Solar Observation Page
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SID Sudden Ionospheric Disturbance is a phenomenon that occurs when x-ray flares from the sun ionize the D layer of the Ionosphere “which is about 60 KM up”. The ionization of this region of the Ionosphere briefly causes signals to bounce off that layer allowing signals to be received from over the horizon that normally could not be received during the day. By monitoring distant stations we can study the affects of solar flaring on the Ionosphere. Below are graphs from my monitoring station that are updated once a day @ 00:00 UTC. For more info about SID monitoring visit Stanford University’s SOLAR Center web site @
Stanford University SOLAR Center
3 Day Data updated every 5 minutes
Current Xray Flux Data from GOES satellite
Current SID Graph NAA 24.0 Khz U.S. Navy communications Station at Cutler, Maine
Current SID Graph NLK 24.8 Khz U.S. Navy communications Station at Jim Creek, Washington
Current SID Graph NAU 40.8 Khz U.S. Navy communications Station at Aguada, Puerto Rico
Current SID Graph NML 25.2 Khz U.S. Navy communications Station at LaMour, North Dakota
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