Independant Radiation Readings from Private People with Geigers

NOTE: A lot of evidence points to Government run monitoring systems in Japan, USA, Canada, and Europe being manipulated to protect the Nuclear industry. High detections are explained away by equipment malfunctions, or they just turn the monitoring equipment off during an event.



In Japan they have been caught placing lead backup batteries near the sensors to shield them, placing the monitoring equipment high off the ground, only decontaminating an area around monitoring stations, plus altering the monitoring equipment so it shows much lower readings.









Typical background radiation levels for most of the USA are in the 5 to 28 uR/hr range. Readings can be higher for brief periods of time due to normal variations in radiation levels. They can also be consistently higher for areas at high elevations such as Colorado, or with larger natural deposits of uranium, thorium, radon, etc.

The readings on this page were obtained using one of the Black Cat Systems radiation detectors:

GM-10 Alpha / Beta / Gamma detector
GM-45 Alpha / Beta / Gamma detector with large pancake tube for higher sensitivity
GM-50 Gamma detector
GM-90 Alpha / Beta / Gamma detector with two large pancake tubes for even higher sensitivity
Please visit our Geiger Counter Product Page to get full details about our line of nuclear radiation detector products.
The detector is connected to an ordinary computer (Windows or Macintosh) running a copy of the Rad software and connected to the internet (dialup, cable modem, dsl, etc). Rad automatically sends the current radiation reading to the web server that hosts this site, which generates the map showing the readings for all radiation monitoring stations. Rad is included free with any of our radiation detectors.

A geiger counter lets you check the environment and items for radioactivity. You can use to check for the presence of radon on your house or basement, or even use it to go prospecting for uranium or other radioactive minerals. The GM-10 and other members of the geiger counter family can detect radioisotopes such as Polonium 210 which was used to poison Alexander Litvinenko.

A geiger counter works by detecting the ionization produced by a radioactive particle. Each time a particle of radiation is detected, the counter records this event. The number of events recorded over a period of time indicates the amount of radiation present. Often this is done over one minute intervals, resulting in the familiar "counts per minute" or CPM. The higher the CPM, the higher the radiation levels. You can read a more in depth description of how geiger counters work.


Variations in Geiger Counter Readings
Radiation decay is a random event. That means that if the average reading is say 16 CPM, it will not remain a steady 16, but will bounce up and down. This is normal. The standard deviation is the square root of the average value, and the typical maximum range is plus or minus 3 standard deviations.
So, using the above example, the square root of 16 is 4, so the standard deviation is 4. 3 times 4 is 12. So we would expect the readings to be 16 +/- 12, or range from 4 to 28. That is to say, even if the radiation levels are a "constant" 16, the apparent readings of the geiger counter will range between 4 and 28. So if you suddenly see the reading jump from 16 to 25, that does necessarily not mean that the radiation level has increased.

There is a writeup about Counting Statistics available.

Radioactivity is the emission of energy from the nucleus of certain nuclides or elements. Some naturally occuring radioactive elements include uranium and thorium and radon. A small amount of naturally occuring potassium is even radioactive.

There are three types of radioactive emissions:

Alpha - the least penetrating form of radiation, can be stopped with a piece of paper or a few inches of air. Alpha rays are the nucleus of a helium atom, and are produced by certain radiactive materials such as thorium and uranium.
Beta rays are more penetrating than alpha rays, and can be stopped by a few millimeters of aluminum or other metals. They are very fast moving electrons.
Gamma rays are the most penetrating form of radiation. Depending on their energy, they can travel through up to several inches of steel, and hundreds of feet of air. They are usually produced in conjunction with either alpha or beta rays.
You may be interested in Information on Radiation Units and Background Radiation Levels for more details about the various units of measurement for radiation, and some of the sources for naturally occuring radiation.

We also have an interesting page about Radioactive Products and Other Sources Of Radiation. Many apparently harmless products are actually quite radioactive! With one of our a href=" [link to www.blackcatsystems.com] counters you can inspect items that you own for radiation.


Be sure to visit our home page, [link to www.blackcatsystems.com] We have a variety of software programs available for the Macintosh, Windows, iPhone, iPad, and iPod Touch. You'll be sure to find something of interest.

Users of our detectors are welcome to add their site to the map. Contact us at info (at) blackcatsystems (dot) com for details on how.

Several users have graphs of readings on their own websites, using the Rad software that is included with our detectors:

[link to mac-fan.jp]
[link to jma0800.net]
[link to www.lmdsro.com]
[link to www.reeve.com]
[link to park30.wakwak.com]
[link to securitytokyo.com]
[link to fpgacafe.com]
[link to geiger.web.fc2.com]
[link to aprs.ptu.jp]
[link to www.sharing-info.net]
[link to homepage2.nifty.com]
[link to www.geocities.jp]
[link to spacewalker.jp]
[link to minikitchen.biz]
[link to motoazabu3.web.fc2.com]
[link to www006.upp.so-net.ne.jp]
[link to soilandair.web.fc2.com]
[link to www5.ocn.ne.jp]
[link to raddata.web.fc2.com]
[link to www.illuminum-led.com]
[link to ena-eco.jp]
[link to www.sewing.se]
[link to onodekita.com]
[link to ichbin-frei.tumblr.com]
[link to www.casacota.cat]
[link to www.wretch.cc]
[link to www2.smartpocket.jp]
[link to www.globe.to]
[link to tokyocpm.web.fc2.com]
www.radmon.ch
[link to www.blackcatsystems.com]

Last Edited by 7heHe4RT on 03/23/2015 06:08 PM