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Please note that BG means background, CPM is counts per minute, INT is interior and EXT means exterior. Also note that none of our readings at Radiation Station Santa Monica California [RSSMC] are impacted by radon progeny as we discuss in Beta Watch.

April 9, 2016
12:30 pm INT RSSMC SANTA MONICA RAIN: 42.4 CPM^^ OR BACKGROUND
12:15 pm INT RSSMC BG: 42.9 CPM^^

April 8, 2016
3:25 pm INT RSSMC SANTA MONICA RAIN: 43.1 CPM^^ OR BACKGROUND
3:10 pm INT RSSMC BG: 41.6 CPM^^

April 7, 2016
2:20 pm INT RSSMC SANTA MONICA RAIN: 46.6 CPM^^ OR 18% OVER BACKGROUND = BACKGROUND
2:05 pm INT RSSMC BG: 39.5 CPM^^

March 11, 2016
12:35 pm INT RSSMC SANTA MONICA RAIN: 41.4 CPM^^ OR BACKGROUND
2:35 pm INT RSSMC BG: 44.7 CPM^^

March 7, 2016
12:15 pm INT RSSMC CHECKING FOR BETA TESTING DUST AGGREGATE FROM 3 HEPA FILTER IONIZING AIR CLEANERS: 141.8 CPM^^ OR 3.30 TIMES BACKGROUND HIGHER
Noon INT RSSMC BG: 43.0 CPM^^
11:50 am INT RSSMC SANTA MONICA RAIN ACCUMULATION CAPTURED 6 HOURS BEFORE: 42.4 CPM^^ OR BACKGROUND
11:35 am INT RSSMC BG: 42.2 CPM^^

March 6, 2016
12:35 pm INT RSSMC SANTA MONICA RAIN ACCUMULATION CAPTURED 9-12 HOURS BEFORE: 38.7 CPM^^ OR BACKGROUND
12:15 pm INT RSSMC BG: 41.2 CPM^^

March 5, 2016
11:55 pm INT RSSMC SANTA MONICA RAIN: 38.8 CPM^^ OR BACKGROUND
11:40 pm INT RSSMC BG: 38.0 CPM^^

February 17, 2016
4:15 pm INT RSSMC SANTA MONICA RAIN: 43.5 CPM^^ OR BACKGROUND
4:00 pm INT RSSMC BG: 39.0 CPM^^

January 31, 2016
12:00 pm INT RSSMC SANTA MONICA RAIN: 41.4 CPM^^ OR BACKGROUND
11:30 am INT RSSMC BG: 39.6 CPM^^

January 30, 2016
1:30 pm INT RSSMC CHECKING FOR BETA TESTING DUST AGGREGATE FROM 3 HEPA FILTER IONIZING AIR CLEANERS: 83.8 CPM^^ OR 97.2% ABOVE BACKGROUND
1:15 pm INT RSSMC BG: 42.5 CPM^^

January 28, 2016
1:30 pm INT RSSMC BOOT DUST FROM WLA VA: 41.8 CPM OR BACKGROUND
1:15 pm INT RSSMC BG: 40.3 CPM^^

January 19, 2016
6:40 pm INT RSSMC LIGHT RAIN SAMPLE: 43.6 CPM^^ OR 18.5% ABOVE BACKGROUND
6:20 pm INT RSSMC BG: 36.8 CPM^^

Tube of Crest Pro-Health Advanced tested at normal background
Tube of Crest Pro-Health Advanced tested at normal background

January 12, 2016
1:35 pm INT WLA DENTIST OFFICE 24g (0.85 ounces) Crest Pro-Health Advanced which has carrageenan as an ingredient, a substance usually derived from seaweed: 39.6 CPM or background.
1:20 pm INT WLA DENTIST OFFICE BG: 36.8 CPM^^

January 9, 2016
8:05 pm INT RSSMC LIGHT RAIN: 42.4 CPM^^ OR BACKGROUND
7:50 pm INT RSSMC BG: 40.4 CPM^^

January 6, 2016
9:35 am INT RSSMC Second Storm RAIN: 43.6 CPM^^ OR BACKGROUND
9:20 am INT RSSMC BG: 43.3 CPM^^

January 5, 2016
9:00 am INT RSSMC First Storm RAIN: 44.3 CPM^^ OR BACKGROUND
8:45 am INT RSSMC BG: 41.0 CPM^^

January 1, 2016
~6:00 pm EST INT JET ~28,000′ ALT: 713.1 CPM^^

December 28, 2015
11:05 am EST FREEZING RAIN/SLEET: 49.2 CPM^^ or background
10:50 am EST SOUTHWEST MICHIGAN INT ROOM BG: 44.5 CPM^^

Dec 28 2015 SW Michigan freezing rain-sleet
Dec 28 2015 SW Michigan freezing rain-sleet

December 24, 2015
Noon EST SOUTHWEST MICHIGAN INT ROOM BG: 36.2 CPM^^

December 23, 2015
11:00 am PST INT JET ~28,000′ ALT over California/Nevada border: 836.3 CPM or 22.4 times previous LAX BG
8:35 am PST INT LAX TERMINAL: 37.3 CPM^^

December 21, 2015
10:05 pm INT RSSMC RAIN: 55.3 CPM^^ OR BACKGROUND
9:45 pm INT RSSMC BG: 47.1 CPM^^

December 19, 2015
9:00 pm INT RSSMC RAIN AFTER TWO HOURS WAIT TIME TO TEST: 41.3 CPM^^ OR BACKGROUND
8:45 pm INT RSSMC BG: 38.7 CPM^^

December 13, 2015
5:55 pm INT RSSMC RAIN: 46.0 CPM^^ OR BACKGROUND
5:40 pm INT RSSMC BG: 42.5 CPM^^

November 9, 2015
1:40 pm INT RSSMC BG: 39.2 CPM^^
1:30 pm INT RSSMC RAIN AFTER 2.0 HOURS: 41.6 CPM^^ OR BACKGROUND

November 4, 2015
7:10 am INT RSSMC RAIN FROM NOV. 3: 40.2 CPM^^ OR BACKGROUND
6:55 am INT RSSMC BG: 39.0 CPM^^

November 3, 2015
7:10 pm INT RSSMC SAME RAIN SAMPLE AS PREVIOUS: 40.2 CPM^^ meaning the sample has degraded to nothing above background due to release of short-lived radionuclides [identification of which is unknown]
6:55 pm INT RSSMC BG: 39.0 CPM^^
4:00 pm INT RSSMC RAIN: 95.0 CPM^^ or 119% HIGHER THAN BACKGROUND
3:35 pm INT RSSMC BG: 43.4 CPM^^

October 24, 2015
5:45 pm CDST INT JET OVER ILLINOIS/IOWA BORDER @ ~28,000 FT: 543.9 CPM^^
4:40 pm CDST INT CHICAGO O’HARE GATE KJ: 30.9 CPM^^

October 23, 2015
10:50 pm EDST INT SOUTHWEST MICHIGAN ROOM RAIN: 46.7 CPM^^
10:35 pm EDST INT SOUTHWEST MICHIGAN ROOM BG: 45.0 CPM^^

University of Michigan Fall 2015
University of Michigan Fall 2015

October 21, 2015
10:45 pm EDST INT ANN ARBOR MICHIGAN THIRD-STORY ROOM RAIN: 32.8 CPM^^
10:30 pm EDST INT ANN ARBOR MICHIGAN THIRD-STORY ROOM BG: 34.2 CPM^^

October 20, 2015
5:10 pm EDST INT SOUTHWEST MICHIGAN ROOM RAIN: 72.1 CPM^^ or 71.3% ABOVE BACKGROUND
4:45 pm EDST INT SOUTHWEST MICHIGAN ROOM BG: 42.1 CPM^^

October 11, 2015
7:15 pm EDST INT ANN ARBOR MICHIGAN SECOND-STORY ROOM BG: 36.4 CPM^^
10:30 am EDST INT ANN ARBOR MICHIGAN SECOND-STORY ROOM BG: 31.6 CPM^^

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