Seismology Instruction with the AS 1

     If data has already been collected on this PC but the 

AS 1 instrument is not attached at this time, an error 

message will be displayed after the AmaSeis program 

is launched.  The program will still run and be able to 

scroll back to previously recorded data or open events 

that have been saved to disk. 

AmaSeis File Structure

     AmaSeis stores data in a set of nested folders.  A year's worth of data will take up about 

350 megabytes.  This can be searched for events at any time.  Be aware of the amount of space 

the data will take so that you don't fi ll your disk.  To erase old data, use the Windows Explorer.  

Remember, once it is deleted, you can not recover it.  

     The path to the AmaSeis directory (if you used a standard install) is My Computer > 

System C > AmaSeis.  The AmaSeis directory contains data folders, fi les, and the program.

         AmaSeis creates a series of nested folders 

to store data.  The top level folders are divided by 

years.  In each year folder, there will be 12 month 

folders which contain subfolders for each day.  The 

actual data fi les are saved with the naming 

convention hour.z.  After the data is placed in the 

correct directory structure in the AmaSeis folder 

it should be visible.  From the Helicorder screen 

select Settings > Helicorder and change the Days 

to Retain Records option to something big enough 

to  look back  to the time period in question. 

   AmaSeis references time in Coordinated Universal Time (UTC), 

the international time standard. It is the current term for what was 

commonly referred to as Greenwich Meridian Time (GMT).  Zero 

(0) hours UTC is midnight in Greenwich England, which lies on 

the zero longitudinal meridian. Universal time is based on a 24 

hour clock, therefore, afternoon hours such as 4 pm UTC are 

expressed as 16:00 UTC (sixteen hours, zero minutes). 

Conversions of UTC:

  Mountain Standard (Tucson) + 7 hours  

  Eastern Standard (Washington DC) + 5 hours

CAUTION:  Keep your computer set to local time, AmaSeis 

makes the necessary adjustment based on your time zone setting.

AmaSeis Version 1.0 Level 2005.05.19

4.3