Publication Date:
2020-11-23
Description:
Abstract
Seismic data users and people managing a seismic network take a great interest in the
potentiality of the data, with the difference that the former look at stability, the latter at
improvements. In this work, we measure the performances of the Italian Telemetered Seismic
Network in the years 1985-2002 by defining basic significant parameters and studying their
evolution during those years. Then, we deal with the geological methods used to characterise
or to plan seismic station deployments in a few cases. Last, we define the gain of the network
as the percentage of well-located earthquakes with respect to the total recorded earthquakes.
By analysing the distribution of non-located (“missed”) earthquakes, we suggest possible
actions to take in order to increase the gain.
Results show that completeness magnitude is 2.4 in the average over the analysed period,
and it can be as low as 2.2 when we consider non-located earthquakes as well. Parameters
such as the minimum recording distance and the RMS of the location decrease with time,
reflecting improvements in the location quality. Methods for geologic and seismological
characterisation of a possible station site also resulted to be effective. Finally, we represent
the number of missed earthquakes at each station, showing that nine stations control more
than 50% of all missed earthquakes, and suggesting areas in Italy where the network might be
easily improved.
Description:
Published
Description:
open
Keywords:
Seismic Networks;
;
Earthquake location
;
04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
891306 bytes
Format:
application/pdf
