IS428 AY2019-20T1 Assign Sean Chai Shong Hee Interesting Anomalies & Observations
Contents
Interesting Anomalies and Observations
Question 1
Visualize radiation measurements over time from both static and mobile sensors to identify areas where radiation over background (radiation) is detected. Characterize changes over time.
Visualising measurements from Static Sensors
Trends in measurements were easier seen when disaggregating the data. Radiation values for static sensors were plotted over time to show how measures varied over the span of 4 days from 6 April till 10 April.
The shapes indicate the radiation values taken at its respective neighbourhood. Highlighted in red are values that are higher than the average background cpm level, as determined by the Radiation Network to be 60 cpm.
We can see that there were very few discrepancies in recorded values for 6th and 7th April, with a large bulk of values falling below the base radiation background level of 60 cpm.
The next 3 days saw a big increase in recorded values above 60 cpm. Safe Town, where the radiation plant is located at saw the biggest increase in number of recorded values above 60 cpm on the 8th of April, indicating radiation leakage due to an earthquake.
Old Town, which is situated adjacent to Safe Town, recorded big increases in the number of values above 60 cpm as well, indicating contamination by radiation leakage.
