NW7US Propagation Bulletin Update 20 January 2005 - 1645 UTC This latest X-class flare, the THIRD LARGEST of this solar cycle (Cycle 23), was incredible. It unleashed an extreme (and very sudden) pro
NW7US Propagation Bulletin Update 21 January 2005 - 1945 UTC As I mentioned early on (see my recent bulletins), the X7 flare unleashed a coronal mass ejection. I had reported that it was probable tha
NW7US Propagation Bulletin 07 February 2005 Propagation today (07-II-2005) has turned poor on many HF circuits, due to a fast solar wind originating in a large coronal hole. This coronal hole is loca
Hello, at the time of writing this NW7US Propagation Bulletin, we are recovering from an X3-class X-ray Flare. This is the fifth X-class flare in the last day and a half. This flare measured X3.6, th
Hello, Over the last week or so, we've been seeing very nice solar activity. Solar activity has been strong, with the 10.7-cm Flux reading a high of 175. Last night between 6 PM and midnight, from my
NW7US Propagation Bulletin - 25-VII-2004 / 1500Z We are in the middle of a very strong geomagnetic storm. The estimated planetary K index (Kp) reached a level of 8, with the Bolder, Colorado K readin
Hello, Since the last NW7US Propagation Bulletin, we have witnessed quite a strong geomagnetic storm, with the resulting Auroral propagation even on 222 MHz. We usually see storms of this magnitude d
Hello, At the time of preparing this NW7US Propagation Bulletin, 1345 27 July 2004 UTC, we are still under a major geomagnetic storm. The Planetary K index is reading 8, as is the Bolder, Colorado K
The CQ WW SSB contest is coming up. For those who use the CQ Magazine Propagation Column "Last Minute Forecast" to help plan your operation, you might be interested in the "live" version of that tabl
Hello. Some of you might be interested in using your fine contesting station to augment our propagation studies on 10 meters and on VHF. When you are not using your station, why not let it be a part
Howdy, DX hounds. The Sun has clearly quieted down considerably since the beginning of 2004. The end of Solar Cycle 23 is expected between 2006 and 2007, so we are far into the decline of the current
During the last weekend of this month (the CQ WW SSB contest weekend, 30 and 31 October 2004), we should experience good conditions. While we won't see very high sunspot counts, we do have enough act
Hello, This is the last update before the start of the CQ WW SSB contest of 2004. With the contest starting at the start of 30 October 2004 UTC, and running through the end of 31 October 2004 UTC, we
Say 'hello' to Murphy. Who would have thought that the Sun would wake up in a cranky mood, just as the contest gets under way? Based on the 27-day rotation cycle, we did not expect the see a rise in
I'll gently remind them that we use QSL or Roger instead of 10-4. Wouldn't a purist say that Q-codes should only be used in CW mode, and not on voice modes? I've heard it argued that Q-codes were sho
The contest starts on 27-XII-2004 UTC, during a period of unsettled geomagnetic activity. Several official forecasting centers (i.e., SEC NOAA, US Air Force, and SIDC) predict a continued downward tr
Hi, folks. When planning DXing, it is useful to have information regarding current ionospheric conditions, and so forth. I have been supplying a collection of live resources (solar flux and ssn, Ap,
I don't think that this news story fully explores the current event. The latest warning/alert forecast for this is as follows: (From NOAA): Forecast for next 24 hours: Space weather for the next 24
Howdy, fellow HFer. I just finished a long conversation with NOAA's Bill Murtagh, the solar forecaster on duty. We discussed several things, including the press' obsession with the current solar cond
Currently, it is about 0750Z, 25 Oct 2003 UTC. I have been taking snapshots every few hours, starting at about 0400 UTC. Kp is currently 3 at most reporting stations. Aurora index is 5 to 6 at most.