Muon Flux Data from St. Croix, U.S.V.I. During Ten Days of May 2015

Compared with the Planetary K- index

The coincidence detector was placed in the normal up-down, 180 degrees position and monitored during the indicated time. Both of the graphs refer to the same 10 days of data collection and show regression lines. The graphs show the elapsed time in hours on the horizontal axis and the µR/hr (micro-roentgens/hour) on the vertical axis. The start time was 8:41 AM AST on May 9, 2015 and the end time was 8:41 AM AST on May 19, 2015, the average value for the 10 day period was 1.09 µR/hr. There seems to be some correlation with the Planetary K- index data during the last several days of the time period. The graph of the Planetary K-index is given at the end of this page. It includes the last several days of the time period. It is given in GMT. 12 AM AST on St. Croix is equivalent to 4 AM GMT.

Another K-Index comparison can be found at the first 3 Days of January 2015.

muon graph

10 Day Muon Flux Data Starting at 8:41 AM AST on 050915 at St. Croix, VI. Averages are for 40 six hour intervals.

 

 

muon graph

10 Day Muon Flux Data Starting at 8:41 AM AST on 050915 at St. Croix, VI. Averages are for 10 one day intervals.

 

 

K-Index

The above graph shows the Planetary K- index data for the time period from May 17 to May 20, 2015 that shows an increase in the K Index around the same time as when the regression line goes up on the graphs. The data is from NOAA's National Weather Service (NWS) and is considered public information. More information can be found about the Planetary K-index at the NWS Space Prediction Center at http://www.swpc.noaa.gov/

 

Return to the Variations in Muon Flux Background Intensity Research Index

Go to Monitoring Muons on the Surface of the Earth for information on muon measurements using a coincidence detector.