NOAA / Space Weather Prediction Center
Space Weather Alerts |
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Alert Message Keyword: Value Pairs
with Format, Description, and ExampleSpace weather alert messages are made up of Keyword: Value pairs as defined in the table below. The table is ordered as the keywords appear in alert messages, i.e. Space Weather Message Code: is always the first keyword and the other keywords follow in the order shown in the table, ending with a Comment: if its present. However, only keywords with values are included in the messages. See Sample Messages.
The Used In column shows which messages may use each keyword. Alert Codes and Names are shown in the Alerts Table. Some keywords are optional meaning the information is included if available, but may not be present.
NOTE: All keywords have NOT been implemented. The Sample Messages page shows which keywords are currently implemented.
Keyword: |
Value |
Used in |
Format, Description, Example |
---|---|---|---|
Space Weather Message Code: | Code |
All messages |
Six character code. First 3 char ALT, WAR, WAT, or SUM.
Each "code" has a corresponding "message name". |
Serial Number: | integer |
All messages |
Integer; range 1 through 9999. Each code is numbered independently.
New alerts with not predecessor will start at 1. New alerts that replace
old alerts with continue existing serial numbers.. Extensions, continuations
and cancellations are numbered in sequence with the code. |
Issue Time: |
Date/time UTC |
All messages |
Standard time format: |
WATCH: WARNING: EXTENDED WARNING: ALERT: CONTINUED ALERT: SUMMARY: |
Message Name |
All messages |
Type of message, including if its an extention or continuation, and the message name. Each "message name" has a corresponding "code". ALERT: X-ray Flux exceeded M5 CONTINUED WARNING: Geomagnetic K-index of 4 |
CANCEL WATCH: CANCEL WARNING: CANCEL ALERT: CANCEL SUMMARY: |
Message Name |
Cancellations |
Type of message being cancelled, and the message name. CANCEL SUMMARY: 10cm Radio Burst |
Extension to Serial Number: | integer |
Extended warnings WARK0x, WARPX1, WARPC0 |
Serial number of the message being extended. |
Continuation of Serial Number: | integer |
Continued alerts ALTPXx, ALTPC0 |
Serial number of the message being continued. |
Cancel Serial Number: | integer |
Cancellations |
Serial number of the message being canceled. |
Original Issue Time: |
Date/time UTC |
Cancellations |
Standard time format |
Threshold Reached: |
Date/time UTC |
ALTXMF, ALTK0x, ALTEF3 |
Standard time format For X-rays, time x-ray flux reached M5 |
Begin Time: |
Date/time UTC |
SUMXxx, ALTTP2, ALTTP4, ALT10R, ALTPXx, SUMPXx, ALTPC0, SUMPC0 |
Standard time format |
Maximum Time: |
Date/time UTC |
SUMXxx, SUM10R, continued ALTPXx, SUMPXx, continued ALTPC0, SUMPC0 |
Standard time format |
End Time: | Date/time UTC |
SUMXxx, SUM10R, SUMPXx SUMPC0 (Optional on ALTTP2, ALTTP4) |
Standard time format |
Valid From: | Date/time UTC |
Warnings and extensions WARSUD, WARK0x, WARPX1, WARPC0 |
Standard time format |
Valid To: | Date/time UTC |
WARSUD, WARK0x, WARPX1, WARPC0 |
Standard time format. |
Now Valid Until: | Date/time UTC |
Extended WARK0x, WARPX1, WARPC0 |
Standard time format On extended geomagnetic warnings this must be a whole hour at the end of a 3-hour synoptic period, e.g. 0300, 0600, ... 2400 UTC. |
Observed: |
Date/time UTC |
SUMSUD |
Standard time format |
IP Shock Passage Observed: | Date/time UTC |
Optional on WARSUD |
Standard time format. Interplanetary Shock Passage Observed. From ACE, Triana, SOHO, etc. |
Valid for UTC Day: |
Date UTC |
WATAxx, ALTSTR |
UTC Year, Month, Day 2002 Jan 1 |
Synoptic Period: | 2100-2400 UTC |
ALTK0x |
3-hour synoptic period for the K-index. There are 8 3-hour synoptic period in a day: 0000-0300, 0300-0600, 0600-0900, 090-1200, 1200-1500, 1500-1800, 1800-2100, 2100-2400 UTC. Note end of day is denoted as 2400 instead of 0000 on the next UTC day. |
Current X-ray Flux: | M6.2 |
ALTXMF |
C, M, or X (upper case), 1 significant digit, X17.0 not X17,
no spaces. See X-ray flare class |
X-ray Class: | M6.2 |
SUMXxx |
C, M, or X (upper case), 1 significant digit, X17.0 not X17,
no spaces. See X-ray flare class |
Optical Class: |
1b |
Optional on ALTXMF, SUMXxx |
2 characters, Importance is S (upper case), 1, 2, 3, or 4. Brightness is lower case; f, n, b. |
Location: |
N32W45 |
Optional on ALTXMF, SUMXxx |
N/S and E/W. 2 digit distance 00 to 90. S25E90 for Limb. No spaces. |
Region Number: | 9936 |
Optional on ALTXMF, SUMXxx |
4-digit integer, 0000 through 9999, with leading zeros. Only last 4-digits are used the sequence. Actual numbers are over 10,000. |
Duration: |
33 minutes |
SUM10R (Optional on ALTTP2, ALTTP4) |
Integer, always minutes. For events with the same begin and end times, the duration is 1 minute. |
Estimated Velocity: | 1003 km/s |
ALTTP2 |
Integer and units. No comma in values, i.e. 1000 not 1,000. Reported by ground radio observatories. |
Frequency Range: | 30-80 MHz |
Optional on ALTTP2, ALTTP4 |
Integer range nnn-nnn MHz, no leading zeros |
Importance: | 2 |
Optional on ALTTP2, ALTTP4 |
Integer: 1, 2, or 3 |
Peak Flux: | 4700 sfu |
SUM10R |
Integer and units. No comma in values, i.e. 1000 not 1,000. 1 solar flux unit (sfu) = 10-22 Wm-2 Hz-1 |
Latest Penticton Noon Flux: | 274 sfu |
SUM10R |
Integer and units. Last Penticton noon flux, may not be today
or yesterday -- just last know value. 1 solar flux unit (sfu) = 10-22 Wm-2 Hz-1 |
Deviation: | 114 nT |
SUMSUD |
Integer and units. No comma in values, i.e. 1000 not 1,000. nT = nanotesla |
Station: | Boulder |
ALTTP2, ALTTP4 SUM10R, SUMSUD, ALTK0x, ALTEF3 |
Radio: SAG, LEA, PAL, SVI, HOL, CUL Geomagnetic: Boulder Electron: GOES12, GOES11 |
Warning Condition: |
Onset |
WARK0x, WARPX1, WARPC0 |
Onset or Persistence |
Active Warning: | Yes |
ALTK0x |
Yes or No |
Observed Yesterday: | Yes |
ALTEF3 |
Yes or No |
Yesterday Maximum 2MeV Flux: | 1435 pfu |
Optional on ALTEF3 |
Integer and units. No comma in values, i.e. 1000 not 1,000. 1 pfu = particles·s-1·ster-1·cm-2 |
Maximum 10MeV Flux: |
35 pfu |
Continued ALTPXx, SUMPXx |
Integer and units No comma in values, i.e. 1000 not 1,000. 1.0 pfu = particles·s-1·ster-1·cm-2 |
Maximum 100MeV Flux: | 3.5 pfu |
Continued ALTPC0, SUMPC0 |
Real with one decimal place and units 1.0 pfu = particles·s-1·ster-1·cm-2 |
Current 10MeV Flux: | 15 pfu |
Extended WARPX1, ALTPXx |
Integer and units. No comma in values, i.e. 1000 not 1,000. 1 pfu = particles·s-1·ster-1·cm-2 |
Current 100MeV Flux: | 1.5 pfu |
Extended WARPC0, ALTPC0 |
Real with one decimal place and units. 1 pfu = particles·s-1·ster-1·cm-2 |
Note: There are 3 NOAA Scales: R, G, and S. Each scale has
5 levels which are numbered and named: 1 - Minor, 2 - Moderate, 3 - Strong, 4 - Severe, and 5 -Extreme. See NOAA Scales description. |
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NOAA Scale: | R2 - Moderate |
X-ray alerts and summaries ALTXMF, SUMXxx |
M5 = R2, X1 = R3, |
NOAA Scale: | G3 or greater - Strong to Extreme |
Geomagnetic warnings or extensions WARK0x |
K 5 = G1, K 6 = G2, K 7 >= G3 or greater" |
NOAA Scale: | G4 - Severe |
Geomagnetic alerts ALTK0x |
K 5 = G1, K 6 = G2,
K 7 = G3, |
NOAA Scale: | S3 - Strong |
Proton alerts, and summaries ALTPXx, SUMPXx |
Maximum flux reach up to time of alert. |
Predicted NOAA Scale: | S3 - Strong |
Proton warning WARPX1 |
Maximum predicted flux. |
Comment: | Text message |
Cancellation (Optional on all other messages) |
Text string, can be multiple lines. |
Updated: October 1, 2007
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