Hi all, it seems this one is sorted out now, though i am not sure what the final decision was....I guess you thought it was was Loran chain drift. For reference this site at Colorado Univ plots the index Dst which is a measure of the disturbance to the geomagnetic field by electrons/ions trapped in the Equatorial Ring Current. You can see the 5th was quiet compared with the 6th, but even then the variations are miniscule +/- 20nT in around 50,000nT a severe storm will give a shift of around -400nT http://lasp.colorado.edu/space_weather/dsttemerin/dsttemerin.html Geomagnetic events usually lag associated flares by 48 to 56 hours.
Cheers de Alan G3NYK ----- Original Message ----- From: tom jones <[EMAIL PROTECTED]> To: <[email protected]> Sent: 09 June 2007 01:53 Subject: [time-nuts] solar flares and cesium drift > > I dont know about the cesium, but I can advise that in my opinion there have > not been any major geomagnetic storms in the past few days. In fact nothing > different to what has been happening for most of the last month. If anything > it is relatively quiet. Solar flares do not produce an magnetic effect, they > are purely radiation. What often happens is the emission of an associated > CME and the currently active area #960 was right on the limb of the visible > disc when the flares occured so any CME missed us. I supose it is possible > that the radiation has affected the accuracy of GPS as received after > passing through the ionosphere, but surely this would have been corrected > very quickly? > > Cheers de Alan G3NYK > > > Hi Alan > > What I was looking at was the xray events this past week from sunspot #960 There has been about 40 medium size xray events and I assumed that geomagnetic events went hand in hand with xray events and thought it was an explanation for my cesium/loran drift. > > > I was wondering what specific dates you had this observation? I'd like to > compare that data, against some of the data I have. > > Raimond Melkers > > Hey Raimond here is my data please sent yours if possible. > > From 17:26pdt on 6-04-07 > To 07:20pdt on 6-05-07 I lost 40 to 50ns and continuing > To 21:38pdt on 6-05-07 I lost another 10ns to 20ns and continuing > To 05:23pdt on 6-06-07 I lost another 100ns to 110ns (strong winds ) continuing > To 06:13pdt on 6-07-07 I lost another 50ns and continuing > To 17:45pdt on 6-08-07 I gained 90ns could today gain be a gps correction? > > Happy Time keeping: > Tom > > > > My orignal posting: > > We've had several solar flares this past week. My cesium standard has lost about 200ns as compared with fallon loran and gps. > I was showing approximately 10 to 30 nanoseconds cesium drift the previous weeks when > solar activity was quiet. > I'm assuming all the drift I'm observing is my cesium standard (5061) and not loran or gps > especially because loran is steered by gps and gps is steered by usno-amc. > > Has anyone else noticed any extra cesium drift this week? > I'm assuming this drift is due to changes in the earth geomagnetic field due to solar activity? > > > > > --------------------------------- > Need a vacation? Get great deals to amazing places on Yahoo! Travel. > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
