( Selection of stations
and recognition of possible overlap of waves
generated by different earthquakes.
Very often the stations are clustering with
respect to their azimuthfrom the epicenter. For surface wave analysis it
makes sens to use only one representativestation from each cluster. Each
cluster is defined by a given maximum difference between two station azimuths
The program FmtVes
allows you to image
the stations andorganise them into clusters and select a representative station
of each cluster. If the waveforms recorded on the representative station
are not satisfactory (during FTAN analysis) FmtVes
allows you in a
friendly-user way to adopt another station as representative of your
Before analyzing a record from an earthquake, it
might be useful tofind out whether waves from other events can appear on
the record. The program FmtVes
processes a catalog of earthquakes,
i.e. the main event and other earthquakes that might appear on one recordwith
the main event, and a list of stations to be considered. For each pair earthquake-stationthe
program determines the velocity which is required to reach the station at
the time when thesignal, propagating from the main event with a given velocity,
di / ( ( t0 + d0 / x) - ti )
x - velocity
y - expected velocity
di - distance from station to i-th
d0 - distance from station to Main event.
ti - date-time of i-th event.
t0 - date-time of Main event.
This program runs under Fmt environments and is an interactive windows application.