LCSN WebSeis

Click the Data Setting button
to set time window for detailed look at the seismogram data. Once, you have selected time window, then the data are plotted as PostScript format. You can download this PostScript file or digital data itself in AH format. Download menu is at the bottom of the PostScript plot page. Soon, we will provide you with several alternative data format to save and download.

Click the Filter Setting button
to set your filter parameters to see seismic signals in various frequency bands. For example,
to see local and regional seismic waves; set High-Pass Frequency: 0.6 to 0.8 Hz and Low-Pass Frequency: 5 to 15 Hz;
to see P waves from the long distance earthquake (teleseismic signals), set High-Pass Frequency: 0.6 to 0.8 Hz and Low-Pass Frequency: 3 to 5 Hz;
if you want to see very long period surface waves, set High-Pass Frequency: 0.01 to 0.05 Hz and Low-Pass Frequency: 0.2 to 0.1 Hz
this will give you clear display on 20 to 30 second period Love- and Rayleigh- waves from large earthquakes at long distance from the stations.

Click the Plot Setting button
to set your plotting options.

Click the Event Info button
to get related event information from various earthquake catalogs and to examine arrival times of seismic phases on your WebSeismogram.

Click the Short Help button
to view the help page of "WebSeis".

Click the Clean Up button
to delete the temporary files generated in your session.

Click the Daily Display button
to return to the daily 24 hour display page.

May 10, 2000
Won-Young Kim