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Quake-Catcher Aims to be Largest Distributed Seismometer Network
Nature is reporting that a new distributed computing application is looking to monitor earthquake data using the accelerometer in many computing devices. In the long run, "Quake-Catcher" will hopefully be fast enough to give warning before major earthquakes. "If it works, it will be the cheapest seismic network on the planet and could operate in any country. It wouldn't be as sensitive as traditional networks of seismometers, but Lawrence says that's not the point. 'If you have only two sensors in an area, you have to have a perfect system. If you have 15 sensors in a system it [can] be less perfect. One hundred, one thousand, ten thousand -- your need for the system to be perfect becomes much smaller,' he says. 'That's really our approach -- just to have massive numbers.'"
I definitely don't mind anyone spying on my accelerometer.. besides, this definitely has some mass appeal. You're contributing to something that could really help people, not just crunch numbers for (what's the word you used oh yeah) VAPORWARE research. Plus it doesn't tear up your CPU at night. I'd be concerned about coordinated pranks, like thousands of 4channers all shaking their computers making the system think theres an apocalypse coming :)
The aggregate would be reliable, not the individual data.
Every piece of data that can be corroborated will help. Sure, wiimotes shake normally, but if all of them in L.A. start shaking.. well that is something to look at. That is what the summary alludes to with the statement that with more than 2 sensors the system can be less precise.
... what did the French call them ? oh yeah, terrorists
The fact that you could have corroboration from 1500 points in a 75 square mile area is quite an improvement on what they have now, and at a much cheaper price.
If you spend time analyzing data, it's amazing what you can find. That is one of the reasons that the US government wants to monitor everyone's communications... to spot small trends... and of course to gather evidence to use against political rivals thus ensuring their unending reign of
Back on track. The sensitivity of things like the wiimote add huge potential to such an endeavor. Just through sheer numbers, the size of the area shaking makes a big difference on the impact or relevance of the seismic event. It's physics, and if you are trying to see the true graph of something, the more data points you have to plot, the more informative it is. Even if some of the sensors are unreliable, they have the ability to ignore anomalous readings and use those that match others. Since you can be certain that there is an event happening (old system still in place) you can ignore or throw out data from sensors that are TOO active or not active at all, then sift through what is left to see what you find.
I'm reasonably certain that they will see a lot when they learn the true extent of the area affected by any particular event. For example, if the event stays limited to only the fault area it would be much different than if an entire area were affected outside the fault line area. Having thousands of sensors will help show that. Perhaps through this they will learn that certain geologic structures actually do redirect the energy to other areas, allowing predictions of damage to match what before were unpredictable events thus adding perhaps minutes to the warning times. That would save lives and that is what they want to do. Mapping effects through an area will help. Thousands of sensors will help achieve that despite the seemingly unreliability of the sensors themselves.
There are millions of ants in an ant hill, kill a couple hundred and they carry on. This is the same sort of idea.
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Improv Everywhere will have a field day with this.
I see your informative link, and raise you a pithy comment.
the thirty second warning is little better than "duck and cover" if it cannot be communicated effectively.
Actually, a 30 second warning is quite useful, but not to humans. There are such warning systems in California. When the warning system trips, elevators stop at the nearest floor, subways and BART trains stop, gas valves at schools and mobile home parks close, and some hazardous processes shut down.
But the data from that comes from fixed seismic stations, not somebody's random accelerometer.
Personally, I think this is a dud idea.
1,000 laptop accelerometers cannot do what a single seismic sensor can, because they are orders of magnitude less sensitive. You can't take 1,000 sensors, add the data together, and say it is 1,000 times more effective than a single device. If the sensor granularity is not sufficient to detect what you are trying to detect, then one or one million will not be able to detect your subject. It'd be like using one cheap VGA webam to try to photograph surface topography on Pluto, and when that didn't work, trying the same thing by using 1,000 cheap VGA webcams together.
Stupid.
I hate printers.
To extend this to a domain where you don't have the effective control, you have to automatically detect where different pictures fit. I remember having seen somebody that did this; I can't remember where, though.
Eivind.
Doubting the existence of evolution is like doubting the existence of China: It just shows that you're uninformed.