SEISANEarthquake Analysis Software

Lars Ottemöller and Jens Havskov (University of Bergen)

Peter Voss (GEUS)

Background

• Development started in the late 80s• Large number of software contributors• Steady improvements, now Version

9.1• Basics unchanged• Supported operating systems: Solaris,

Windows, Linux and MacOS

Who uses SEISAN

• Geographically widely used(Norway, UK, France, Spain, ..., India, Iran, Philippines, ..., Central and South America, South and East Africa, ...)

• 15% of data sent to ISC in SEISAN format

• National and regional seismic networks• Volcano observatories• Researchers

What can you do with SEISAN

• Import/Export data• Store data (waveform and parametric)• Observatory routine:

– Analyse earthquake data (signal processing, phase identification, ...)

– Compute earthquake parameters (location, magnitude, ...)

– Fault plane solution– Seismicity maps– Produce bulletin and catalogue search

• Research platform, several additional data processing tools

Philosophy• Open source• Open system• Non-commercial• Multi-platform • Integrate essential tools and data

storage into one package• Provide documentation• Provide support• Provide training

SEISAN Help

• Manual (PDF and HTML)• Training document• Seisan Webpage

http://www.uib.no/rg/geodyn/artikler/2010/02/software

• Mailing list: seisan@geo.uib.no

• Authors: jens.havskov@geo.uib.nolars.ottemoller@geo.uib.nopv@geus.dk

Other software

• SAC(http://www.iris.edu/manuals/sac/index.htm)

• Geotool (CTBTO)• Seismic Handler

(http://www.szgrf.bgr.de/sh-doc/index.html)• Giant/Pitsa

(http://www.geo.uni-potsdam.de/forschung/software/giant.html)

• …• Link on Orefus and IRIS

Data Types

•Waveform data•Calibration data•Parametric data

Waveform data

• Created by digitising analogue output from seismometer and time stamping

• Consists of amplitude and time• Translates into ground motion using

instrument response information• Written out by data acquisition

system• Waveform formats understood

directly by SEISAN: SEISAN, SEED, miniSEED, SAC, GSE

Waveform data files

• Single or multiple channels• Data identifier: Station code, Channel

code, Network code, Location code• Timing information• Data values

• Used for: Recording, analysis, archival, data exchange, …

Waveform data into SEISAN

• Conversion of data created by data logger

• Conversion of data provided by another agency (IRIS, ORFEUS, ...)

• Data written out by near real-time processing system (Earthworm, Seislog, SeisComP, ...)

• Automated data collection: SEISNET

Waveform ConversionExamples

• Rdseed: SEED -> miniSEEDSEED -> SAC…

• Wavetool: (mini)SEED <-> SEISAN

SAC <-> SEISANGSE <-> SEISAN

• …

Parametric data

• Derived from waveform data• Observations:

– Arrival times and residuals– Amplitudes– Polarities

• Computed:– Hypocenter location– Magnitudes– Fault plane solution

SEISAN Directory StructureC:\seismo SEISAN-TOP

REA

BERTEST

20062005

01 02 03 ...

WAV

BER

2005

01 02 03 ...

CAL DAT INF WOR

Resp

onse

File

s

Para

mete

r Fi

les

Docu

men

tati

on

Work

space

Waveform filesParametric files

Main SEISAN programs

• EEV: Database tool• MULPLT: Seismogram analysis• HYPOCENTER: Location of local,

regional and teleseismic earthquakes• EPIMAP: Seismicity maps• FOCMEC: Fault plane solution• SELECT: Extract parametric data

EEV

Main SEISAN programs

• EEV: Database tool• MULPLT: Seismogram analysis• HYPOCENTER: Location of local,

regional and teleseismic earthquakes

• EPIMAP: Seismicity maps• FOCMEC: Fault plane solution• SELECT: Extract parametric data

MULPLT

MULPLT

MULPLT

Main SEISAN programs

• EEV: Database tool• MULPLT: Seismogram analysis• HYPOCENTER: Location of local,

regional and teleseismic earthquakes

• EPIMAP: Seismicity maps• FOCMEC: Fault plane solution• SELECT: Extract parametric data

HYPOCENTER MAGNITUDES

All main magnitude scales can be used:

- Local magnitude Ml

- Coda magnitude Mc

- Body wave magnitide mb, mB

- Surface wave magnitude Ms, MS

- Moment magnitude Mw

HYPOCENTER

Main SEISAN programs

• EEV: Database tool• MULPLT: Seismogram analysis• HYPOCENTER: Location of local,

regional and teleseismic earthquakes

• EPIMAP: Seismicity maps• FOCMEC: Fault plane solution• SELECT: Extract parametric data

EPIMAP

Main SEISAN programs

• EEV: Database tool• MULPLT: Seismogram analysis• HYPOCENTER: Location of local,

regional and teleseismic earthquakes

• EPIMAP: Seismicity maps• FOCMEC: Fault plane solution• SELECT: Extract parametric data

FOCMEC

Main SEISAN programs

• EEV: Database tool• MULPLT: Seismogram analysis• HYPOCENTER: Location of local,

regional and teleseismic earthquakes

• EPIMAP: Seismicity maps• FOCMEC: Fault plane solution• SELECT: Extract parametric data

SELECT

Format ExamplesGSE Waveform

DATA_TYPE WAVEFORM GSE2.0WID2 2007/06/04 17:34:54.000 ESK HHZ INT 40000 100.000000

0.10E+01 1.000 -1.0 0.0STA2 55.31650 -3.20517 0.261 0.000DAT2 -986 -988 -990 -987 -992 -984 -982 -992 -984 ...

Format ExamplesGSE Calibration

DATA_TYPE RESPONSE GSE2.0CAL2 ESK HHZ CMG-3 0.13E+00 1. 100.00000 2005/06/01 16:00PAZ2 1 V 1.12701317E+03 5 3 Laplace transform -0.148031845+00 0.148031845+00 -0.148031845+00 -0.148031845+00 -0.11309730E+04 0.00000000E+00 -0.10053090E+04 0.00000000E+00 -0.50265500E+03 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.00000000E+00 0.00000000E+00DIG2 2 6.29326620E+05 100.00000 Reftek

Format ExamplesGSE Phases

EVENT 00000001 Date Time Latitude Longitude Depth Ndef Nsta Gap Mag1 N Mag2 N Mag3 N Author ID rms OT_Error Smajor Sminor Az Err mdist Mdist Err Err Err Quality 2007/04/28 07:18:11.3 51.0730 1.1670 0.0 156 124 65 ML 4.3 41 00000001 0.70 +- 2.32 0.0 0.0 0 +- 5.6 0.04 11.85 +-0.2 m i se Sta Dist EvAz Phase Date Time TRes Azim AzRes Slow SRes Def SNR Amp Per Mag1 Mag2 Arr IDTFO1 9.18 338.0 m P 2007/04/28 07:18:12.6 0.1 T 9.2 00000001TFO1 9.18 338.0 m S 2007/04/28 07:18:13.8 0.3 T 9.2 00000002MENF 9.18 129.0 m P 2007/04/28 07:18:27.2 0.2 T 3.8 00000003MENF 9.18 129.0 m S 2007/04/28 07:18:38.7 0.3 T 3.8 00000004APA 9.18 9.0 mc P 2007/04/28 07:18:34.2 -0.2 T 3.5 00000005SKP 9.18 298.0 m P 2007/04/28 07:18:37.2 0.3 T 3.5 00000006

Format ExamplesSEISAN Waveform

21107 155 6 4 17 29 59.000 1202.000 CWF HH Z 0.99 1201.01 CWF HH N 0.99 1201.01 CWF HH E 0.99 1201.01 EDI HH Z 0.99 1201.01 EDI HH N 0.99 1201.01 EDI HH E 0.99 1201.01 GAL1HH Z 0.99 1201.01 GAL1HH N 0.99 1201.01 GAL1HH E 0.99 1201.01 HPK HH Z 0.99 1201.01 HPK HH N 0.99 1201.01 HPK HH E 0.99 1201.01 KPL HH Z 0.99 1201.01 KPL HH N 0.99 1201.01 KPL HH E 0.99 1201.01 LRW HH Z 0.99 1201.01 LRW HH N 0.99 1201.01 LRW HH E 0.99 1201.01 PGB1HH Z 0.99 1201.01 PGB1HH N 0.00 1202.00 PGB1HH E 0.00 1202.00 CWF HH Z107 155 6 4 17 29 59.990 100.00 120102 4 … -4231 -4220 -4223 -4227 -4229 -4218 -4206 -4200 -4198 -4201 -4202 -4217 -4202 -4205 -4217 -4208 -4221 -4223 -4216 -4233 -4236 -4231 -4239 -4238 -4230 -4216 -4231 -4235 -4217 -4207 -4198 -4195 -4200 -4192 -4183 -4178 -4178 -4183 -4172 -4178 -4179 -4185 -4195 -4198 -4197 -4186 -4196 -4192 -4196

Format ExamplesSEISAN Calibration

ESK S Z 97 044 2 13 17 30 0.000 55.3167 -3.2050 263 Mk3;500V/m/s;fmA/M(5)40dB;Flt.002&40Hz@-1&6p;VME A/D2048c/V RMY 13/02/97 1.000 0.700 499.251 40.0002048.000.459E+09 0.002 -1.000 40.000 6.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000.100 .200 .300 .400 .500 .600 .700 .800 .900 1.00 .140E-02.112E-01.377E-01.888E-01.171 .286 .435 .609 .801 1.00 -1.701 -1.864 -2.026 -2.192 -2.366 -2.545 -2.727 -2.905 -3.077 3.0471.10 1.20 1.60 2.00 2.40 3.00 4.00 5.00 6.00 8.00 1.20 1.39 2.10 2.73 3.32 4.18 5.60 7.00 8.40 11.2 2.902 2.771 2.380 2.129 1.954 1.765 1.542 1.371 1.226 0.97010.0 12.0 14.0 17.0 20.0 23.0 26.0 30.0 40.0 50.0 14.0 16.8 19.6 23.8 28.0 32.2 36.3 41.4 39.6 17.8 0.738 0.516 0.297 -0.028 -0.358 -0.697 -1.052 -1.565 -3.107 1.917

2007 8 1 0413 43.84L 56.463 -6.531 12.2 BGS 8 0.4 1.4LBGS 1 GAP=270 1.08 6.3 29.0 12.4 0.1431E+03 -0.1777E+03 -0.1814E+02E XNEAR 150.0 XFAR 250.0 SDEP 10.0 3 2007-08-01-0414-21S.MOQ___014 6 2007-08-01-0412-50S.KYL___011 6 ACTION:REE 07-08-02 11:53 OP:gdf STATUS: ID:20070801041441 I STAT SP IPHASW D HRMM SECON CODA AMPLIT PERI AZIMU VELO SNR AR TRES W DIS CAZ7 KAR1 SZ EP 413 54.93 95 -0.0910 66.6 40 KPL HN ES 414 14.81 67 -0.0710 111 28 KPL HN AML 414 15.16 13.6 0.19 111 28 KPL HE AML 414 15.63 19.1 0.18 111 28 KAC SZ EP 414 5.68 67 0.1310 138 32 EAB SZ EP 414 5.55 67 -0.2410 139 102 PGB1 HE ES 414 24.01 67 0.3710 147 119 PGB1 HE AML 414 25.71 3.3 0.24 147 119 PGB1 HN AML 414 26.70 3.8 0.30 147 119 ELO SZ EP 414 9.49 54 -1.03 8 174 89 EDI HE ES 414 38.60 54 -0.43 3 216 105 EBH SZ EP 414 12.70 54 0.39 6 188 96 KPL HZ EP 414 2.16 67 0.4010 111 28

Format ExamplesSEISAN Phases

SEISAN introductory training course

• Demonstration• Installation• Seisan basics• Phase picking• Earthquake location• Magnitudes• Fault plane solution• Earthquake spectra• Participant’s data

Earthworm and SEISAN

• Earthworm is a modular automated processing system

• Functionality:– real-time data import/export– archive data– signal processing: decimate, filter, ...– helicorder and spectrogram plots– detect seismic events– locate and determine magnitude

• Data output can be in SEISAN format

Earthworm

WAVE-RING

PICK-RING

HYPO-RING

DataImport

Picker

WaveServer

DataAcquisition

AssociationVerification Location

Data Archival

EventTrigger

Waveform and parametricdetection files

SEISAN format

DataProcessing

SharedMemory