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Seisan = Earthquake Analysis Software SEISAN EARTHQUAKE ANALYSIS SOFTWARE FOR WINDOWS, SOLARIS, LINUX and MACOSX Version 12.0 Lars Ottem¨oller(1) Peter H. Voss(2) Jens Havskov(1) (1) Department of Earth Science (2) Geological Survey of Denmark and Greenland University of Bergen Øster Voldgade 10 Allgaten 41 1350 Copenhagen K 5007 Bergen Denmark Norway http://seisan.info Bergen June 08, 2021 2 Publisher University of Bergen Department of Earth Science Allegatan 41 NO-5007 Bergen NORWAY ISBN 978-82-8088-501-2 (PDF) Cover The photo on the cover show the sensor at the BSD station, in Denmark, spring 2021. Photograph: P. Voss. Citiation If you need to cite this manual : Ottem¨oller,L., Voss, P.H. and Havskov J. (2021). SEISAN Earthquake Analysis Software for Windows, Solaris, Linux and Macosx, Version 12.0. 607 pp. University of Bergen. ISBN 978-82-8088-501-2, URL http://seisan.info. Alternatively use: Havskov et al. [2020] Havskov, J., Voss, P.H. and Ottem¨oller,L. (2020). Seismological Observatory Software: 30 Yr of SEISAN. Seismological Research Letters, 91 (3): 1846-1852. DOI: https://doi.org/10.1785/0220190313 Contact See SEISAN mailing lists on page 6. Alternatively use: Lars Ottem¨[email protected] Peter H. Voss [email protected] Jens Havskov [email protected] Copyright ©2021 Ottem¨oller,Voss and Havskov. Contents 1 Introduction 1 1.1 Changes in the SEISAN version 12.0 (released 2021-06-08) . .2 1.1.1 A new Nordic Format, Nordic2 . .3 1.2 Information about SEISAN online . .5 2 Structure of SEISAN 7 2.1 Directories . .7 2.2 The database . .7 2.2.1 Phase data and hypocenters . .9 2.2.2 Waveform data and formats . 10 2.2.3 Continuous waveform data . 12 2.3 File types used with SEISAN . 16 2.4 Upper and lower case . 17 2.5 Moving data between Sun, Linux, MacOSX and Windows . 17 3 Installation 18 3.1 Linux . 19 3.2 MacOSX . 21 3.3 Cygwin . 22 3.4 Windows . 23 3.5 Python . 24 3.6 Google Earth . 24 3.7 Database directories for your own system, MAKEREA . 24 3.8 Default parameter files for the main programs . 25 3.9 Color settings . 25 3.10 Compiling SEISAN programs . 27 i ii CONTENTS 3.10.1 Linux . 28 3.10.2 MacOSX . 29 3.10.3 Windows . 29 3.11 Program Version . 30 3.12 Setting general SEISAN defaults, SEISAN.DEF ......................... 30 3.13 Format description in parmater files . 40 4 Seisan Explorer User Guide 41 4.1 SE Locator . 57 5 Using SEISAN 66 5.1 Short user guide . 67 5.1.1 Routine processing . 67 5.1.2 Source parameters . 69 5.1.3 Crustal structure and Q . 70 5.1.4 Magnitudes in SEISAN . 70 5.1.5 Catalog and database work . 74 5.1.6 Seismic hazard . 74 5.2 Getting data into the database . 75 5.2.1 System with digital data . 75 5.2.2 Instrument response . 76 5.2.3 System without digital data . 76 5.2.4 Getting data from ISC into SEISAN . 77 5.2.5 Getting data from USGS or EMSC into SEISAN, get web locations . 80 5.2.6 Database security . 85 5.2.7 Data base tools, content and checks . 86 5.2.8 High accuracy in SEISAN . 87 5.3 Interactive work with earthquake locations, EEV command . 88 5.4 How EEV works . 89 5.5 Working with catalogs . 109 5.5.1 Explosions in SEISAN . 109 5.6 Printing . 110 5.7 General Work with SEISAN . 110 5.8 Graphics in SEISAN . 111 5.9 Logging in SEISAN . 111 CONTENTS iii 5.10 Known problems in SEISAN . 112 6 Description of Programs and Commands 114 7 Hypocenter location programs: HYPOCENTER, HYPO71 and HYPOINVERSE 115 7.1 The hypocenter program, HYP . 115 7.1.1 Phases . 115 7.1.2 Azimuth and single station location . 116 7.1.3 Magnitudes . 116 7.1.4 Use of S-P and L-S differences . 121 7.1.5 Global event location . 121 7.1.6 Criteria for a solution and weighting . 122 7.1.7 Eliminating outliers . 123 7.1.8 Determining which travel time software is used . 124 7.1.9 Starting location . 124 7.1.10 Preventing a local minimum . 125 7.1.11 Alternative model . 125 7.1.12 Location by grid search . 126 7.1.13 Using HYP to determine crustal structure . 126 7.1.14 Running HYP . 126 7.1.15 Station and model files . 128 7.1.16 RESET TEST parameters . 131 7.1.17 HYP output . 134 7.1.18 Problems . 136 7.2 The Hypoinverse program, HYPINV . 137 7.3 Plugin for the iLoc location algorithm, ILOC SEISAN (Linux only) . 140 7.4 Plugin for the NonLinLoc location algorithm, NLL SEISAN (Linux only) . 141 8 Trace plotting, phase picking and spectral analysis, MULPLT 142 8.1 MULPLT main functions . 143 8.2 Use of MULPLT from EEV and SE . 145 8.3 Working with many channels in MULPLT . 146 8.4 Continuous plotting of one channel . 148 8.5 Commands in MULPLT, overview . 150 8.6 Registering new events into SEISAN . 161 iv CONTENTS 8.7 Phase picking, amplitude, weight and polarity . 163 8.8 Theoretical arrival times for global and local phases and location . 165 8.9 Instrument correction and magnitudes Ml, mb and Ms . 166 8.10 Determine azimuth of arrival (3 comp or array) and component rotation . 169 8.11 Data manipulation commands . 170 8.12 Spectral analysis, s(Spec) . 175 8.13 Spectrogram . ..
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