NCSN Data Y2K Compliant
October 21, 1999
The traditional formats used for archiving and distributing the NCSN earthquake catalog, phase, and focal mechanism data at the NCEDC were not Y2K compliant, as they contained only a 2 digit years. On October 21, 1999 the NCEDC started distributing the data in an updated Y2K compliant format. You can find documentation on the new Y2K compliant format on our documentation page.
The CNSS and UCB formats for catalog and phase data have not been changed, as they are Y2K compliant.