Data Collections

The bulk of the data at the NCEDC consists of waveform and GPS data from northern California. Figure 11.1 shows the relative proportion of each data set at the NCEDC. The total size of the datasets archived at the NCEDC is shown in Table 11.1. Figure 11.2 shows the geographic distribution of data archived by the NCEDC.

Figure 11.1: Chart showing the relative proportion of each data set at the NCEDC.
\epsfig{file=ncedc_chart_type.eps, width=14cm}\end{center}\end{figure*}

Table 11.1: Volume of Data Archived at the NCEDC by network
Data Type GBytes
BDSN/NHFN/MPBO (broadband, electric and magnetic field, strain) waveforms 2,218
NCSN seismograms 1,196
Parkfield HRSN seismograms 1,057
BARD GPS (RINEX and raw data) 740
UNR Nevada seismograms 160
SCSN seismograms 116
Calpine/Unocal Geysers region seismograms 38
EarthScope SAFOD seismograms 372
EarthScope USArray seismograms 19
EarthScope PBO strain waveforms 1
USGS Low frequency geophysical waveforms 1
Misc data 22
Total size of archived data 5,939

Figure 11.2: Map showing the location of stations whose data are archived at the NCEDC. Circles are seismic sites; squares are GPS sites; and diamonds are the locations of USGS Low-frequency experiments.
\epsfig{file=ncedc_all.eps, width=15cm}\end{center}\end{figure*}


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