1976 preliminary handbook for U.S.G.S. Central California microearthquake network

Abstract

This Handbook is a preliminary version of the 1976 addition to the Handbook for U.S.G.S. Central California Microearthquake Network, 1969 to 1975 (Houck and others, 1976). This report is similar in form and content to that report, except that tables on active stations, polarity source events, and saved tapes have not been included. It is anticipated that these tables and others will be included in an overall compilation of data on the Central California Microearthquake Network which will be published in late 1977. This report should provide adequate 1976 information for most Handbook users in the interim. The data in this report should be considered preliminary. They have not been proofread and verified to the degree which would be proper for a final report. The tape configuration and station finder data are probably quite reliable, and the film configuration data are probably almost as good. Film polarity data are sparse for some time periods and questionable readings have not yet been rechecked. A major realignment of stations on film was made from 9 - 12 September. Station finder records for this period assume that the station trace position changed at the time of its appearance in the new position. Actually, some stations may have been recorded in two positions or not at all during part of the realignment period. Use station finder records for this period with caution. On 30 January the polarities of ANV, BKO, ELG, LTW, LWR, MIX, PNM and PNP were changed at the Develocorder.