Titles: MSEI - Microseismic Events =================================== Contact: J. Roberts SNO Revision History:- ================ 3.02 J. Roberts First version: preliminary plan. Titles Files ------------ ??? Verification ------------ Description ----------- Bank Number: 1 The Microseismic banks consist of individual events detected by the SNO geophones, and software written by the Engineering Seismology Group (www.esg.ca). The microseismic events are written to a titles file generally within five seconds of detection, and are also packaged and dispatched to any interested process (snostream). The titles files are finalized and shipped to surf.sno.laurentian.ca every morning within five minutes after midnight. Data Words ---------- Fixed length Database Header. See titles_dbhdr.html Data types: B(bit), I, F, D(double), H(hollerith 4 char) Word Type Mnemonic Description KMSEI_ 1 I NEVENTS Total number of events in the titles file 2 I NWORDS Number of words in each event 3..10 I Header. Currently unused (all words zero) 11 I TABLE Start of data. Event n (zero based) can be found at KMSEI_TABLE + n*KMSEI_NWORDS Following the header (starting with word KMSEI_TABLE) are the day's events, according to the words at KMSEI_NEVENTS and KMSEI_NWORDS. Word Type Description 1 I Date of event, in the form YYYYMMDD 2 I Time of event, in the form HHMMSScc 3..10 F Time difference of each channel's first waveform, relative to the time of the first channel's waveform. A zero in any of these words except word 4 means that channel was the first to detect a waveform. Time differences are in milliseconds. Word 4 is connected to a non-functional channel. 11..18 F Maximum amplitude of each channel's waveform, in volts. A rough estimate of an event's loudness can be arrived at by averaging these words. Ignore word 12 as it is connected to a non-functional channel.