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Old 11-12-2012, 5:24 AM
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Question us geological survey

dos anyone know there frequencies in nevada and around the us thanks
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Old 11-12-2012, 6:37 AM
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I doubt they have radios. they probably use cell phones in my honest opinion
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Old 11-12-2012, 7:31 AM
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USGS has active freqs in the SF Bay Area.
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Old 11-12-2012, 12:44 PM
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Quote:
Originally Posted by KB1UAM View Post
I doubt they have radios. they probably use cell phones in my honest opinion
The USGS has lots of frequency allocations and they are busy in the areas where the USGS is active, for sure.

From the March 2005 Fed Files column:

Searching my information about possible USGS radio frequencies turned up hundreds of them, so I dont have room to list them all, but here is what I have heard in use at Mt. St. Helens, Washington:

167.0750 MHz Input to 168.4250 repeater
168.4250 MHz Repeaters on both the north and south sides of Mt. St. Helens
168.4500 MHz Possible simplex use
169.8250 MHz USGS Nationwide

The USGS uses many different devices for monitoring the volcano and its activities, including GPS, laser-height sensing equipment as well as seismic sensors. Here are some sensor frequencies that have been heard in southern Washington:

162.1250
162.1750
162.2000
163.3970
163.6050
163.6600
163.9000
164.0060
164.6600
164.8450
165.8100
166.4180
167.8150
406.1500
409.6000
412.1250
416.5500
416.79375
417.7250


- Chris
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Old 11-12-2012, 8:46 PM
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thanks chris i will have to scann the 162-168 for them here in reno
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Old 11-12-2012, 9:34 PM
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169.8250 is a good freq to keep in and certainly seems like a common simplex freq. Areas like the San Francisco Bay Area where there's a lot of need for seismic sensors - and their backhaul - they can justify the need for several repeaters. East of there in the Valley where I'm at there are far less sensors and no repeaters, but I do hear them on 169.825 NAC 293 simplex.

I've heard of them using 900 ISM, licensed microwave and VHF for linking their sensors. In the Valley here they link via VHF.
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Old 11-14-2012, 1:54 AM
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169.825 is used in the Long Valley Caldera area near Mammoth Lakes. As far as I know the repeater is on Mammoth Mtn. and linked to Mt. Hamilton near San Jose using a 400 MHz frequency. From Hamilton there is another 400 MHz hop to Menlo Park. I've only heard data streams since narrow banding was done. I finally got tired of the noise that I've taken it out of my scanner. I know an employee that works for USGS and run into him every month or two and need to remember to ask him if it is used for voice anymore.

The Long Valley Caldera is the second most intensely geologically instrumented area in California, second only to Parkfield. The repeater is used for maintenance of the instrument network.
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Old 11-14-2012, 6:13 AM
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thanks go out to everyone. i will put all the frequencys in my scanner and see if i get any hits and will post it
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Old 11-15-2012, 6:02 AM
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Quote:
Originally Posted by Exsmokey View Post
169.825 is used in the Long Valley Caldera area near Mammoth Lakes. As far as I know the repeater is on Mammoth Mtn. and linked to Mt. Hamilton near San Jose using a 400 MHz frequency. From Hamilton there is another 400 MHz hop to Menlo Park.
There was in the analog days of USGS in SF. Everything in the Bay Area was converted to mixed mode P25 (Daniels) repeaters. None of them are linked anymore.
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