CSEP 2 CATALOG FORMAT

Catalog Format

Catalog properties:

1. User friendly (easy for non-developers to work with)
2. Self-consistent and Independent
3. Extensible
4. Easy represented in other formats

Considerations:

1. File format
2. Catalogs per File
3. Contents of File

Summary

The catalog will initially be defined as an ASCII .csv format where each row corresponds to a single event. This file will have the following headers:

longitude, latitude, M, epoch_time (time in millisecond since Unix epoch in GMT), depth, +x-offset, +y-offset, catalog_id, event_id

longitude: longitude in decimal degrees [-180,180]
latitude: latitude in decimal degrees [-90,90]
M: magnitude arbitrary units
epoch_time: time since unix epoch [-inf, inf]
depth: hypocenter depth in (km) [0, inf]
+x-offset: east-west offset from lon/lat in (m) [-inf, inf]
+y-offset: north-south offset from lon/lat in (m) [inf,inf]
catalog_id: indicates type of catalog

• observed: -1
• simulated: [0,n_cat-1]

event_id: used to indentify events beyond the basic properties

• comcat: eg., 'ci0000000'
• ucerf3: eg., fault-system solution of supraseismogenic

Example Catalog

lon,lat,M,epoch_time,depth,+x-offset,+y-offset,catalog_id,event_id -117.43017,35.616665,4.73,1562383355630,9.35,0.0,0.0,-1,ci37219500
-117.7365,35.891,4.64,1562383368300,9.1,0.0,0.0,-1,ci37219156
-117.617836,35.803165,4.84,1562383430720,11.44,0.0,0.0,-1,ci37219164
-117.67083,35.86067,4.61,1562383527970,10.32,0.0,0.0,-1,ci37219172
-117.72583,35.913834,4.5,1562383627010,8.0,0.0,0.0,-1,ci37219180
-117.431335,35.530334,4.57,1562383631370,3.83,0.0,0.0,-1,ci37219564
-117.7115,35.902832,4.51,1562383772080,3.18,0.0,0.0,-1,ci38457583
-117.35817,35.556667,4.49,1562383825050,8.71,0.0,0.0,-1,ci38457591
-117.73033,35.890335,4.17,1562383966660,6.15,0.0,0.0,-1,ci38457599
-117.505165,35.714832,4.13,1562383989850,1.74,0.0,0.0,-1,ci37219692
-117.466835,35.65217,4.09,1562384105420,1.97,0.0,0.0,-1,ci38457607
-117.73383,35.902832,4.35,1562384176460,7.27,0.0,0.0,-1,ci38457615
-117.722,35.892334,3.98,1562384498650,7.87,0.0,0.0,-1,ci38457639
-117.693,35.9045,3.96,1562384657670,6.44,0.0,0.0,-1,ci37219924
-117.47034,35.6805,4.26,1562384786870,6.85,0.0,0.0,-1,ci38457679
-117.7495,35.901165,5.5,1562384873420,5.04,0.0,0.0,-1,ci38457687
-117.69,35.9025,3.98,1562384904660,0.5,0.0,0.0,-1,ci37220300
-117.700165,35.9035,4.97,1562385059710,8.26,0.0,0.0,-1,ci38457703
-117.6875,35.9055,4.06,1562385320020,8.43,0.0,0.0,-1,ci38457735
-117.66133,35.869,4.31,1562385470900,7.21,0.0,0.0,-1,ci37421229
-117.70883,35.917,3.9,1562385949900,2.34,0.0,0.0,-1,ci37221188
-117.37383,35.578,3.79,1562385974580,5.91,0.0,0.0,-1,ci38457887
-117.52167,35.55517,4.68,1562386024570,5.64,0.0,0.0,-1,ci38457775
-117.58083,35.777668,3.85,1562386249040,10.41,0.0,0.0,-1,ci37221580
-117.69067,35.902332,3.83,1562386262210,7.27,0.0,0.0,-1,ci37221588
-117.72283,35.887333,3.87,1562386338850,9.17,0.0,0.0,-1,ci37221620
-117.6145,35.584667,4.8,1562386387080,9.73,0.0,0.0,-1,ci38457815
-117.402664,35.604168,3.84,1562386460800,6.72,0.0,0.0,-1,ci37221644
-117.49067,35.6795,3.74,1562386471370,0.91,0.0,0.0,-1,ci37221708
-117.68483,35.910168,5.44,1562386735790,7.41,0.0,0.0,-1,ci38457847
-117.6175,35.785,4.49,1562386755470,10.6,0.0,0.0,-1,ci37221932
-117.717,35.885,3.83,1562386794940,4.9,0.0,0.0,-1,ci38457855