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1. 14 Optionally you can chose weather you want to create synthetics picks or not which can later be seen in the Production Screen After done the relocation the new event s location parameters will be updated and you can also review the hypo71 files by clicking the corresponding button see Fig 14 na ny nn E t p ti aL Event Lroperties Figure 14 Event Properties window In this Name 20050213185130078 la window you can manually amend event data enable disable associated picks and most important perform the relocation of the event by using the hypo71 algorithm Origin Date Time 13 02 2005 18 51 16 500 Latitude 46 5535 Longitude 71 8787 Depth 1 38 Status lt NOT_SET gt v Notes lt NOT_SET gt Picks MURT P 18 51 27 524 0 210 1 05 BALM P 18 51 29 810 0 250 1 03Cf IBAN P 18 51 23 017 0 270 1 060 5 LAVA P 18 51 43 323 0 360 0 970 w lt lt gt Number picks for relocation 39 Relocation using hypo71 Use hypo71 input files from this folder Depth stat 2 X Near 0 Depth step 2 X Far 9999 Num steps 10 Relocate Y Generate synthetics View hypo71 files Close 15 3 2 3 Map In this window you can see the distribution of stations depicted by triangles and the event depicted by a star in case this has been located 3 2 4 Contents Here you can manually edit contents such as waveforms data picks events stations and velocity model For example 1f you have previously2. 2006 12 31 2006 12 31 2006 12 31 2006 12 31 2006 12 31 2006 12 31 2006 12 31 2006 12 31 2006 12 31 24 00 00 24 00 00 24 00 00 24 00 00 24 00 00 24 00 00 24 00 00 24 00 00 24 00 00 the number of the field for 2 The second field contains a string naming the data logger type E g REFTEK TAURUS etc 3 Contains gain information Basically thought for personal remaining 4 Format type of data logger E g 16 14 2 32 etc 5 Type of sensor E g TRIL120P GURALP3ESP etc 6 Sensor number HTH 297 8 Station name Corresponds to a string of maximum characters 9 Geographical decimal latitude in degrees positive north 10 Geographical decimal longitude in degrees positive east 11 Height above the sea level positive upwards in metres 12 Start date of registration validity in format yyyy mm dd 13 Start time of registration validity in format hh mm ss 14 End date of registration validity in format yyyy mm dd 15 End time of registration validity in format hh mm ss 16 String containing for example the operator s name or any other useful information SDX does not accept stations with negative height 4 2 Velocity model file The velocity model file is defined by two columns containing and P wave velocity and top of the layer respectively Fig 17 Field 1 contains P wave velocities in km s whilst field 2 contains the depth of the top of each layer in km Fie
3. 99999 433 99999 99999 99999 99999 2004 01 01 00 00 00 000 99999 99999 99999 99999 2006 12 31 00 00 00 000 99999 99999 99999 99999 lt NOT_SET gt lt NOT_SET gt AYSN lt NOT_SET gt lt NOT_SET gt lt NOT_SET gt lt NOT_SET gt lt NOT_SET gt 2013 01 11 18 18 58 976 lt NOT_SET gt lt NOT_SET gt lt NOT_SET gt lt NOT_SET gt lt NOT_SET gt 2013 01 11 18 18 58 976 lt NOT_SET gt STATIONSET end Figure 18 Example of a SDX project file Each section 1s started and ended by a flag of the type NAME In this example most of the sections have no information except SYNTHETICSSET TRACESET and STATIONSET 19 List of Shortcuts Shortcut ESC Reset all scaling in station zoom pane Reset horizontal scale in station zoom pane er NO Left Right Ctrl Left Ctrl Right Shift Left Shift Right Selected pick s polarity set to positive up Selected pick s polarity set to negative down er Backspace Delete Ctrl O Ctrl N Print main window S O Ctrl P Print main window Ctrl S Save project Ctrl Q Quit Ctrl K Toggle picking mode Ctrl E Associate selected picks into event 20 Quick Start Guide for Event Location The following steps are designed to quickly start using SDX in order to process seismic data and perform earthquake locations For a more detailed guide please read the full SDX user manual 1 Before processing any data we must set some basic options Thi
4. imported a Stations data file in the Contents editor you can review this information and amend any necessary data regarding the stations information 3 3 View Menu In the View menu it is possible to access to the different screen modes as well as to configure several display options Overview Screen Production Screen Absolute time Relative time Sort overview gt Alphabetic Y Simplify overview e Epicentral distance Only Zin overview Hypocentral distance Only Zin station zoom Back azimuth Toggle time tips Y Absolute particle scale 1s guide lines 10s guide lines 60s guide lines Toolbars gt Figure 15 View menu options with Sort Overview choices displayed As depicted in Fig 15 in the View menu you can configure the following options 1 switch on off the Overview and Production screens 2 navigate between stations 3 switch on off the display of Absolute or Relative time for the traces 4 sort the stations order alphabetically by epicentral distance by hypocentral distance or by back azimuth 5 switch on off the simplify overview option when it is on a horizontal line denotes the presence of traces in the Overview pane when it is off this pane shows the actual waveforms 6 display only the vertical component in the overview and or the station zoom panes 7 switch on off time tips 8 display absolute particle scale 9 switch on off guide lines in the seismograms every 1 10
5. on the Fonts and Colours tab on File gt Preferences In order to locate an event it is necessary to define the path to the hypo71 executable file in Preferences and to have imported a velocity model and a stations list see Section 3 for format details Once in the Event Properties window and given a list of selected picks in the Picks panel see Fig 14 click on the Relocate button to locate the event The event s information will be automatically updated in the Event Properties window and additional information such as status and notes can also be added manually SECTION 3 SDX Menus 3 1 File Menu The File menu contains the basic commands such as Preferences Import Export Save File etc Following there is a detailed review of the File menu s commands that might need further explanation About SDX Preferences New Ctrl N Open Ctrl O Import gt Export gt ArcLink gt Save Ctrl S Save As Print Ctrl P Quit Ctrl Q Figure 7 List of commands found in the File menu 3 1 1 Preferences The Preferences menu contains all the options available to customize SDX 3 1 1 1 In the General tab it is possible to set the user name agency name and time of automatic backup if desirable Also in the General tab is the field to set the location path for the plugins and the hypo71 executable file In order to locate an event we must specify the location path of the Hypo71 executable file in the General
6. period in the Station pane controls the waveforms shown in the Station Zoon pane If the Station pane is closed then changing the time period in the Overview pane directly controls the amount of the waveforms shown in the Station Zoom pane To select a time period in the Overview or Station panes use the time span box This is a rectangular box with green handles that can be resized to control the relevant time period see Fig 2 Click inside the time span box to make the green handles appear Drag either handle to the left or right to alter the total time spanned If the time span box is selected the mouse pointer can be positioned inside the box and click dragged to move the box Again if the time span box 1s selected small adjustments can be made to its position with the left amp right arrow key and the width of the span can also be adjusted using the keys combinations Shift lt and Shift gt Pressing the Page Up or Page Down keys moves the selected time span box by half its width To alter the span of waveform shown within the Station Zoom pane directly right click the mouse with the pointer inside the Station Zoom pane and drag to create a rectangle When the mouse button is released the length and position of the waveform shown in the pane is defined by the selection rectangle To return to the previous time span press the ESC key The waveform display in the Station Zoom pane can be moved forward or backwa
7. 80 sdx bin SDX Please note this link is not permanent it may change later Although SDX executable file integrates with Qt static libraries some operating system dynamic libraries are requested These dynamic libraries cover X Window libraries dynamic linking libraries real time extensions libraries threads library and c libraries When you run SDX file if the following libraries are required please contact with your system administrator to install The dynamic libraries required by SDX are libXext libX11 libdl librt libpthread libstdc libm libgcc_s libc libxcb libXau and libXdmcp But if you are developer and want to edit SDX source code then you can download Qt development package and SDX source code package The SDX source code can be edited under Qt Software Development Environment But this is out of range of this manual SDX developer manual may be written and cover this content SECTION 2 SDX User Guide 2 1 Initiating SDX Once installed type SDX in a terminal window The Overview Screen of SDX should appear as in Fig 1 If the Overview Screen does not appear it can be activated by toggling on in View gt Overview Screen SDX menus ma mm X SDX lt new gt File Edit View Plugins Help Edit tool bar dh Figure 1 Overview screen also showing the SDX menus Edit tool bar and View tool bar The first line of the Overview Screen contains the main menus of SDX File Edit View Plugins and He
8. SDX Seismic Data eXplorer User s Manual CONTENTS CONTENTS cuina diia 2 INTRODUCTION crin a aaa a aaaea aa Ea aa 3 SECTION 1 INSTALLATION OF SD nnccccccoconiiiira narrar rr rr 3 SECTION 2 SDX USER GUIDE 0 AA 4 0 AAA ES oO A de i esos e cit 4 A2 TAE ES DULY LOO Tt AIR a 5 Zas THE VIEW TOOLBAR a AAN ee 5 2 4 STARTING A NEW PROJECT AND IMPORTING DATA cocinar 6 Le LOADING ASESOR dee cca enmnaan 7 20 SELECTING TIME PERIOD Saa ds 7 2 7 NAVIGATING BERWEEN STATION Sii aa NE 7 2 8 ADDING MODIFYING AND DELETING PICKS ve ccscssccssssscsscscessssessecsecevseseuseuseseesevaeceuseveesevseveeseusevnsevsevesses 8 29S CAGING WHE TRACE DIS PGA ad 9 2 10 ASSOCIATION OF PICKS INTO EVENT Sa AA A iia 9 ZA LOCATING AND REVISINGAN EVEN Dad 9 SECTION SDA MENUS ds 10 SIE MENTA id 10 SLL PETEN o POCO PRO Pern O E RAA A arn E are Rrra eee 10 A 0 GH O01 as irene rer eeer reeerere te rede tmemrereren rerrtrerrree E Mery rar ere etre nr ttre te serene errr 11 SR DO lot 12 E mE ee ee ER PP Pe EY or rE CRP Er OTE PE PPR RE ESE 12 iZ GR Hd MEN Dados 13 A e IA 13 RS NS E EE EIEE EEEE ANAA AAA 14 SA S MOD EAEE O A E O 16 DL EC OTIVOIIUS riina aT a a A a TE 16 3 VEW MEN oa a ements 16 SECTION 4 CONTENTS AND FORMATS OF INPUT AND PROJECT FILES 17 AL STATION STE di decia 17 EZ VELOCITY MODEL PIE aba a nnima 18 AS EXAMPLE OF A PROJECTE ED e ees 18 EIS TOR SHOR UCU ES aa 20 QUICK START GUIDE FOR EVENT LOCATION ssssssssssnunnnennnnnnnnnnnnnnnnnnnnnnnn
9. and or 60 seconds 10 switch on off the display of toolbars 16 TIP After located an event you can sort the stations by for example epicentral distance Therefore you can review your picks from the closest stations stronger signal to the furthest ones weaker signal in a tidy and clear way SECTION 4 Contents and formats of input and project files 4 1 Stations file The format of the stations file follows the standards of the so called experiment file on the GIANT software package Rietbrock and Scherbaum 1998 An example of this file is shown in Fig 16 Fields must be separated by at least one blank space WA HGH 7H HSH HOH 10 11 12 13 144 15 4A89 4482 3434 3014 3433 4905 3527 4A96 4A91 LOVE RICA ARDI ARDI COCH CHAC TRAN MURT GUAD 46 1916 46 1248 46 1621 46 1621 47 3165 47 1174 46 6354 46 4550 46 8629 72 7976 72 5562 72 1862 72 1862 72 5695 72 4858 72 8395 72 6800 72 6925 2004 01 01 2004 01 01 2004 01 01 2004 01 01 2004 01 01 2004 01 01 2004 01 01 2004 01 01 2004 01 01 Figure 16 Example of an station file The first raw indicates description purposes only this raw is omitted in the actual file Following there is a description of each one of the fields 1 The first field corresponds to the unique device number of the instrument data logger 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
10. e data interval around cursor s 1 Origin Method ID hypo71 Origin Earth Model ID local Reset station zoom view when navigating between stations Close 4 Figure 8 Defaults tab in the Preferences menu showing the Phases Filters and other customizable options in SDX 3 1 2 Import The Import command allows to import seismic data stations information and a velocity model into the current SDX project The accepted seismic formats in SDX are miniseed ISF and Liverpool format For example in order to import a folder containing miniseed files for an event click on File gt Import gt Folder of miniseed and then select the desired folder The command Import also allows to import picks files to the data in the formats SDX and MS Picker and to import events in the formats Binder and Phaff Finally it is 11 also possible to import a stations file and a velocity model file by using this command see required formats in the Input Files Format section 3 1 3 Export This command allows to export picks in the current project to a file in the format SDX and Binder Also it is possible to export the current event into a Binder event file 3 1 4 ArcLink ArcLink is a real time data transfer protocol developed by the Helmholtz Centre Potsdam Germany to transfer seed and miniseed data files ArcLink is implemented in SDX and can be accessed by clicking on File gt ArcLink Three options are available Check Inventory Simple Request and Co
11. e see section 3 1 4 for details In order to import a velocity model click on File gt Import gt Velocity model and then browse the velocity model file To import a list of seismic stations go to File gt Import gt Stations and then select the stations file See the files format section for details on the required format for input files At the beginning it 1s also important to set the path to the executable file of hypo71 on the General tab in File gt Preferences gt General as shown in Fig 5 B22 Preferences General Defaults Fonts and Colours Used for newly created items User User Name Agency University of Liverpool Required for plugin operation Installation Folder User Plugin Folder Choose Required for relocation Hypo 1 home Software SDX hypo71pc Choose Y Automatically backup project every 5 mins Close y Figure 5 Preferences General tab highlighting in red the location path of the hypo71 executable file 2 5 Loading a seismogram Currently there are 3 seismogram formats accepted in SDX mini seed Liverpool format and ISF format Seismic records can be loaded in File gt Import and then the correspondent format In the case of mini seed files it is possible to import them as individual files or as a folder containing the files 2 6 Selecting time periods Selecting a time period in the Overview pane controls the amount of the waveforms shown in the Station pane Similarly selecting a time
12. g onset polarity weight phase name are automatically set to be the same as those of the last pick to be edited but can be modified by keyboard shortcuts or the Pick Properties Editor Fig 12 One or more picks can be selected by multi select CTRL left click on multiple objects or by left clicking and dragging the selection rectangle over multiple objects The position of the pick s can be modified by dragging the selected picks in the Station Zoom pane with the left mouse button pressed or by using the left amp right arrow keys As a selected pick moves the label that normally denotes the pick s attribute set changes to display the current time position and amplitude of the waveform at this position To delete one or more picks select the picks and press the Delete key The attributes of a newly added pick or a selected pick can be modified either by using a variety of keyboard shortcuts or the Pick Properties Editor see section 3 2 1 and Fig 12 To display the Pick Properties Editor either double click on a pick with the left mouse button or click on the menu Edit gt Picks Picks are displayed in all three panes New picks can only be added in the Station Zoom pane Pick properties can also be modified in the Overview pane but the position cannot Picks can also be deleted from either of these two panes TIP When selecting picks in the Overview pane it may be necessary to move the time span tool to one side to allo
13. lds must be separated by at least one blank space 007 Figure 17 Example of a velocity model file The first raw indicates the number of the field for description purposes only this raw is omitted in the actual file 4 3 Example of a project file sdx SDX creates a project file every time you save the current working project This file contains among others the path to the velocity model the used stations loaded seismograms travel time picks created events etc A great advantage on the format of the SDX s project files is that they are ASCII files which can be manually amended by using any conventional text editor Fig 18 shows an example of a SDX project file and its basic structure Each section is separated by the flags NAME and NAME where NAME the name of the section e g STATIONSET TRACESET PICKSET EVENTSET etc and the signs and indicating the beginning and end of each section respectively 18 VERSIONSET VERSIONSET INFOSET INFOSET SYNTHETICSSET 1 77 home velmod_aysen 2 2 10 0 9999 SYNTHETICSSET TRACESET home 20050213_ 1851 MS 2005 044 18 50 00 0000 XJ PSAN HHE D mseed MS 2005 044 18 50 00 0000 XJ PSAN HHN D mseed TRACESET PICKSET PICKSET EVENTSET EVENTSET ORIGINSET ORIGINSET STATIONSET station LOVE_20040101_000000_20061231_000000 LOVE 46 1917 99999 99999 99999 99999 72 7976 99999 99999 99999
14. lp The second line contains two tool bars the Edit tool bar and the View tool bar In order to interact with seismograms we must activate the Production Screen This can be done by toggling on in View gt Production Screen The Production Screen contains three panes Fig 2 Overview Station and Station Zoom The three different panes basically offer three zoom levels to the data being the Station Zoom pane the only one where the phase picking can be performed The relative size of each pane can be modified by dragging upwards downwards the horizontal separator between panes Fig 2 For example the Station pane can be closed by dragging the horizontal separator between the Station and Station Zoom panes upwards until it meets the next horizontal separator above The Station pane can be opened again by reversing the same operation 000 X SDX 20050213_1851 File Edit View Plugins Help E FF q py 100 v 100 v 1 102N y Integrate Rotate Demean Abs Amp Mi ES A E AS A B E ea EE T EIT E RU US A A A SS a O E NAAS OE P O F UE A A 13 18 50 50 30 51 00 51 30 52 00 52 30 53 00 53 30 54 00 54 30 55 00 Bl VERD BHE VERD BHN p reen handles VERD B i Overview Pane CHCH H y A Horizontal gt AS A A OS Sen Re en REE Te eI l v o es Me AS CES NT Separator A 13 18 51 53 00 53 30 54 00 LAMO BHN Sa LAMO BHE ANS Station Pane are Horizontal y SA _ Separator North ECE meane
15. mplex Request In Check Inventory you can access to the available data list provided by a given server You need to input the host name e g webdc eu and communication port e g 18001 in order to access to the archive The inventory information includes network code station code description and start and end time for each available station The Simple Request mode is used to import data through ArcLink by using a simple and friendly interface This mode is directed to the user that is not familiarised with the ArcLink protocol Only one station per request can be imported The form is shown in Fig 9 The user must fill the necessary information in order to download the data Dialog seisdata esc liv ac uk 18001 Network Code 3A Station Code L007 Year Month Day Hour Minute Second Start Time 2010 0 lt gt lt gt lt gt lt gt lt gt lt gt lt gt lt gt lt gt lt gt lt gt lt gt End Time 2010 0 Clean Memory OK Cancel Figure 9 ArcLink Simple Request form ArcLink familiarised users are encouraged to import data by using the Complex Request mode In it the user must enter the correspondent request script describing the desired data In this mode more than one station can be downloaded at the same time An example of the Complex Request mode 1s shown in Fig 10 For more information about the ArcLink protocol please visit the website http www seiscomp3 org wik1 doc applicatio
16. new event or may be associated with an existing event Picks already associated with an event can be disassociated The controls for association and disassociation are the and buttons in the Edit tool bar see Fig 3 To associate pick with an event select one or more picks by rubber banding left mouse click and drag to create a rectangular band If the picks are not currently associated with an event the button becomes enabled Press the button to show the Event Editor window and select one of the two buttons to Create new event include selected picks or Associate picks with existing event When the picks are associated they change colour in the window panes to reflect the colour of the event they belong to To disassociate picks from an event rubber band around already associated picks in the Overview pane and click the button 2 11 Locating and revising an event To open the Event Properties window Fig 14 double click on the name of an event in the Event Editor window s list If the colour of the event is changed by clicking the colour button the new colour is propagated to the picks in the panes If one or more picks entries are selected in the Event Editor window and the Remove button clicked these picks are disassociated in the same way as with the button above and these picks colour revert to the unassociated colour The unassociated pick colour can be defined
17. nnnnnnnnnnnnnnnnnnnn nnmnnn 21 BIBLIOGRAPHY siesisweciscucessiudcrasestaetactavedicn ited sveneeuatead aca 22 Introduction SDX Seismic Data eXplorer is a data visualization and analysis tool deigned for the examination of seismic waveforms at the University of Liverpool UK It is a Qt based application conceptually split into two parts A GUI interface for the control and visualisation of the application A processing framework executed by plugins Besides the visualisation and analysis of seismograms manual picking of seismic arrivals can be done and earthquake location 1s performed through the implementation of the hypo71 code Lee and Lahr 1972 A great advantage of SDX is that project files are ASCII based for convenience therefore these files can be manually edited with any text editor such as vi K Write or gedit SECTION 1 Installation of SDX As Qt based application SDX requests several libraries from Qt development package Currently SDX only supports Linux based operating system Two SDX installation methods are provided First we build SDX executable file with Qt static libraries This SDX file can be called directly without Qt installation We build SDX executable file under ubuntu 10 04 32bit operating system but it also works under ubuntu 10 04 64bit and openSuSE 11 3 32 64bit in addition ubuntu 10 04 32bit after our initial testing This SDX executable file can be downloaded from http doree esc liv ac uk 80
18. ns arclink 12 Host Port Script 3 2 Edit Menu Request Waveform seisdata esc liv ac uk 18001 REQUEST WAVEFORM format MSEED 2010 10 10 00 00 00 2010 10 10 00 10 00 3AL007 END Clean Memory oK Cancel Figure 10 ArcLink Complex Request form The Edit menu allows to amend data such as pick properties event information velocity model stations information visualization of the stations map etc Following there is a description of each one of the commands present in the Edit menu 3 2 1 Picks Picks Events Map Contents Plugins Y Add pick mode Ctrl k Z Align picks Associate picks Ctri E Disassociate picks Ctrl Shift E Figure 11 Edit menu commands Here it is possible to amend the selected pick s properties such as phase name polarity weight etc Most of these properties can also be directly set in the Add pick mode see section 2 8 and shortcuts section 13 OOM X Pick Properties 13 02 2005 18 51 29 810 XJ BALM HHZ FilterID 1 8 2 N H Slow lt NOT_SET gt Backazi 0 Onset Impulsive A Phases P v Name P Polarity Up v Weight 0 v Status Final w Notes lt NOT_SET gt 4 Figure 12 Pick properties editor window 3 2 2 Events The Event Editor allows to create delete or amend an event given a selection of travel time picks Here is where the location of the event is performed AAA X Event Editor lt NOT_SET gt 39 real 0
19. ow TIP Do not forget to save a project before starting a new one For convenience use the extension sdx to name the SDX project files TIP Any error message can be read on the terminal window where SDX is running TIP In order to save time before start analysing a dataset which includes several events recorded by the same network create a template of events project file with extension sdx which includes a loaded velocity model and stations files vp vs ratio etc Save this project file as a template e g template sdx and then each time you need to analyse a new event open the template and load the correspondent waveforms Then save the file as a new project re naming it with the name of the event e g event20130124 Be careful of not giving the same name as the template or you will overwrite on it 21 Bibliography Lee W H K and Lhar J C 1972 HYP071 A computer program for determining hypocenter magnitude and first motion pattern of local earthquakes Open File Report U S Geological Survey Rietbrock A and Scherbaum F 1998 The GIANT analysis system graphical interactive aftershock network toolbox Seism Res Lett 69 40 45 22
20. rd in time in small steps by pressing CTRL Right Arrow or CTRL Left Arrow 2 7 Navigating between stations It is only possible to navigate between stations when the Production screen is toggled on in the View menu The green arrowhead icons in the View tool bar Fig 6 can be used to navigate between consecutive stations in the order the are shown in the Overview pane The order of the stations can be changed by using the Sort Overview option in the View menu see below It is also possible to directly access a station by double clicking on a trace belonging to the required station in the Overview pane e g at the position shown by the blue circle in Fig 6 The arrowhead icons can then be used as normal A disabled arrowhead icon indicates that the end or beginning of the station list has been reached OS Q 100 50 none v Ir emm 3 HHZ Figure 6 Green arrowhead icons in View tool bar red circles 2 8 Adding modifying and deleting picks Picks can be added to a project by left clicking on a waveform in the Station Zoom pane when SDX is in the Add pick mode To enter this mode either toggle the Add pick mode control on in the Edit menu switch on the Add pick mode button in the Edit tool bar or use the keyboard shortcut CTRL K To exit the Add pick mode reverse the toggle operation When a new pick has been added to a trace the pick is automatically selected The new pick s attributes e
21. s is done in the menu File gt Preferences In order to locate an event we must specify the location path of the hypo71 executable file in the General tab of the Preferences menu as seen in Fig 5 2 Start a new project Ctrl N and then load the waveforms to be analysed on File gt Import gt Miniseed or any of the other formats available 3 Import the stations data file and velocity model file on File gt Import and then Stations or Velocity model respectively 4 Toggle on the Production Screen on View gt Production Screen and then open the Add pick mode Ctrl K and manually pick phase arrivals by left clicking the seismograms on the Station Zoom pane 5 Once the manual picking is finished open the Event Editor window on Edit gt Events and set the Vp Vs value e g 1 75 6 On the same Event Editor window create a new event by clicking on Create new event Then click on Associate all remaining picks with current event Double click on the event s name to enter the Event Properties window 7 On the Event Properties window set the location options for Depth start Depth step Number of steps Closest station allowed X Near and Farthest station allowed X Far For example use the following numbers respectively 2 2 10 0 9999 After this click on Relocate to get the location of the event by using hypo71 8 If the event was correctly located the event s information should have been updated on the Event Properties wind
22. st 13 18 51 52 00 LAMO BHN e T e 25 8 ao y A ee mre nan te ous Station Zoom Pane gan ar iii ON fae gt 40 0 18 53 46 987 Figure 2 Production screen showing the three different panes and time span box 2 2 The Edit tool bar The Edit tool bar contains 4 buttons as shown in Fig 3 Functions included are switching on off the Add pick mode aligning selected picks and associate disassociate selected picks Align selected picks Add pick j Disassociate mode Al P lt picks Associate picks Figure 3 Buttons in the Edit tool bar 2 3 The View tool bar The View tool bar allows the user to directly access some of the display options offered by SDX These options include Fig 4 navigating between stations scaling the trace display applied filters etc Stations Scaling Integrate View navigation combo boxes signal Demean 4 P 100 v 40 v 1 102N v Integrate Rotate Demean Abs Amp Filters Rotate View absolute combo box signal amplitudes Figure 4 Buttons in the View tool bar 2 4 Starting a new project and importing data Click on File gt New or use the shortcut Ctrl N to open a new project In order to load seismic data to the project import the seismograms by clicking on File gt Import and then Miniseed to import individual miniseed files or Folder of miniseed to import a folder containing the desired miniseed files It is also possible to import data through an ArcLink server pleas
23. synthetic picks Create new event include any selected picks _ Associate all remaining picks with current event Associate selected picks with current event Disassociate selected picks from event s Disassociate all picks from current event Delete event also disassociates event s picks Synthetics Velocity model velmod_aysen VpNs 1 77 Generate Delete P to P Write p to p secs l Close Ms Figure 13 Event Editor window 14 In the Event Editor window Fig 13 it 1s possible to set a Vp Vs ratio as well as the p to p time 9 Here you can create an event and associate disassociate picks to 1t In order to amend and or locate a created event you must double click on the event name highlighted in blue in Fig 13 to open the Event Properties window Fig 14 Once in the Event Properties window you can edit manually event s data such as name status location origin time etc You can also enable disable or even remove individual picks from the list of event s associated picks Provided that you have the hypo71 executable file and you have set its location path in File gt Preferences gt General tab you can relocate your event in the lower part of the Event Properties window In order to do this you must first set the Starting Depth km Depth Step km and Number of Steps for the hypocentral location search and additionally the closest X near and farthest X Far station allowed for the location process Fig
24. tab of the Preferences menu as seen in Fig 5 3 1 1 2 The Defaults tab contains options to edit phases names filters and uncertainties e The Phase Name correspond to the phase arrival name 1 e P wave S wave PK P wave etc e The Filters panel contain all the available frequency filters in the form lef hfc ns zph where Icf is the low cutoff frequency in Hz hef is the high cutoff frequency in Hz ns is the number of sections and zph correspond to Z in case of a 10 zero phase filter or any other character for a non zero phase filter In this pane new filters can be added or deleted by using the buttons and respectively e The Weight Uncertainty panel shows the weights assigned to the phase picking understood as the uncertainty in seconds of the picking Weight are 0 1 2 3 and 4 being 0 the best quality with the lowest uncertainty In this pane the time uncertainty can be changed to the value desired for each weight 3 1 1 3 In the Fonts and Colours tab it is possible to configure the fonts and colour of the phase picks trace etc mm Preferences General Defaults Fonts and Colours Phases Filters Weight Uncertainty P A 1 10 2 N s pP 0 5 15 2 N sP 0 1 2 2 N 0 0 04 PKPadf 0 5 5 2 N PKPbe 1 8 2 N ik ee PKPab 1 5 2 N gt 02 pPKP 2 10 2 N sPKP 20 2 Z 3 0 8 PKiKP 5 15 2 Z pPKiKP 0 5 8 2 N 4 1 5 PcP A 1 15 2 2 A Grp ha v Ga y G w G Minimum gap between trace records ms 10 Particl
25. w access to the pick objects TIP Pick the phase arrivals only in one component per station for example in the vertical component 2 9 Scaling the trace display The waveform display can be scaled independently of the time span box in either the Overview pane or the Station Zoom pane Scaling in the Overview pane is controlled by the two combo boxes in the View toolbar Fig 4 The left combo controls horizontal scale and the right controls vertical scale Either select a pre set percentage scale or type a value into the text input part of the combo box and press Return Scaling in the Station Zoom pane is controlled by shortcut keys see the shortcuts section below The relevant keys are Fl F2 F3 horizontal and F5 F6 F7 vertical and the ESC key which resets all scaling in the Station Zoom pane Scales increase or decrease by a factor of two each time a key is pressed TIP If a pick is selected in the Station Zoom pane then its position is used as the origin for the horizontal scaling 1 e the pick remains stationary and the waveform expands or contracts around it If no pick is selected then the horizontal scaling has its origin in the centre of the Station Zoom pane 2 10 Association of picks into events To create a new event click on Edit gt Events This will open the Event Editor window Fig 13 where then you can click on Create new event Picks selected in the Overview or Station Zoom panes can be used to create a
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