can be modified and rebuilt. It can be done either on the command line or in the Microsofts Developer Studio.
For building the application the application on the command line the make file is used. The application is built by typing
NMAKE EVT.MAKE
on the command line. However, before building the application in this manner, the various variables of the MAK file, and the information on the paths of the various libraries, need to be added to the computing environment. The variables are specified by including these to the autoexecute file by adding the following statements.
Setting The Environment Variables
REM
-------------------------------------------------------------------------
REM
MSC.BAT -- Set up environment for Microsoft C/C++ 5.0 NMAKE
REM
-------------------------------------------------------------------------
SET
CC=cl
SET
CFLAGS=-c -DSTRICT -G3 -Ow -W3 -Zp -Tp
SET
CFLAGSMT=-c -DSTRICT -G3 -MT -Ow -W3 -Zp -Tp
SET
LINKER=link
SET
GUIFLAGS=-SUBSYSTEM:windows
SET
DLLFLAGS=-SUBSYSTEM:windows -DLL
SET
GUILIBS=-DEFAULTLIB:user32.lib gdi32.lib winmm.lib comdlg32.lib comctl32.lib
SET
RC=rc
SET RCVARS=-r -DWIN32
(For mor details on using the NMAKE Application refer to "Programming Windows 95 by Charles Petzold, Microsoft Press)
The paths to the various libraries of the Developer Studio are listed in the file vcvars32.bat, which is automaticaaly generated while installing the Visual C++. The contents of the vcvars32.bat on this installation are shown below:
@echo off
rem
rem Root of Visual Developer Studio installed files.
rem
set MSDevDir=C:\Program Files\DevStudio\SharedIDE
rem
rem Root of Visual C++ installed files.
rem
set MSVCDir=C:\Program Files\DevStudio\VC
rem
rem Root of Visual C++ files on cd-rom.
rem Remove "set vcsource=" if you don't want include cdrom in Visual
C++ environment.
rem
set vcsource=F:\DEVSTUDIO
rem
rem VcOsDir is used to help create either a Windows 95 or Windows NT specific
path.
rem
set VcOsDir=WIN95
if "%OS%" == "Windows_NT" set VcOsDir=WINNT
rem
echo Setting environment for using Microsoft Visual C++ tools.
rem
if "%vcsource%" == "" goto main
rem
rem Include cdrom files in environment.
rem
if "%OS%" == "Windows_NT" set PATH=%PATH%;%vcsource%\VC\BIN;%vcsource%\VC\BIN\%VcOsDir%
if "%OS%" == "" set PATH=%PATH%;"%vcsource%\VC\BIN";"%vcsource%\VC\BIN\%VcOsDir%"
set INCLUDE=%INCLUDE%;%vcsource%\VC\INCLUDE;%vcsource%\VC\MFC\INCLUDE;%vcsource%\VC\ATL\INCLUDE
set LIB=%LIB%;%vcsource%\VC\LIB;%vcsource%\VC\MFC\LIB
set vcsource=
:main
if "%OS%" == "Windows_NT" set PATH=%MSDevDir%\BIN;%MSVCDir%\BIN;%MSVCDir%\BIN\%VcOsDir%;%PATH%
if "%OS%" == "" set PATH="%MSDevDir%\BIN;%MSVCDir%\BIN";"%MSVCDir%\BIN\%VcOsDir%";%PATH%
set INCLUDE=%MSVCDir%\INCLUDE;%MSVCDir%\MFC\INCLUDE;%MSVCDir%\ATL\INCLUDE;%INCLUDE%
set LIB=%MSVCDir%\LIB;%MSVCDir%\MFC\LIB;%LIB%
set VcOsDir=
To rebuild the application in the Microsoft's Developer Studio (in Visual C++) make a new project named Evt, and select Evt.MAK for the make file. Copy the source file, the RC file and the make file (and of course the data files) in the Evt directory, and build the application.