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Environmental Monitoring (Environmental Monitoring)

fiori, tringali, quemener, lunghini - 14:01 Monday 16 February 2026 (68692)

sensors at 1500W

We installed one accelerometer and one microphone inside the 1500W building.

One meggit accelerometer is placed on the concrete floor, veritcally oriented, close to the INGV gravimeter inside the Fiber Lab: picture 1.

channel name is SQZ_ACC_1500W_SQZ ADC, more info in https://apps-online.virgo-gw.eu/squeezing/?r=857

One GRASS AZ46 microphone is placed in the Bd. hall: picture 2.

channel name is W1500_ENV_1500W_MIC, it is read from the DAQ box used for the ROBOT* sensors: https://vpmrd.virgo.infn.it:40000/main.html, W1500_dbox, W1500_ADC0

Images attached to this report

68692_1771246734_858_1770737424_Screenshot 2026-02-10 alle 16.30.20.png

68692_1771246916_WhatsApp Image 2026-02-16 at 11.46.31.png

Comments to this report:

fiori - 12:55 Wednesday 27 May 2026 (69135)

Graphs show data of the accelerometer installed (vertical) on the floor next to the Gravimeter. Fig.1 shows that the noise conditions is more or less stable over 24 hours. Figure 2 compares the spectral noise with one accelerometer sensor (vertical) on the CEB floor (near Guralp). The Fiber lab floor is noisier above 10Hz and below 1Hz.

Images attached to this comment

fiori, kraja - 16:27 Wednesday 27 May 2026 (69137)

Since May 17 the gravimeter was not reachable from remote. This has been fixed today. Attached are two pictures of the gravimeter (Fig.1) and the laser box (Fig.2).

The issue was with the USB-to-RJ45 adapter, which for some reason was not working properly (the network communication LEDs were off, and the network interface was also disconnected from the console). After unplugging and reconnecting it, the connection was restored, but it went down again a few minutes later. The procedure was repeated, and the connection was re-established. Now, after returning, the machine appears to still be up and running.

Images attached to this comment