Currently, the UNRSL Digital Stations Network is being upgraded. During this upgrade, the Digital Network will be off line. Updates of the UNRSL Record of the Day page have not occurred as a direct consequence.

An alternative network will temporarily be used. The first 21 stations of the Southern Great Basin Digital Seismic Network (SGBDSN) will help in the updating of local, regional and world-wide earthquakes.

Several items of the seismograms are different. Looking at figure 1;

Fig. 1


The top line, indicates the station number ( 0700 ) and vertical component ( 4 ). Below are two tables, table 1 indicates component direction and table 2 lists the station number and corresponding station name;


Table 1
Number Component
4
vertical
5
north - south
6
east - west

Table 2
Station Number Corresponding Station Name
698
FRG
699
FMW
700
STO
701
SYM
702
SCF
703
NCF
704
CAF
705
LSC
706
CRF
707
TAR
709
STC
710
PUV
711
TPW
712
DOM
713
BTW
714
TWP
715
WLD
755
RED
756
SPC
757
YCW
758
RPY
759
TIM




These stations are not broadband seismograms. They are S13 or CMG4 Sensors which have a bandwidth from 0.1 to 50 Hz.

Past earthquakes and current earthquakes have been saved and will soon be place on the Record of the Day page and the Previous Records of the Day page. Learning the alternative system will take time and delays are very likely. If you have complaints about the delays, or other questions, please contact Russell Brigham (russell@seismo.unr.edu).

When the Digital Network becomes available again, the new system will make it easier to place seismograms on the internet and include several new digital stations in Nevada and Eastern California. It will also fix the slight errors which have plagued our SAC files.