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Propagation outlook from Boulder

:Product: Weekly Highlights and Forecasts
:Issued: 2018 Apr 16 0126 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/weekly.html
#
# Weekly Highlights and Forecasts
#
Highlights of Solar and Geomagnetic Activity 09 – 15 April 2018

Solar activity was at very low levels with a few isolated B-class
flares observed.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at
moderate levels on 09 Apr and high levels on 10-15 Apr. The largest
flux of the period was 25,451 pfu observed at 12/2155 UTC.

Geomagnetic field activity was at quiet to active levels from 09-13
Apr due to negative polarity CH HSS effects. An isolated G1 (Minor)
storm period was observed early on 11 Apr. Quiet conditions were
observed on 14-15 Apr.

The period began with solar wind speeds at about 375 km/s, total
field (Bt) at about 3 nT, Bz weakly negative to about -3 nT and the
phi angle in a positive orientation. Early on the 9th, an SSBC from
a positive to a negative orientation occurred coupled with a CIR in
advance of a recurrent, negative polarity CH HSS. Winds speeds
gradually increased in near 580 km/s by 11/0700 UTC, Bt peaked at 9
nT on the 11th and the Bz component was variable between +9 nT to
-7nT early on 10 Apr. The period ended with wind speeds near 300
km/s coupled with a weak magnetic structure.

FORECAST OF SOLAR AND GEOMAGNETIC ACTIVITY 16 APRIL – 12 MAY 2018

Solar activity is expected to be at 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 high levels on 16-30 Apr and 07-12 May due to
recurrent CH HSS effects. Normal to moderate levels are expected
from 01-06 May.

Geomagnetic field activity is expected to be unsettled to active
levels on 19-20 Apr and 06-10 May due to recurrent CH HSS effects.
Mostly quiet levels are expected for the remainder of the outlook
period.

:Product: 27-day Space Weather Outlook Table 27DO.txt
:Issued: 2018 Apr 16 0127 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# 27-day Space Weather Outlook Table
# Issued 2018-04-16
#
# UTC Radio Flux Planetary Largest
# Date 10.7 cm A Index Kp Index
2018 Apr 16 72 5 2
2018 Apr 17 72 5 2
2018 Apr 18 72 5 2
2018 Apr 19 72 12 4
2018 Apr 20 72 10 4
2018 Apr 21 72 5 2
2018 Apr 22 72 5 2
2018 Apr 23 69 5 2
2018 Apr 24 69 5 2
2018 Apr 25 69 5 2
2018 Apr 26 69 5 2
2018 Apr 27 69 5 2
2018 Apr 28 69 5 2
2018 Apr 29 69 5 2
2018 Apr 30 69 5 2
2018 May 01 69 5 2
2018 May 02 69 5 2
2018 May 03 69 5 2
2018 May 04 69 5 2
2018 May 05 69 5 2
2018 May 06 70 10 4
2018 May 07 70 15 4
2018 May 08 70 15 4
2018 May 09 70 10 4
2018 May 10 70 10 4
2018 May 11 70 5 2
2018 May 12 70 5 2
(SWPC via DXLD)

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