Here goes a little bit of geeky stuff. Raspberry Shake is a single channel electronically extended 4.5 Hz geophone with an 24 bit digitizer sampled at 50 sps (samples per second) with the data presented in miniSEED format. What a mouth full!
In other words, Raspberry Shake is sensor-digitizer that records earthquakes from about magnitude 2 and higher within a radius of 50 miles, and a magnitude 4 and higher in a radius of 300 miles. It will also record earthquakes of larger magnitudes farther away but it will miss some of the subtleties. Raspberry Shake can detect and record short period (0.5 - 15 Hz) earthquakes; the farther away an earthquake, the less of that range of frequencies can be recorded.
Raspberry Shake is the little brother of the famous and popular OSOP Sixaola short-period six-channel seismograph.
The data will be displayed with the versatile SWARM software written for the USGS Alaska Volcano Observatory. This is open and free software.
Raspberry Shake has two main components:
1) The main sensor is a geophone, a microphone for the vibrations of the earth. Geophones have been used for decades in the geophysical and oil exploration business. A geophone is a small can about the size of a salt shaker. There is a coil that moves in relation to a magnet and creates a small current.
2) The Amplifier, digitizer and ARM processor.
The small current mentioned above is then amplified with some ultra-quiet state of the art op amps. Once amplified, the signal is digitized, then that data are shipped to the ARM processor and bundled into one-second packets that are shipped to your Raspberry Pi.
The Raspberry Pi time-stamps the data and stores it in a seismic industry standard format and sends it in answer to client requests. Those requests are displayed on your smartphone or computer monitor. The complete system is called a seismograph.
The Raspberry Shake is for any person who would like to “see” the vibrations that are all around us but are generally not felt. ANY felt vibration whether it is a truck or a tremor will be detected by your Raspberry Shake. It's fun to make, fun to program, fun to watch the tremors and fun to review all of the recorded vibrations of the day on one screen.
If you don't have a Raspberry Pi yet, take a look to our "Magnitude 9.0 reward."
Don’t be fooled by the size and the price. Raspberry Shake is better than many of short-period seismometers in current use by the local networks of the USGS and many developing countries. Several software vendors have, for the first time, provided personal no-cost licenses for this project.
Raspberry Shake will make observatory quality data that can be shared in the worldwide standard SEED format. All modern automated seismology programs used by observatories can use the data from the Raspberry Shake. It's the Volkswagen of seismometers - yes there are Lamborgini seismographs but both the Lamborghini and the Volkswagen will get you from point A to point B.
These are some of the features included:
- Display data in real time locally or remotely, which means you can place your Raspberry Shake in a quiet location and see the data via internet.
- Store data in SEED format (Standard for Exchange of Earthquake Data).
- Allow sharing of real time data. Seedlink Protocol. Send alarms by email or Telegram. Off-the-shelf parts.
- Support by email and Whatsapp.
- Creats daily wave summary as a helicorder or spectrogram.
- Display-quality case.
- Industrial quality geophone sensor.
- Industrial quality 4 layer board and surface mount components.
The Raspberry Shake board has four major circuit blocks:
- The power conditioning section.
- The analog front end with the signal conditioners and the amplifiers.
- The digitizer section where the analog signals are converted to ones and zeros.
- The main processor where the digital signals are bundled and sent via RS232 to the Raspberry Pi.
The Raspberry Shake shield is compatible with almost all Raspberry Pi models. With any Raspberry Pi B, B+, 2 B and 3 you should be able to see waves coming from Raspberry Shake.
The shield uses only three signal connections in addition to the Power and Ground pins.
This is how you connect your Raspberry Shake to Raspberry Pi. Just plug it into the top of the Raspberry Pi's 40 pin header (or the 26 pin header for other models).
On the 40 pin header the Raspberry Shake use five pins:
- Power / RPi Pin 2
- Ground / RPi Pin 6
- TX / RPi Pin 8
- RX / RPi Pin 10
- Reset / RPi Pin 15 / GPIO 22
All other pins are unused. As you can see, if you are a tinkerer, a maker, a hobbyist or an EE you can connect the Raspberry Shake to any single board computer that has TX/RX.
The Raspberry Shake team has huge experience creating seismometers (we do it for a living) and it's our passion. We have all kinds of instruments and are constantly seeking ways to make more and better ones.
The Raspberry Shake is a little brother of a seismograph for local and regional earthquakes that our team makes for universities and national seismic observatories. We sell one model for several thousand dollars. We have taken the same geophone sensor, made the electronics a bit simpler and mounted it all on a Raspberry Pi. Then adapted the software to work on the Raspberry Pi. Once that was done, we could use Open Source Software used by the USGS. The data is stored in a format fully compatible with the USGS and seismic observatories all over the world. If you choose, you can share your data with the rest of the world.
Along with the book Personal Seismology you can learn the basics of recognizing small local and regional earthquakes. In many cases these quakes are undetectable because the government observatories don’t have enough stations and the detectable energy from small quakes does not travel far.
You can set up a web page that shows the data in the form of a helicorder and share that data. The USGS program Heli_ewII makes the capture of the data for daily helicorders and web page creation easy.
In the image below you can see several small earthquakes, once you know what to look for. With other tools covered in the book Personal Seismology you can expand and analyze those small quakes.
The figure above shows the graphic user interface that has been produced by the USGS’s famous and popular program called SWARM (which you will download for free). What you see is 24 hours of continuous data in a format that used to be called a helicorder and some seismologists now call a webicorder. The red indicators show where certain user-selectable limits were exceeded and are small earthquakes. The expanded section shows a “text book” local earthquake about 30 kilometers away and around a magnitude 3. The book Personal Seismology will explain how to use SWARM and how to estimate the distance and magnitude.
Raspberry Shake will allow you to monitor ground motion from your computer terminal or smartphone. You will be able to record the motion of 24 hours for your review in a single screen and examine close-up any little portion of the recording.
The image above shows how your Raspberry Shake roughly compares to a $50,000 professional seismograph. The upper expanded image is from a Raspberry Shake and the lower expanded image is from a Nanometric Trillium Compact broadband sensor connected to a Kenda Earthdata true 24 bit digitizer. Both charts show the same regional earthquake.
Being able to do this is simply remarkable. Just a few years ago it was possible with massive investments that only governments and universities could afford. Raspberry Shake brings this ability to everyone.
Movers and Shakers: Thanks for your contribution! Get updates, and be on the Movers and Shakers section of our website.
This is the complete guide to personal seismology with your Raspberry Shake. We explain in simple non-technical terms and many examples what you see and how to interpret it. It covers all aspects of enjoying your Raspberry Shake. You will also be on our Movers and Shakers section.
This is our main benefit. This board plugs right on to Raspberry Pi and start sends data through the RS232 serial port.
If you already have your Raspberry Pi, this reward is for you. You get the Raspberry Shake board and the seismic sensor, the geophone. These are brand new and tested to make sure that you get the most out of your seismograph.
This gives you everything except for the Raspberry Pi itself. Add the RPi and things will boot right up.
This is the full meal deal, ready to run right out of the box. You get a fully functional seismograph that is better than what some third world observatories have. It includes all of the hardware and all of the software. You can be up and running in no time. You will also get direct personal support via the community forum, email and Whatsapp.
The team at OSOP is 14 members strong! Only four of us are directly working on Raspberry Shake, but we could not do it without the rest of the team, especially the programmers. Raspberry Shake utilizes several thousand hours of code that OSOP has produced and many many more hours of other people's open source code. 95% of the work is in the software and it is the software that makes Raspberry Shake special. Raspberry Shake speaks in the language of SEED: Standard for Exchange of Earthquake Data. This language makes it a real seismograph and not a curiosity that makes wiggly lines. We especially thank the team that wrote GFZ Seiscomp 2.6 and the team that wrote USGS SWARM. Special thanks to OSOP team members Dave, Thomas and Branden.
$15,000 We will write the software so you can securely share your data through a central server with other Raspberry Shake users and national seismic observatories. Even more importantly, the data from your Shake will be available to the USGS and other national seismic networks.
$25,000 We will make a website to display all the shared Raspberry Shake stations around the world on an interactive web-based real-time world map.
$50,000 We will provide real time automatic global earthquake locations on your computer using your Raspberry Shake, other Raspberry Shakes and open seismic stations. This will be a better network than many nations had just a scant 10 years ago. $50,000 will make this happen!
Most of the work is done. Raspberry Shake is working. Most of the components are off the shelf: geophone, RPi. We make the acrylic box in our shops. This Kickstarter campaign will allow us to make the production version of the Raspberry Shake board. We will also unify all the little bits of software and get them to be nice to each other.
We will have product in the mail late October or early November, in time for gift-giving. Here is our timeline:
Thank you so much for checking us out! We hope to have you on board very soon. Please drop us a line or leave a comment in the campaign if you have any questions, we would be happy to help you.
Check out our Press Kit: https://github.com/osopsa/raspberryshake-press-releases
Risks and challenges
We don’t see much risk but of course it exists. Most of the viewing and analysis software is already in day to day scientific use by the USGS. When we raise our pledge amount we will have enough funds for the first run of boards, and after that it is mostly carpentry. Most of the risk is in terms of delays in time to delivery; everything will be on track if we make no changes to the hardware and do not add any new software. As makers we always want to tinker and improve things and I know that we are looking at some different op amp. We promise to weigh every decision in relation to the promised delivery time. We will post updates often.
We promise that when we make our goal, all of our supporters will get their Raspberry Shake, and we will also give you any and all the support you need to get it up and running.Learn about accountability on Kickstarter
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