Cavola Experiment: Installation

Local array:
the installation was accomplished during the period 19-23/07/04. The installation team were:

Fabrizio Cara, Giuseppe Di Giulio, Anna Horleston, Paola Bordoni, Giuliano Milana, Gianfranco Colasanti, Marco Colasanti, Luciano Giovani, Vincenzo Cardinale, Felice Minichiello, Angela Chesi, Marco Cattaneo, John A. A Haines, Mark Haines, Justin Grounds.

The recording have started on the 19th of July 2004 and will continue until the end of October 2004.

Preparation: Prior to the installation we had to prepare the field. The plants were cut down , and we laid out the grid with the help of Pino Capone and his electronic geodimeter . A grid of 112 m x 80 m was measured and posts were set at distance of 8 meters downhill and 10 meters along the hill . The following day a digger dug the 95 holes in the places marked . We had expected a drill to make holes 40cm in diameter, but instead we got holes 130cm x 60cm .

Field Installation: The instrument was connected to the solar panel and the battery, then placed in two plastic bags and put in the hole on a few centimetres of sand. It was then oriented north, levelled and covered with sand . The sand was compacted and the level checked again . Then we communicated with the seismometer to check the levelling through the masses, the GPS lock and the streams to compile the installation sheet . The hole was then filled and the setup retested and reinitialised to eliminate the huddle test and installation noise from the recording . Finally the breakout box and cables were placed in a plastic bag , buried in a new channel and covered . Here the installation is well advanced .

Urban Installation: Four seismometers were deployed in the village of Cavola, two in private homes, one in a church and one in the nursery school. Each instrument was insulated in a polystyrene box and placed over a concrete surface . Then the GPS was put outside , power obtained and connected to the instrument .

photo gallery:
grid preparation - urban installation - array installation

Regional Array:
the installation was accomplished by: Paolo Augliera, Simone Marzorati, Ezio D'Alema, Mariano Maistrello.
A first scouting for the site selection was performed on 7th of July 2004.
The first station was installed on 8th of July (station: CABR).
This site has been used for a week to check the optimal values for acquisition parameter and station configuration.
The installation of further 4 stations (TINO, NERO, FUSO, ORSA) was accomplished during the period 13-15/07/2004.
For the regional network, the Reftek 130 acquisition systems coupled with Lennartz (Le-3D Lite, 1 hz) sensors, are used.
As for the local array, the instrument was connected to the solar panel and the battery. We use one plastic bags and we put the sensor in a small hole on a few centimeter of sand.
Every two weeks we return on the field to change the 1 Gb microdrives.
This operation has been carried out on 6-7/8/2004, 26-27/8/2004, 9-10/9/2004, 23-24/9/2004 and 7-8/10/2004.

photo gallery:
CABR - FUSO - NERO - ORSA - TINO