Global network of seismographic sensors,
for early detection of earthquakes, connected to SDRs

Does SDR (software defined radio)
suitable for transmitting sensor data to a server ?

What is the bandwidth, transfer speed
and how many such devices are already in operation and occupying the bandwidth

Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.

What range is possible and how much does it cost ?

If anyone has experience with operating
such a remote radio sensor system, I would appreciate your opinion.

If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.

The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.

Translated with www.DeepL.com/Translator (free version)

>

Yet one more #veryStupidByLowIQaa post.

On Saturday, February 18, 2023 at 9:48:46 AM UTC-5, a a wrote:
> Global network of seismographic sensors,
> for early detection of earthquakes, connected to SDRs
>
> Does SDR (software defined radio)
> suitable for transmitting sensor data to a server ?
>
> What is the bandwidth, transfer speed
> and how many such devices are already in operation and occupying the bandwidth
>
> Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
>
> What range is possible and how much does it cost ?
>
> If anyone has experience with operating
> such a remote radio sensor system, I would appreciate your opinion.
>
> If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
>
> The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
>
> Translated with www.DeepL.com/Translator (free version)

You don't need to fret over this. Global networks are already in place, even in Turkey.

https://www.usgs.gov/programs/earthquake-hazards/science/earthquake-early-warning-around-world

On Sunday, 19 February 2023 at 04:02:19 UTC+1, Fred Bloggs wrote:
> On Saturday, February 18, 2023 at 9:48:46 AM UTC-5, a a wrote:
> > Global network of seismographic sensors,
> > for early detection of earthquakes, connected to SDRs
> >
> > Does SDR (software defined radio)
> > suitable for transmitting sensor data to a server ?
> >
> > What is the bandwidth, transfer speed
> > and how many such devices are already in operation and occupying the bandwidth
> >
> > Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> >
> > What range is possible and how much does it cost ?
> >
> > If anyone has experience with operating
> > such a remote radio sensor system, I would appreciate your opinion.
> >
> > If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> >
> > The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
> >
> > Translated with www.DeepL.com/Translator (free version)
> You don't need to fret over this. Global networks are already in place, even in Turkey.
>
> https://www.usgs.gov/programs/earthquake-hazards/science/earthquake-early-warning-around-world

Thank you my friend for your kind reply.

What I mean and work on, is early prediction of earthquakes.

What is offered and discussed by USGS is:

"Time to Detect an Event

An earthquake early warning system on the west coast of the United States could provide up to tens of seconds of warning prior to shaking arriving. The time required to detect and issue a warning for an earthquake is dependent on several factors:

Distance between the earthquake source and the closest seismic network seismometer (station). It takes a finite amount of time (3–4 miles per second) for the first seismic waves to travel from the source (e.g. the point on a fault that is breaking) to the seismic station. Therefore, the closer a station is to where an earthquake begins, the more rapidly the earthquake can be detected. Accurate detections often depend on multiple ground motion measurements from more than one station; so, increasing the density of stations near the fault can improve detection times.
Transfer of information to the regional networks. Data from multiple stations is collected and analyzed by the regional seismic networks, so ground motion information must be transferred from the station to the processing center. Existing networks use a variety of methods to send data back to the server to improve robustness, including radio links, phone lines, public/private internet, and satellite links. In addition, delays from packaging and sending the data from the station must be minimized to provide useful warning times.
Detection and characterization of an earthquake. Ground motion records received from the stations in real time are used to detect an earthquake and rapidly determine an initial location and magnitude of the event. We are developing multiple algorithms to estimate the earthquake information as rapidly as possible. Earthquakes can continue to grow in size over many seconds (the larger the earthquake generally the longer it takes to get to the final size), so magnitude estimates can also change through time as the evolving earthquake is tracked.
Shaking intensity threshold used to issue an alert. Alerts are issued for a region when the expected ground shaking intensity is above a minimum threshold. Alerts can be provided more quickly for low thresholds of ground shaking because the system doesn’t need to wait as long for the earthquake magnitude to grow (larger earthquakes produce high ground shaking intensities).

So GIS system by USGS is 50 years old and has no functionality to predict the coming earthquakes implemented.

The same for Japan, Turkey, USA.

There is no system to offer early preduction of the coming strong earthquake,
so about a million of humans died in earthquakes in the past and more to come.

It doesn't matter if the numb er of sensors is 10, 100 or a million.

They are not part of any
Earthquake Prediction System

they are part of the
Earthquake Early Warning Around the World

as discussed by USGS

https://earthquake.usgs.gov/earthquakes/map/?extent=31.8589,28.89404&extent=45.93587,49.98779&range=month&magnitude=all&sort=oldest&listOnlyShown=true

To save lives, thousands of lives,
\we need
High-Tech Smart Earthquake Prediction System

I am working on
so I need
Software Defined Radio (SDR) based sensors to be burried in the ground in your backyard to build such system and have it operated by the peers (Citizen Scientists by NASA)

can you help ?

Next week I hope to buy SDR receivers

I am looking for seismographic sensors, which can be connected to SDR tramitters
since radio is safe in regions affected by the earthquake, demolishing local Internet networks.

So I need
- seismographic sensors
- SDR transmitters
- protocols
- software to be run on the receiving side to receive, save and process the transmitted data from the sensors real-time

>

Yet one more #veryStupidByLowIQaa post.

On Sat, 18 Feb 2023 06:48:42 -0800 (PST), a a <manta103g@gmail.com>
wrote:

>Global network of seismographic sensors,
>for early detection of earthquakes, connected to SDRs
>
>Does SDR (software defined radio)
>suitable for transmitting sensor data to a server ?

Yes, why not, but why does it have to be SDR ?

>What is the bandwidth, transfer speed
>and how many such devices are already in operation and occupying the bandwidth

You haven't specified anything so that one could determine what you
need.

>Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.

What is the bandwidth of these sensors so one could determine the
sampling rate needed (if digital transfer). What is the required
dynamic range needed, thus is some analog modulation sufficient or
must digital transfer be used.

How about timing accuracy, must a GPS clock be used and timing
information transmitted with actual data ?

To my understanding seismic signals have only a few Hz of bandwidth,
so you could put a few signals into a 3 kHz audio bandwidth and use
any voice grade radio for communication.

>What range is possible and how much does it cost ?

With voice grade radios 1500 - 2500 km on HF with 5-100 W is easy.
However, due to the limited frequencies available, only a very limited
number of stations can operate simultaneously worldwide.

Alternatively using some cheap VHF/UHF radio telephones the range
would be a few kilometers.

For higher data rates, some WLAN and hundreds of meters is easy.

A shorter range also means you can have more active stations in an
area. That is the same frequency is reused again at some distance.
This is also the principle of any cellular network.

>
>If anyone has experience with operating
>such a remote radio sensor system, I would appreciate your opinion.

First specify how much data you want to transfer and what is the
required distance.

>
>If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
>
>The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.

If you are going to use a huge number of stations, the number of
available frequencies determines how far the sensor and servers are
from each other. With multiple servers, you need to consider how to
transfer data between servers or to a higher level for further
processing.

By the way, if the system is supposed to work _before_ the earthquake
occurs, why not use ordinary internet. Sure, the internet or any
cellular phone may be down after the earthquake, but we all know that
it has happened, no need for the network any more.

On Monday, 20 February 2023 at 11:03:57 UTC, upsid...@downunder.com wrote:
> On Sat, 18 Feb 2023 06:48:42 -0800 (PST), a a <mant...@gmail.com>
> wrote:
> >Global network of seismographic sensors,
> >for early detection of earthquakes, connected to SDRs
> >
> >Does SDR (software defined radio)
> >suitable for transmitting sensor data to a server ?
> Yes, why not, but why does it have to be SDR ?
> >What is the bandwidth, transfer speed
> >and how many such devices are already in operation and occupying the bandwidth
> You haven't specified anything so that one could determine what you
> need.
> >Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> What is the bandwidth of these sensors so one could determine the
> sampling rate needed (if digital transfer). What is the required
> dynamic range needed, thus is some analog modulation sufficient or
> must digital transfer be used.
>
> How about timing accuracy, must a GPS clock be used and timing
> information transmitted with actual data ?
>
> To my understanding seismic signals have only a few Hz of bandwidth,
> so you could put a few signals into a 3 kHz audio bandwidth and use
> any voice grade radio for communication.
> >What range is possible and how much does it cost ?
> With voice grade radios 1500 - 2500 km on HF with 5-100 W is easy.
> However, due to the limited frequencies available, only a very limited
> number of stations can operate simultaneously worldwide.
>
> Alternatively using some cheap VHF/UHF radio telephones the range
> would be a few kilometers.
>
> For higher data rates, some WLAN and hundreds of meters is easy.
>
> A shorter range also means you can have more active stations in an
> area. That is the same frequency is reused again at some distance.
> This is also the principle of any cellular network.
> >
> >If anyone has experience with operating
> >such a remote radio sensor system, I would appreciate your opinion.
> First specify how much data you want to transfer and what is the
> required distance.
> >
> >If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> >
> >The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.

There is just one problem with this. Nobody knows how to predict an earthquake
a week in advance without false alarms. After a large area has been evacuated
for a predicted earthquake that doesn't happen the system will never be believed again.

John

> If you are going to use a huge number of stations, the number of
> available frequencies determines how far the sensor and servers are
> from each other. With multiple servers, you need to consider how to
> transfer data between servers or to a higher level for further
> processing.
>
> By the way, if the system is supposed to work _before_ the earthquake
> occurs, why not use ordinary internet. Sure, the internet or any
> cellular phone may be down after the earthquake, but we all know that
> it has happened, no need for the network any more.

On Sunday, 19 February 2023 at 04:02:19 UTC+1, Fred Bloggs wrote:
> On Saturday, February 18, 2023 at 9:48:46 AM UTC-5, a a wrote:
> > Global network of seismographic sensors,
> > for early detection of earthquakes, connected to SDRs
> >
> > Does SDR (software defined radio)
> > suitable for transmitting sensor data to a server ?
> >
> > What is the bandwidth, transfer speed
> > and how many such devices are already in operation and occupying the bandwidth
> >
> > Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> >
> > What range is possible and how much does it cost ?
> >
> > If anyone has experience with operating
> > such a remote radio sensor system, I would appreciate your opinion.
> >
> > If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> >
> > The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
> >
> > Translated with www.DeepL.com/Translator (free version)
> You don't need to fret over this. Global networks are already in place, even in Turkey.
>
> https://www.usgs.gov/programs/earthquake-hazards/science/earthquake-early-warning-around-world
Thank you my friend for your kind reply.

What I mean and work on, is early prediction of earthquakes.

What is offered and discussed by USGS is:

"Time to Detect an Event

An earthquake early warning system on the west coast of the United States could provide up to tens of seconds of warning prior to shaking arriving. The time required to detect and issue a warning for an earthquake is dependent on several factors:

Distance between the earthquake source and the closest seismic network seismometer (station). It takes a finite amount of time (3–4 miles per second) for the first seismic waves to travel from the source (e.g. the point on a fault that is breaking) to the seismic station. Therefore, the closer a station is to where an earthquake begins, the more rapidly the earthquake can be detected. Accurate detections often depend on multiple ground motion measurements from more than one station; so, increasing the density of stations near the fault can improve detection times.
Transfer of information to the regional networks. Data from multiple stations is collected and analyzed by the regional seismic networks, so ground motion information must be transferred from the station to the processing center. Existing networks use a variety of methods to send data back to the server to improve robustness, including radio links, phone lines, public/private internet, and satellite links. In addition, delays from packaging and sending the data from the station must be minimized to provide useful warning times.
Detection and characterization of an earthquake. Ground motion records received from the stations in real time are used to detect an earthquake and rapidly determine an initial location and magnitude of the event. We are developing multiple algorithms to estimate the earthquake information as rapidly as possible. Earthquakes can continue to grow in size over many seconds (the larger the earthquake generally the longer it takes to get to the final size), so magnitude estimates can also change through time as the evolving earthquake is tracked.
Shaking intensity threshold used to issue an alert. Alerts are issued for a region when the expected ground shaking intensity is above a minimum threshold. Alerts can be provided more quickly for low thresholds of ground shaking because the system doesn’t need to wait as long for the earthquake magnitude to grow (larger earthquakes produce high ground shaking intensities).

So GIS system by USGS is 50 years old and has no functionality to predict the coming earthquakes implemented.

The same for Japan, Turkey, USA.

There is no system to offer early preduction of the coming strong earthquake,
so about a million of humans died in earthquakes in the past and more to come.

It doesn't matter if the numb er of sensors is 10, 100 or a million.

They are not part of any
Earthquake Prediction System

they are part of the
Earthquake Early Warning Around the World

as discussed by USGS

https://earthquake.usgs.gov/earthquakes/map/?extent=31.8589,28.89404&extent=45.93587,49.98779&range=month&magnitude=all&sort=oldest&listOnlyShown=true

To save lives, thousands of lives,
\we need
High-Tech Smart Earthquake Prediction System

I am working on
so I need
Software Defined Radio (SDR) based sensors to be burried in the ground in your backyard to build such system and have it operated by the peers (Citizen Scientists by NASA)

can you help ?

Next week I hope to buy SDR receivers

I am looking for seismographic sensors, which can be connected to SDR tramitters
since radio is safe in regions affected by the earthquake, demolishing local Internet networks.

So I need
- seismographic sensors
- SDR transmitters
- protocols
- software to be run on the receiving side to receive, save and process the transmitted data from the sensors real-time

On Monday, 20 February 2023 at 12:03:57 UTC+1, upsid...@downunder.com wrote:
> On Sat, 18 Feb 2023 06:48:42 -0800 (PST), a a <mant...@gmail.com>
> wrote:
> >Global network of seismographic sensors,
> >for early detection of earthquakes, connected to SDRs
> >
> >Does SDR (software defined radio)
> >suitable for transmitting sensor data to a server ?
> Yes, why not, but why does it have to be SDR ?
> >What is the bandwidth, transfer speed
> >and how many such devices are already in operation and occupying the bandwidth
> You haven't specified anything so that one could determine what you
> need.
> >Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> What is the bandwidth of these sensors so one could determine the
> sampling rate needed (if digital transfer). What is the required
> dynamic range needed, thus is some analog modulation sufficient or
> must digital transfer be used.
>
> How about timing accuracy, must a GPS clock be used and timing
> information transmitted with actual data ?
>
> To my understanding seismic signals have only a few Hz of bandwidth,
> so you could put a few signals into a 3 kHz audio bandwidth and use
> any voice grade radio for communication.
> >What range is possible and how much does it cost ?
> With voice grade radios 1500 - 2500 km on HF with 5-100 W is easy.
> However, due to the limited frequencies available, only a very limited
> number of stations can operate simultaneously worldwide.
>
> Alternatively using some cheap VHF/UHF radio telephones the range
> would be a few kilometers.
>
> For higher data rates, some WLAN and hundreds of meters is easy.
>
> A shorter range also means you can have more active stations in an
> area. That is the same frequency is reused again at some distance.
> This is also the principle of any cellular network.
> >
> >If anyone has experience with operating
> >such a remote radio sensor system, I would appreciate your opinion.
> First specify how much data you want to transfer and what is the
> required distance.
> >
> >If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> >
> >The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
> If you are going to use a huge number of stations, the number of
> available frequencies determines how far the sensor and servers are
> from each other. With multiple servers, you need to consider how to
> transfer data between servers or to a higher level for further
> processing.
>
> By the way, if the system is supposed to work _before_ the earthquake
> occurs, why not use ordinary internet. Sure, the internet or any
> cellular phone may be down after the earthquake, but we all know that
> it has happened, no need for the network any more.

thank you my friend for your kind reply

I know the limits but we must act quickly.

Just look at the map of earthquakes in Turkey for the last 31 days

https://earthquake.usgs.gov/earthquakes/map/?extent=30.92108,31.86035&extent=45.16655,45.92285&range=month&magnitude=all&sort=oldest&listOnlyShown=true&settings=true

There are hundreds, thousands of seismographic sensors already deployed but they work for
Early Detection of Earthquake Systems

https://www.usgs.gov/programs/earthquake-hazards/science/earthquake-early-warning-around-world

https://www.usgs.gov/programs/earthquake-hazards

what matters for those living in Turkey today is
Earthquake Early Prediction System (one-week ahead prediction system - under development)
to save 50,000 lives in the next earthquake coming in Turkey

Since I build such system to be operated by the peers, local residents, with seismographic sensors buried underground
in one's backyard, outdoor sensors must be reliable, get power from solar + powerbank and come with radio transmitters.

I read about 2 projects, SDR can read signals from outdoor weather sensors, so I would like to have temperature sensor replaced with radon sensor to work for SDR.

Seismographic sensors are much complicated since signal should be sampled frequently and FFT processed to detect signatures of infrasonic vibrations .

Since low-cost smartphones come with many built-in sensors like accelerometers
I plan to place one smarthpone in the ground in water-proof shell and have power supply and signal transmitted via usb cable.
\ FFT app can be installed and run 24/365, ejecting infrasonic vibration signatures only, so bandwidth and data transfer can be limited to alerts only.

I am interested in ready made low-cost solutions since no way to fly to Turkey, install servers, have admin, build mesh network.

3G, 4G LTE communication is nice but can be limited in mountain regions, so I opt for SDR.

System must be easy to operate locally, generating data, data charts like home weather station,
so no risk to generate false positive alarms.

"Better Know System"

https://earthquake.usgs.gov/earthquakes/map/?extent=35.51434,35.29358&extent=39.13006,40.56702&range=month&magnitude=all&sort=oldest&listOnlyShown=true&baseLayer=satellite

It's easy to notice, location of quakes in Turkey matches bounderies between tectonic planes, moving to Black Sea, to seperate Arabian tectonic plate from Turkey in a future.

Mountain regions in Yurkey are not densely populated or populated at all, so no risk for false positive alarms, generating problems.

--
System is aimed to work as 1 week Earthquake Prediction System

--

collected a number of relevant website
and added my comments on using smartphone with sensors as seismographic station

---

https://www.src.com.au/choosing-an-earthquake-sensor/

--

https://www.src.com.au/choosing-an-earthquake-sensor/

---
https://en.wikipedia.org/wiki/Plate_tectonics

----
https://www.sdr-radio.com/

Reading Weather Data with Software-Defined Radio

https://www.linux-magazine.com/Online/Features/Reading-Weather-Data-with-Software-Defined-Radio

Software Defined Radio (SDR) Weather Station

https://github.com/BrucesHobbies/sdrWeatherStn

Detecting seismic waves using Software Defined Radio

https://earthscience.stackexchange.com/questions/8594/detecting-seismic-waves-using-software-defined-radio

Waves, Seismograms, and Seismometers

http://eqseis.geosc.psu.edu/cammon/HTML/Classes/IntroQuakes/Notes/seismometers.html

Normal mode

https://en.wikipedia.org/wiki/Normal_mode#Earth

Raspberry Shake – your personal seismograph

https://www.raspberrypi.com/news/raspberry-shake-personal-seismograph/

ObsPy is an open-source project dedicated to provide a Python framework for processing seismological data

https://github.com/obspy/obspy/wiki

https://docs.obspy.org/gallery.html

https://github.com/obspy/obspy/wiki

----
Smartphone comes with

accelerometer
gyroscope
magnetometer
GPS
temperature sensor

and high power processor, USB connectivity, battery, a lot of software, like FFT to generate signatures of infrasonic
vibrations

https://gizmodo.com/all-the-sensors-in-your-smartphone-and-how-they-work-1797121002

Connecting smartphone to radio transmitter to send processed data formatted, time stamped, geolocated
seems to be nice solution
to have SDR to receive transmitted data remotely.

Let me know your opinion since I am looking for working, pretested solutions
and start experiuments with sensors in smartphone today.

thank you

On Sunday, February 19, 2023 at 11:33:19 PM UTC-5, Anthony William Sloman wrote:
> On Monday, February 20, 2023 at 6:06:34 AM UTC+11, a a wrote:
> > On Sunday, 19 February 2023 at 04:02:19 UTC+1, Fred Bloggs wrote:
> > > On Saturday, February 18, 2023 at 9:48:46 AM UTC-5, a a wrote:
> > > > Global network of seismographic sensors,
> > > > for early detection of earthquakes, connected to SDRs
> > > >
> > > > Does SDR (software defined radio)
> > > > suitable for transmitting sensor data to a server ?
> > > >
> > > > What is the bandwidth, transfer speed
> > > > and how many such devices are already in operation and occupying the bandwidth
> > > >
> > > > Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> > > >
> > > > What range is possible and how much does it cost ?
> > > >
> > > > If anyone has experience with operating
> > > > such a remote radio sensor system, I would appreciate your opinion.
> > > >
> > > > If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> > > >
> > > > The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
> > > >
> > > > Translated with www.DeepL.com/Translator (free version)
> > > You don't need to fret over this. Global networks are already in place, even in Turkey.
> > >
> > > https://www.usgs.gov/programs/earthquake-hazards/science/earthquake-early-warning-around-world
> > Thank you my friend for your kind reply.
> >
> > What I mean and work on, is early prediction of earthquakes.
> <snipped a a being as stupid as ever>
>
> People have been working on the early prediction of earthquakes since seismometers were invented. You do get clusters of small quakes before a major earthquake, but you get lots more clusters of small quakes that don't precede anything. Monitoring ground displacement accurately has become possible in recent years, but that doesn't help either.

Animals know when a big one is imminent, and leave the area. If they drop all this medieval physics and technology hacks and use more biological sensing, they would have it. Even USGS is looking at it.

https://www.usgs.gov/programs/earthquake-hazards/animals-earthquake-prediction

It's clear they have a 'tude and are more interested in dispelling the idea as myth. That's because they're cavemen.

>
> --
> Bill Sloman, Sydney

On Monday, 20 February 2023 at 12:20:26 UTC+1, John Walliker wrote:
> On Monday, 20 February 2023 at 11:03:57 UTC, upsid...@downunder.com wrote:
> > On Sat, 18 Feb 2023 06:48:42 -0800 (PST), a a <mant...@gmail.com>
> > wrote:
> > >Global network of seismographic sensors,
> > >for early detection of earthquakes, connected to SDRs
> > >
> > >Does SDR (software defined radio)
> > >suitable for transmitting sensor data to a server ?
> > Yes, why not, but why does it have to be SDR ?
> > >What is the bandwidth, transfer speed
> > >and how many such devices are already in operation and occupying the bandwidth
> > You haven't specified anything so that one could determine what you
> > need.
> > >Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> > What is the bandwidth of these sensors so one could determine the
> > sampling rate needed (if digital transfer). What is the required
> > dynamic range needed, thus is some analog modulation sufficient or
> > must digital transfer be used.
> >
> > How about timing accuracy, must a GPS clock be used and timing
> > information transmitted with actual data ?
> >
> > To my understanding seismic signals have only a few Hz of bandwidth,
> > so you could put a few signals into a 3 kHz audio bandwidth and use
> > any voice grade radio for communication.
> > >What range is possible and how much does it cost ?
> > With voice grade radios 1500 - 2500 km on HF with 5-100 W is easy.
> > However, due to the limited frequencies available, only a very limited
> > number of stations can operate simultaneously worldwide.
> >
> > Alternatively using some cheap VHF/UHF radio telephones the range
> > would be a few kilometers.
> >
> > For higher data rates, some WLAN and hundreds of meters is easy.
> >
> > A shorter range also means you can have more active stations in an
> > area. That is the same frequency is reused again at some distance.
> > This is also the principle of any cellular network.
> > >
> > >If anyone has experience with operating
> > >such a remote radio sensor system, I would appreciate your opinion.
> > First specify how much data you want to transfer and what is the
> > required distance.
> > >
> > >If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> > >
> > >The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
> There is just one problem with this. Nobody knows how to predict an earthquake
> a week in advance without false alarms. After a large area has been evacuated
> for a predicted earthquake that doesn't happen the system will never be believed again.

If you get access to seismograms from the past, you can analyze how past events were followed by the real, strong earthquakes.

We are the humans to find the right solution.

Today, hundreds , thousands of seismographic sensors are operated by systems in Japan, USA, Asia
but access to seismograms is limited, closed to the peers or NASA Citizen Scientists like me
so I need to install sensors in Turkey ASAP and start recording signatures of infrasonic vibrations for analysis.

Turkey is highly active seismic region and can be easily communicated.

I can donate some seismic sensors for free , for personal test and use.

Smartphones with sensors look to be a nice option to have $50 computer + accelerometer + software + data communication ports all-in-one.

On Monday, 20 February 2023 at 15:48:58 UTC+1, Fred Bloggs wrote:
> On Sunday, February 19, 2023 at 11:33:19 PM UTC-5, Anthony William Sloman wrote:
> > On Monday, February 20, 2023 at 6:06:34 AM UTC+11, a a wrote:
> > > On Sunday, 19 February 2023 at 04:02:19 UTC+1, Fred Bloggs wrote:
> > > > On Saturday, February 18, 2023 at 9:48:46 AM UTC-5, a a wrote:
> > > > > Global network of seismographic sensors,
> > > > > for early detection of earthquakes, connected to SDRs
> > > > >
> > > > > Does SDR (software defined radio)
> > > > > suitable for transmitting sensor data to a server ?
> > > > >
> > > > > What is the bandwidth, transfer speed
> > > > > and how many such devices are already in operation and occupying the bandwidth
> > > > >
> > > > > Radon, seismographic and other sensors will be installed underground in the gardens of private individuals, powered by solar and the generated seismograms are to be transmitted by radio to the server, without using the Internet.
> > > > >
> > > > > What range is possible and how much does it cost ?
> > > > >
> > > > > If anyone has experience with operating
> > > > > such a remote radio sensor system, I would appreciate your opinion.
> > > > >
> > > > > If SDR is not suitable for this, then I would appreciate an answer as to what the problems will be.
> > > > >
> > > > > The sensors will be a few at first, and then a global network of thousands of sensors to detect an incoming earthquake a week in advance and make a safe evacuation of residents.
> > > > >
> > > > > Translated with www.DeepL.com/Translator (free version)
> > > > You don't need to fret over this. Global networks are already in place, even in Turkey.
> > > >
> > > > https://www.usgs.gov/programs/earthquake-hazards/science/earthquake-early-warning-around-world
> > > Thank you my friend for your kind reply.
> > >
> > > What I mean and work on, is early prediction of earthquakes.
> > <snipped a a being as stupid as ever>
> >
> > People have been working on the early prediction of earthquakes since seismometers were invented. You do get clusters of small quakes before a major earthquake, but you get lots more clusters of small quakes that don't precede anything. Monitoring ground displacement accurately has become possible in recent years, but that doesn't help either.
> Animals know when a big one is imminent, and leave the area. If they drop all this medieval physics and technology hacks and use more biological sensing, they would have it. Even USGS is looking at it.
>
> https://www.usgs.gov/programs/earthquake-hazards/animals-earthquake-prediction
>
> It's clear they have a 'tude and are more interested in dispelling the idea as myth. That's because they're cavemen.
>
Every human is like an animal and can detect infrasounds (infrasonic vibrations) transmitted through the ground.
Infrasounds are detected by human's head

>

Yet one more #veryStupidByLowIQaa post.

>

Yet one more #veryStupidByLowIQaa post.

>

Yet one more #veryStupidByLowIQaa post.

>

Yet one more #veryStupidByLowIQaa post.