Declustered version of the catalog by Hauksson, Yang, and Shearer (2012)
during 1981-2018 with magnitudes equal to or above 2.0
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The original catalog is available at:
http://service.scedc.caltech.edu/ftp/catalogs/hauksson/Socal_DD/hs_1981_all_comb_K4_A.cat_so_SCSN_v01

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NOTE:
If you use this catalog, please reference:  

[1. catalog reference] Hauksson, E. and W. Yang, and P.M. Shearer, "Waveform Relocated Earthquake Catalog for Southern California (1981 to 2011)"; Bull. Seismol. Soc. Am., Vol. 102, No. 5, pp.2239-2244, October 2012, doi:10.1785/0120120010

[2. declustering reference] Zaliapin, I., and Y. Ben-Zion, "Earthquake declustering using the nearest-neighbor approach in space-time-magnitude domain", J. Geophys. Res., 2019

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FILE FORMAT

Each earthquake is described by a separate 107 character line with the following format:

       1-6 = event index
      8-11 = year
     13-14 = month
     16-17 = day
     19-20 = hour
     22-23 = minute
     25-30 = second

     32-40 = SCSN cuspid (up to 9 digits)

     43-50 = latitude
     52-61 = longitude
     63-69 = depth (km)
     71-75 = SCSN calculated preferred magnitude

     78-85 = logarithmic normalized proximity, log10(alpha_i)

        88 = background (largest event) index (1 for the largest event in the cluster, 0 otherwise)
        91 = background (first event) index (1 for the first event in the cluster, 0 otherwise)
         
     94-99 = index of the parent (nearest neighbor)
   102-107 = index of the the largest event in the cluster


EXAMPLE:

5 1981  1  2  2 45  51.390   3301591  37.45050 -118.76667   1.550  2.08   0.36705  0  1       4      37

where
	 5 = event index
      1981 = year
         1 = month
         2 = day
         2 = hour
        45 = minute
    51.390 = second

   3301591 = SCSN cuspid

  37.45050 = latitude
-118.76667 = longitude
     1.550 = depth (km)
      2.08 = SCSN calculated preferred magnitude

   0.36705 = logarithmic normalized proximity, log10(alpha_i)

         0 = background (largest event) index (1 for the largest event in the cluster, 0 otherwise)
         1 = background (first event) index (1 for the first event in the cluster, 0 otherwise)
         
         4 = index of the parent (nearest neighbor)
        37 = index of the the largest event in the cluster
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