Publication Date:
2017-04-04
Description:
The necessity of a dense network in Northern Italy started from the lack of
available data after the occurrence of the 24th November 2004, Ml 5.2, Salò earthquake.
Since 2006, many efforts have been made by the INGV (Italian National Institute for
Geophysic and Vulcanology), Department of Milano-Pavia (hereinafter INGV MI-PV), to
improve the strong-motion monitoring of the Northern Italy regions. This activity led to
the installation of a strong-motion network composed by 20 accelerometers, 4 coupled
with 20-bits Lennartz Mars88 recorders, 12 coupled with 24-bits Reftek 130 recorders
and 4 coupled with 24-bits Gaia2 recorders. The network allow us to reduce, in the area
under study, the average inter-distances between strong-motion stations from about 40 km
(at November 2004) to 15 km. At present the network includes nine 6-channels stations
where velocity sensors work together the strong-motion ones. The data transmission is
assured by modem-gsm, with the exception of four stations that send data in real time
through a TCP/IP protocol. In order to evaluate different site responses, the stations have
been installed both in free field and near (or inside) public buildings, located in the center
of small villages. From June 2006 to December 2008 a dataset of 94 events with local
magnitude range from 0.7 to 5.1 has been collected. An ad hoc data-processing system have
been created in order to provide, after each recorded event, engineering parameters such as
peak ground acceleration (PGA) and velocity (PGV), response spectra (SA and PSV), Arias
and Housner intensities. Data dissemination is achieved through the web site http://rais.
mi.ingv.it, while the waveforms are distributed through the Italian strong motion database
(http://itaca.mi.ingv.it).
Description:
In press
Description:
1.1. TTC - Monitoraggio sismico del territorio nazionale
Description:
JCR Journal
Description:
open
Keywords:
Strong motion stations
;
Seismic networks
;
North Italy
;
Data acquisition system
;
04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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