The Seisan Earthquake Analysis Software

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Presentation transcript:

The Seisan Earthquake Analysis Software Lars Ottemöller1), Peter Voss2) and Jens Havskov1) University of Bergen GEUS

Outline Overview and background Local earthquake data processing Catalogue work with SeisanExplorer Processing of an earthquake using global data Concluding remarks

What is Seisan? Seisan is an interactive and efficient software package for processing of earthquake data at seismic observatories

What can you do with SEISAN (basic) 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

What can you do with SEISAN (more advanced) Prepare data for travel time inversion (velest, simulps) Compute relative times using cross-correlation for hypoDD input Detection of events in continuous data Moment tensor inversion using Dreger code Compute noise and make PDF plots Crustal Q inversion Magnitude scale inversion ...

Background Development started in the late 80s Large number of software contributors Steady improvements, now Version 10.2 Basics unchanged Supported operating systems: Windows, Linux, MacOS and Solaris

Philosophy Open source Open system Non-commercial Multi-platform Integrate essential tools and data storage into one package Documentation Support Training

Seisan users Geographically widely used >25% of data sent to ISC in SEISAN format National and regional seismic networks Volcano observatories Individual researchers

Formats Import through conversion of many waveform and parametrics formats Waveform data: Seisan, miniseed, SEED, GSE, SAC Parametric data: Seisan Calibration data: Seisan, GSE, SAC, RESP

Directory structure C:\seismo SEISAN-TOP REA WAV CAL DAT INF WOR TEST BER BER Workspace Response Files Documentation Parameter Files 2005 2006 2005 01 02 03 ... 01 02 03 ... Parametric files Waveform files

Training and support Fairly regular courses and workshops by University of Bergen and others Software manual Training document Tutorial Mailing list

Why people may like it Works even on small Linux and Windows systems Efficent processing Open source Free Flexible with formats Support and manual

NMSOP IS11.7: Analysis of a local earthquake in Norway Date: 14 Mar 2012 Origin time: 19:22:27.9 (UTC) Latitude: 59.526°N Longitude: 5.615°E Depth: 13.9 km ML: 3.4

Demonstration

Wadati diagram Travel time plot

Seisan Explorer Demonstration

NMSOP IS11.7: Analysis of an intermediate earthquake in Colombia with teleseismic data Date: 09/02/2013 Origin time: 14:16:06.3 (UTC) Latitude: 1.14°N Longitude: 77.36°W Depth: 129 km Mw: 7.0

Demonstration

# 1 9 Feb 2013 14:17 8 D ? l date hrmn sec lat long depth no m rms damp erln erlt erdp 13 2 9 1416 6.75 110.98N 77 22.6W 132.4 19 3 0.64 0.000 15.6 12.3 48.7 stn dist azm ain w phas calcphs hrmn tsec t-obs t-cal res wt di LCO 3417 168.5 39.7 0 P P 1422 9.6 362.83 362.82 0.01 1.00*17 RCBR 4675 100.0 36.2 0 P P 1423 45.0 458.23 458.28 -0.05 1.00*11 PFO 5430 315.6 33.7 0 P P 1424 39.4 512.70 511.80 0.90 0.97*21 EFI 6139 165.5 31.5 0 P P 1425 25.1 558.33 558.79 -0.47 0.99* 9 CMLA 6665 46.1 29.8 0 P P 1425 59.0 592.23 591.93 0.30 1.00* 6 MACI 7120 59.1 28.4 0 P P 1426 27.2 620.43 619.48 0.95 0.97* 5 PAB 8482 49.6 24.3 0 P P 1427 40.6 693.81 694.00 -0.20 1.00* 3 KDAK 9032 328.4 22.6 0 P P 1428 6.6 719.81 720.90 -1.09 0.96* 5 BFO 9603 41.8 20.8 0 P P 1428 32.9 746.20 747.04 -0.84 0.98* 2 KBS 9876 11.1 19.9 0 P P 1428 45.8 759.07 758.66 0.41 0.99* 1 KEV 10448 19.8 19.4 0 P P 1429 8.0 781.28 782.45 -1.18 0.96* 1 BILL 10966 340.1 18.8 0 P Pdif 1429 29.2 802.41 803.17 -0.76 0.98* 2 KURK 13847 18.3 8.0 0 P PKPdf 1434 49.31122.541123.03 -0.49 0.99* 2 NWAO 16204 202.0 7.0 0 P PKPdf 1435 28.61161.821161.84 -0.02 1.00* 4 ENH 16480 348.7 6.8 0 P PKPdf 1435 33.21166.431165.98 0.45 0.99* 2 KMI 17127 359.8 5.9 0 P PKPdf 1435 42.81176.031175.09 0.94 0.97* 2 PALK 17430 68.7 5.4 0 P PKPdf 1435 45.81179.101178.53 0.57 0.99* 3 CHTO 17789 10.1 4.8 0 P PKPdf 1435 49.51182.781182.46 0.32 1.00* 2 KAPI 18088 257.1 4.2 0 P PKPdf 1435 52.21185.461185.29 0.16 1.00* 3 2013 2 9 1416 6.8 D 1.183 -77.377132.4 TES 19 0.6

Concluding remarks Seisan has been a stable processing platform for more than two decades used globally New developments for better GUI are on the way (e.g., SeisanExplorer) User support, documentation and courses have helped to make Seisan successful Efficiency in data processing and combining essential tools into package are the strength of Seisan

Questions?