Wireless sensor networks represent a new kind of computing platform. They consist of small, low-power, wireless devices merging sensors with a small amount of computing power and storage. Sensor networks have been explored for applications such as habitat monitoring, medical care, and seismic analysis of structures; this effort is believed to be the first such application of wireless sensor networks to volcanic monitoring.
“This is a proof-of-concept that wired systems for monitoring volcanic activity can be replaced with wireless arrays,” Welsh says. “Specifically, our work indicates that wireless systems can be used to follow long-term trends in volcanic activity that are of great interest to researchers. This long-term observation entails copious amounts of data that is difficult to obtain with wired monitoring systems. Seismologists are very excited about the possibilities here.”
Seismologists and volcanologists use both seismic and infrasonic signals to monitor volcanic activity. Seismometers provide information on seismic waves propagating through the earth, but are poorly suited to discriminating eruptions from other activity such as earthquakes or mining operations. Infrasound waves, with a wavelength of less than 20 hertz, are characteristic of explosions and provide additional information not available with seismic monitoring.
Welsh and his colleagues now plan to develop a wireless seismometer to augment their infrasound array. The researchers also intend to deploy a larger network of some 20 nodes on Tungarahua, and may place wireless sensor networks on several other active volcanoes.
Welsh’s colleagues on this project are Geoff Werner-Allen at Harvard, Jeff Johnson at the University of New Hampshire, Mario Ruiz at the University of North Carolina and the Instituto Geofco of the Escuela Politecnica Nacional in Ecuador, and Jonathan Lees at the University of North Carolina.
Researching this story has been an eyeopener. I put up a wireless link a few months ago to use my laptop to surf the internet while I’m in bed and sitting by the goldfish pool in the backyard garden – it works quite well. I posted that “wifi hot spot” link above and then said, hmm, wonder if I’m in it? Well, I’m not, but my street is there, and looks like several of my neighbors a fw blocks away have got home hot spots of their own up. Now I realize (a) people wardrive in my neighborhood so (b) I’d better get my firewall up and running and then (c) go see if my neighbors have got theirs up. And if not…
Definitely a good idea. Don’t connect to the internet without one :-)
I downloaded Netstumbler onto my Dell D800 laptop and drove around my neighborhood for 15 minutes last night and found literally two dozen hot spots at least. Dude, just like that I’m a wardriver – now I want a GPS card for Christmas. Who knows, after the shock wears off I may just start parking by the curb and seeing if they’ve got THEIR firewalls set up…
This could be more fun than poker.