Good morning Joe: I am just getting started with my equipment and do not have any = experience. I am afraid that I can not be of much help. I am using parts that I purchased from Larry Cockrine and hope to get my = station up and running in the next 6 months. Peter ----- Original Message -----=20 From: Armstrong=20 To: psn-l@................. Sent: Saturday, October 07, 2006 10:03 PM Subject: Seismometer for Central Illinois I live in a subdivision in a city in Central Illinois. The geological = survey tells my that in my area, that bedrock is 10-30' feet below. I = have a basement, but also two active kids. I am interested in having a = seismometer that would be capable of detecting New Madrid activity. So far my attempts have involved the construction of a 8" coil using = #34 wire on a 3' - 3" pvc form using a pendulum of 6 magnetron magents. = Coil: Resistance of ~7.1kohm. =20 After I also have 3 - 4.5hz geophones. My questions follow: 1) Can you think of a project that I use the on-hand coil and magnets = or the geophones? Or should I just start over with another project? 2) Basement: Is it a suitable location? I have been told that that = gravel under the basement disperses most of the vibration. Would the = activity of the kids affect the readings? Should the seimometer be = physically secured to the concrete? 3) Can a home brew seismometer be effective in Central Illinois? Thanks for taking the timeGood morning Joe:I am just getting started with my = equipment and do=20 not have any experience. I am afraid that I can not be of much=20 help.I am using parts that I purchased from = Larry=20 Cockrine and hope to get my station up and running in the next 6=20 months.Peter----- Original Message -----From:=20 ArmstrongSent: Saturday, October 07, = 2006 10:03=20 PMSubject: Seismometer for = Central=20 IllinoisI live in a subdivision in a city in = Central=20 Illinois. The geological survey tells my that in my area, that bedrock = is=20 10-30' feet below. I have a basement, but also two active kids. I am=20 interested in having a seismometer that would be capable of detecting = New=20 Madrid activity.So far my attempts have involved the = construction=20 of a 8" coil using #34 wire on a 3' - 3" pvc form using a pendulum of = 6=20 magnetron magents. Coil: Resistance of ~7.1kohm. =After I also have 3 - 4.5hz=20 geophones.My questions follow:1) Can you think of a project that I = use the=20 on-hand coil and magnets or the geophones? Or should I just start over = with=20 another project?2) Basement: Is it a suitable = location? I=20 have been told that that gravel under the basement disperses most = of the vibration. Would the activity of the kids affect the=20 readings? Should the seimometer be physically secured to the=20 concrete?3) Can a home brew seismometer = be effective=20 in Central Illinois?Thanks for taking the = timeJoe