Archive for the ‘hf’ Category

Weekly Propagation Summary – 2019 Jun 17 16:10 UTC

Weekly Propagation Summary (2019 Jun 17 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 Jun 17 0339 UTC.

Highlights of Solar and Geomagnetic Activity 10 – 16 June 2019

Solar activity was at very low levels. No sunspots were observed on the visible disk and there was an absence of significant flare activity. No Earth-directed CMEs were observed in available imagery.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels throughout the reporting period.

Geomagnetic field activity reached active levels on 13 June, and unsettled levels on 14 June due to recurrent CH HSS influence. Quiet conditions were observed during the remainder of the period.

Forecast of Solar and Geomagnetic Activity 17 June – 13 July 2019

Solar activity is expected to be at very low levels throughout the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 26-30 June, with moderate levels expected on 18-25 June and 01-03 July in response to elevated wind speeds associated with recurrent CH HSS activity.

Geomagnetic field activity is expected to reach active levels on 17-19, 25 June, unsettled levels on 20-22, 24, 26 June and 06, 10-11, 13 July due to CH HSS influence. Quiet conditions are expected throughout the remainder of the outlook period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..

Weekly Propagation Summary – 2019 Jun 10 16:10 UTC

Weekly Propagation Summary (2019 Jun 10 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 Jun 10 0314 UTC.

Highlights of Solar and Geomagnetic Activity 03 – 09 June 2019

Solar activity was at very low levels. No sunspots were observed on the visible disk and there was an absence of significant flare activity. A dissapearing solar filament (DSF), centered near S05E52, was observed in GONG optical imagery at 03/0715 UTC but was not observed in LASCO imagery. This CME was believed to have impacted Earth midday on 08 June. An additional DSF, centered near S05E13, was observed at 07/2145 UTC and is expected to have a possible geoeffective component with an anticipated arrival of 12 June.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 03 June and moderate levels on 04-08 June in response to elevated wind speeds from a negative polarity, coronal hole high-speed stream (CH HSS). The peak electron flux during the reporting period was 2,270 pfu at 03/1755 UTC.

Geomagnetic field activity reached G1 (Minor) storm levels on 08 June and unsettled levels on 09 June as a result of the aforementioned 03 June CME. Quiet conditons were observed throughout the remainder of the period.

Forecast of Solar and Geomagnetic Activity 10 June – 06 July 2019

Solar activity is expected to be at very low levels throughout the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to reach high levels on 11-13 and 26-30 June, with moderate levels expected on 10, 14-20, 25 June and 01-03 July in response to elevated wind speeds associated with recurrent CH HSS activity.

Geomagnetic field activity is expected to reach active levels on 12 and 25 June, unsettled levels on 10-11, 13, 24, 26 June and 06 July due to CH HSS influence. Quiet conditions are expected throughout the remainder of the outlook period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..

Weekly Propagation Summary – 2019 Jun 03 16:10 UTC

Weekly Propagation Summary (2019 Jun 03 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 Jun 03 0154 UTC.

Highlights of Solar and Geomagnetic Activity 27 May – 02 June 2019

Solar activity was at very low levels. No sunspots were observed on the visible disk. The strongest flare of the period reached B2 at 01/1454 UTC and was from around the E. limb. No Earth-directed CMEs were observed in available coronagraph imagery.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels on 27-28 May, moderate levels on 29 May and moderate to high levels on 31 May – 02 Jun. The increase in electron flux was due to increased solar wind speeds from a negative polarity CH HSS.

Geomagnetic field activity ranged from quiet to active levels. A weak, slow-moving transient was observed on 27 May, resulting in quiet to unsettled conditions. Total magnetic field strength reached a peak of 12 nT and no significant periods of southward Bz were observed. Solar wind speeds for the transient were between 320-380 km/s. Late on 28 May, an increase in solar winds to between 500-550 km/s was observed, producing unsettled conditions through 29 May, with an isolated period of active during the 29/0300-0600 synoptic period. The geomagnetic field returned to quiet levels after 30/0300 UTC as effects from the negative polarity CH HSS slowly waned. Quiet conditions were observed for the remainder of the reporting period.

Forecast of Solar and Geomagnetic Activity 03 June – 29 June 2019

Solar activity is expected to be at very low levels throughout the reporting period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to range from normal to high levels. High levels are expected on 03-06 Jun, 09-10 Jun and 26-29 Jun; moderate levels are expected on 07-08 Jun, 11-22 Jun and on 25 Jun. Normal levels are expected for the remainder of the outlook period. All increases in electron flux are anticipated due to multiple, recurrent CH HSSs.

Geomagnetic field activity is expected to remain below G1 (Minor) geomagnetic storm levels. Active conditions are likely on 25 Jun; unsettled conditions are likely on 03-05 Jun, 08-09 Jun, 23-24 Jun and 26 Jun. Elevated levels of geomagnetic activity are anticipated due to multiple, recurrent CH HSSs. Quiet conditions are expected for the remainder of the outlook period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..

Weekly Propagation Summary – 2019 May 27 16:10 UTC

Weekly Propagation Summary (2019 May 27 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 May 27 0149 UTC.

Highlights of Solar and Geomagnetic Activity 20 – 26 May 2019

Solar activity was very low. No sunspots were observed on the solar disk and no Earth-directed CMEs were observed in available coronagraph imagery.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels on 20-21 May and normal to moderate levels on 22-26 May.

Geomagnetic field activity was at quiet to unsettled on 20 May and 26 May. The remainder of the reporting period was quiet.

Forecast of Solar and Geomagnetic Activity 27 May – 22 June 2019

Solar activity is expected to be very low throughout the outlook period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to range from normal to high levels. High levels are expected on 29 May – 02 Jun and moderate levels are expected on 03-12 Jun. Enhancements in electron flux are due to the anticipated influence of multiple CH HSSs. The remainder of the outlook period is expected to be at normal background levels.

Geomagnetic field activity is expected to range from quiet to active levels. Early on 27 May, unsettled to active levels are possible due to weak enhancements in the solar wind. Negative polarity CH HSS influence is expected to produce unsettled to active conditions from 28-30 May and quiet to unsettled conditions from 31 May-02 Jun. The remainder of the outlook period is expected to be mostly quiet under nominal solar wind conditions.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..

Weekly Propagation Summary – 2019 May 20 16:10 UTC

Weekly Propagation Summary (2019 May 20 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 May 20 0537 UTC.

Highlights of Solar and Geomagnetic Activity 13 – 19 May 2019

Solar activity was at very low to low levels, with low-level activity observed on 15 May due to a C2.0/SN flare from Region 2741 (N05 L=272, class/area Hsx/160 on 15 May). Very low-level activity was observed for the remainder of the period. Two eruptions were observed in coronagraph imagery, but were directed east and determined to not be geoeffective.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at high levels on 13, 15, and 16 May. Normal to moderate levels were observed for the remaining days in the period.

Geomagnetic field activity reached G3 (Major) storm levels on 14 May due to effects from a CME that erupted on 11 May. G3 storm conditions were observed during the 14/0600-0900 UTC synoptic period, with G2 stom conditions occurring in the 14/0300-0600 UTC period. Active conditions occurred in the 14/0900-1200 and 14/1800-2100 UTC periods. Solar wind parameters at the DSCOVR spacecraft were enhanced with Bt reaching as high as 15 nT accompanied by prolonged periods of southward Bz. Solar wind speed reached a maximum of 568 km/s. Unsettled conditions were observed on 16-17 May. Quiet conditions were observed for the remainder of the summary period.

Forecast of Solar and Geomagnetic Activity 20 May – 15 June 2019

Solar activity is expected to be very low levels throughout the period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at high levels on 21-24 May and 29 May – 02 June due to coronal hole high speed stream effects. Normal to moderate levels are expected for the remainder of the period.

Geomagnetic field activity is expected to be at active levels on 29 May due to recurrent coronal hole activity. Quiet to unsettled levels are expected for the remainder of the period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..

Weekly Propagation Summary – 2019 May 13 16:10 UTC

Weekly Propagation Summary (2019 May 13 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 May 13 0226 UTC.

Highlights of Solar and Geomagnetic Activity 06 – 12 May 2019

Solar activity was at low levels on 06, 07, and 09 May due to C-class flare activity from Region 2740 (N08, L=307 class/area Dho/280 on 05 May. The largest of the flares was a C9.9/1N at 06/0510 UTC. Mutliple eruptions were observed in coronagraph imagery, but only the halo CME from 06 May was geoeffective. The assymetric halo CME was first observed in SOHO LASCO C2 imagery at 06/2348 UTC. Additionally, a partial halo CME was first observed in LASCO C2 imagery at 12/2036 UTC and is determined to be Earth-directed and arrive at Earth on 17 May. Solar activity was at very low levels for the remainder of the summary period.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit reached high levels on 07, 11, and 12 May. Normal to moderate levels were observed throughout the remainder of the period.

Geomagnetic field activity reached active to G1 (Minor) storm levels on 11 May due to the arrival of a CME from 06 May. Impact was first observed by the DSCOVR spacecraft at 10/1655 UTC. Total reached a peak of 12 nT and Bz reached a maximum southward deflection of -11 nT. Solar wind averaged near 350 km/s throughout tranient passage. G1 (Minor) storm levels were observed during the 11/00-03 UTC synoptic period, with several active periods during the remainder of the UT day. Quiet to unsettled levels were observed for the remainder of the period.

Forecast of Solar and Geomagnetic Activity 13 May – 08 June 2019

Solar activity is expected to be at very low levels, with a slight chance of C-class flares throughout the period.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at moderate to high levels on 13-23 May, and 29 May – 08 June. Normal to moderate levels are expected on 24-28 May.

Geomagnetic field activity is expected to reach G1 (Minor) storm levels on 15 and 17 May due to CME arrival. Active conditions are expected on 29 May due to the influence of a recurrent coronal hole high speed stream. Quiet to unsettled conditions are expected for the remainder of the period.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..

Weekly Propagation Summary – 2019 May 06 16:10 UTC

Weekly Propagation Summary (2019 May 06 16:10 UTC)

Here is this week’s space weather and geophysical report, issued 2019 May 06 0135 UTC.

Highlights of Solar and Geomagnetic Activity 29 April – 05 May 2019

Solar activity was at very low to low levels. New Region 2740 (N08, L=307, class/area Dho/280 on 05 May) produced a pair of C-class flares, the largest a C2/Sf observed at 04/2243 UTC. No Earth-directed CMEs were observed in available coronograph imagery.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels on 29 Apr – 01 May and reached high levels on 02-05 May. The maximum electron flux was 6,160 pfu observed at 03/1930 UTC.

Geomagnetic field activity ranged from quiet to active levels through the period. Quiet levels were observed on 29-30 Apr under a nominal solar wind regime. Late on 01 May through midday on 02 May, unsettled to active levels were observed under an enhanced solar wind environment due to influence from a negative polarity CH HSS. During this time frame, wind speeds peaked at near 565 km/s, total field reached 11 nT, while the Bz component reached a maximum southward extent of -10 nT. On 03-04 May, field conditions were at quiet to unsettled levels as negative polarity CH HSS influence continued. By 05 May, quiet conditions were observed under waning CH HSS influence.

Forecast of Solar and Geomagnetic Activity 06 May – 01 June 2019

Solar activity is expected to be at very low levels, with low levels likely through 20 May due to activity from Region 2740 and the return of old Region 2739 (N06, L=266). Very low conditions are anticipated after 20 May.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is expected to be at moderate to high levels on 06-12 May, and again on 29 May – 01 Jun, due to CH HSS influence. Normal to moderate levels are expected on 13-28 May.

Geomagnetic field activity is expected to range from quiet to active levels. Unsettled to active conditions are expected on 06-07 May and again on 28-31 May. Both enhancements in geomagnetic activity are due to recurrent, negativity polarity CH HSSs. The remainder of the outlook period is expected to be at quiet levels.

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com/

Live Aurora mapping is at http://aurora.sunspotwatch.com/

If you are on Twitter, please follow these two users: 1. https://Twitter.com/NW7US 2. https://Twitter.com/hfradiospacewx

– – – – – – – – – – – – –

Be sure to subscribe to our space weather and propagation email group, on Groups.io

https://groups.io/g/propagation-and-space-weather

Spread the word!

– – – – – – – – – – – – –

Links of interest:

+ Amazon space weather books: http://g.nw7us.us/fbssw-aSWSC
+ https://Twitter.com/NW7US
+ https://Twitter.com/hfradiospacewx

Space Weather and Ham Radio YouTube Channel News:

I am working on launching a YouTube channel overhaul, that includes series of videos about space weather, radio signal propagation, and more.

Additionally, I am working on improving the educational efforts via the email, Facebook, YouTube, Tumblr, and other activities.

You can help!

Please consider becoming a Patron of these space weather and radio communications services, beginning with the YouTube channel:

https://www.patreon.com/NW7US

The YouTube channel:
https://YouTube.com/NW7US

..


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