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Exercises

Exercise 2. Editing the catalog.


Catalogs have errors. When finding an error you may wish to introduce some corrections. CompiCat facilitates in correcting earthquake catalog entries, in finding and, if needed, sorting temporal disorder.
1) Run CompiCat: Click Import button in the vertical Tools bar on the left; Open the file ...\ecp\exercises\ex2checkerr.txt.

2) Check in the lower plate on tab Errors and correct corresponding entries in the right upper plate one by one the evident mistakes identified in the catalog by CompiCat. For details of editing catalog entries see Manual page 6 - The catalog editor. Don't forget saving each segment of corrections, the last one, in particular.



Correct records according to the following suggestions::
1: fields: minute
1: 2002 1 1 2 94 17.06 37.216 -3.702 0.7 0 0 1.5 0 0
Change for 1: 2002 1 1 2 44 17.06 37.216 -3.702 0.7 0 0 1.5 0 0

2: fields: month
2: 2002 15 1 3 44 14.5 -33.948 -70.361 113.9 0 0 3.1 0 0
Change for 2: 2002 1 1 3 44 14.5 -33.948 -70.361 113.9 0 0 3.1 0 0

3: fields: hour
3: 2002 1 1 35 23 23.68 44.566 7.192 9 0 0 2.2 0 0
Change for 3: 2002 1 1 5 23 23.68 44.566 7.192 9 0 0 2.2 0 0

4: fields: latitude
4: 2002 1 1 17 30 43.2 94.082 7.938 8.7 0 0 1.9 0 0
Change for 4: 2002 1 1 17 30 43.2 34.082 7.938 8.7 0 0 1.9 0 0

3) After getting from you the corrections of all identified errors CompiCat checks the catalog for disorder in time and, if it finds any, await for your decision either to sort the catalog by time or to correct the entries resulting the identified disorder.




Correct records according to the following suggestions::

1: fields: month
1: 2002 10 1 1 7 1.5 -32.717 -73.013 23.1 0 0 3.5 0 0
Change for 1: 2002 1 1 1 7 1.5 -32.717 -73.013 23.1 0 0 3.5 0 0

2: fields: month
2: 2002 11 2 5 23 1.89 -18.019 -178.564 631.4 5 0 5.3 0 0
Change for 2: 2002 1 2 5 23 1.89 -18.019 -178.564 631.4 5 0 5.3 0 0

4) Use File->Save as orSave as button in the horizontal File bar at the top to save the catalog with corrections in the CompiCat standard format (i.e., csf) as ex2checked in the ...\work directory.


Exercises

Copyright 2008 MITPAN
ECP 1.3.0