HFRadio.org e-Alert Service - Receive automated e-mail alerts of live propagation and space weather information.

Do you wish to be e-mailed when the Solar and Geomagnetic conditions (Flux, Ap, Kp, Solar Wind, Sunspot Number, and so on) change? This is the HFRadio.org eAlert Service. This service provides an automated e-mail message (an e-Alert) that is sent to your e-mail address. Your email address could be your pager, cellphone, or PDA, for instance. Whenever certain conditions change (Ap, Kp, Flux), you will be notified of these conditions. This allows you to stay informed about current conditions.

NEWS: MAY 20, 2007 - I have assigned everyone currently subscribed with a NEW password. You should have received your new password by e-mail. When I place the new interface on-line, you may change your password, here. And, you may also subscribe, or unsubscribe, here.

The sign-up and sign-off feature is temporarily down, as I re-program the database. This should be up, later this week. It is taking me some time to get everything working. But, it should be ready soon. (June 7, 2007)

The number of e-Alerts in a given day, in the worst case (the worst case is a day when the Flux changes every three hours, the Kp index rises above 4, and other events) you might receive up to 12. On most days, even during active times, you might only see three to five eAlerts. These might come at any time during a 24 hour period.

What is in an e-Alert? What do all the numbers and abbreviations mean? Click here to read the e-Alert explanation.

If you are using a HeadLine Reader (see this list of software), you may add a channel to the e-Alert information by creating a channel using this URL: http://hfradio.org/propsupport/prop.rss

This is a sample eAlert (see above for subscribing):

SFI:208 A:11 frm 12 K:2 frm 3 (10 nT) 0000 25 Jul
Frcst: SWX next 24h:minor: G1 S1 R1
Obs: SWX last 24h:minor: S1 R1

SSN: 226 (23 Jul 2002)
Au: 5
S Wind: 420.9 km/s @ 2.2 protons/cm3

Warning (162): Proton 10MeV Integral Flux above 10pfu expected
From: 2002 Jul 22 1445 UTC To: 2002 Jul 25 1500 UTC
Condition: Persistence. Extends Warning #161.

Global HF Propagation Conditions
for 2300Z on 24 Jul, 2002
Low Latitude: Normal
Mid Latitude: Normal
Hi Latitude: Poor(PCA)

= end =

In your eAlerts, you see the following abbreviations:

SFI = The 10.7cm Solar Flux Index.

A = The Ap Index (Planetary) from the Ak Index, a daily index of geomagnetic activity for a specific station or network of stations (represented generically here by k) derived as the average of the eight 3-hourly ak indexes in a Universal Time day.

K = The Kp index. A 3-hourly planetary index of geomagnetic activity calculated by the Institut fur Geophysik der Gottingen Universitat, F.R. Germany, from the K indexes observed at 13 stations primarily in the Northern Hemisphere. The Kp indexes, which date from 1932, are used to determine the ap indexes.

nT = NanoTeslas.

The line, "SFI:208 A:11 frm 12 K:2 frm 3 (10 nT) 0000 25 Jul" is to be read as:
10.7cm Solar Flux Index is 208.
Planetary A Index is 11, down from 12
Planetary K Index is 2, down from 3
The nT reading is 10.
These readings are as of 0000 GMT, on the 25th of Jul (UTC).

Next, you see the forecast (Frcst).

SWX = Solar Weather. The forecast is for the next 24 hours, from the time/date of the SFI line. First, you get the overall rating of the expected solar weather conditions. In this example, it is expected to be "minor" in activity.

Then, you get specific conditions expected.

G1 S1 R1 are levels, as defined by The NOAA Space Weather Scales tables. See http://www.sec.noaa.gov/NOAAscales/

The G scale refers to Geomagnetic Activity. The scale is:

G5 = Extreme - Kp = 9
G4 = Severe - Kp = 8
G3 = Strong - Kp = 7
G2 = Moderate - Kp = 6
G1 = Minor - Kp = 5

The S scale refers to Solar Activity. This scale is:

S5 = Extreme - Flux level of > 10 Mev = 10^5
S4 = Severe - Flux level of > 10 Mev = 10^4
S3 = Strong - Flux level of > 10 Mev = 10^3
S2 = Moderate - Flux level of > 10 Mev = 10^2
S1 = Minor - Flux level of > 10 Mev = 10

The R scale refers to Radio Blackouts. The scale is:

(NOTE: the ^-5 is -5 superscripted, and so on)

R5 = Extreme - X20 Class Flare, Flux = 2x10^-3
R4 = Severe - X10 Class Flare, Flux = 10^-3
R3 = Strong - X1 Class Flare, Flux = 10^-4
R2 = Moderate - M5 Class Flare, Flux = 5x10^-5
R1 = Minor - M1 Class Flare, Flux = 10^-5

Next, you will see the Observed Space Weather (SWX). The format is the same as for that of the Forecast.

Next, you get the SSN - Sunspot Number, and the date of the reading. The Aurora Index follows, then the Solar Wind reading.

Any further Warnings or Alerts are then listed.

Finally, the general HF conditions are shown for three latitude regions.