Titional Bureau or sianuai-u® Library, N.W. Bldg MAY io 1965 CRPL-F 248 PART B Keterencfi DIM liui tu uu- t^kpn from the library. FOR OFFICIAL DISTRIBUTION PART B SOLAR - GEOPHYSICAL DATA ISSUED APRIL 1965 U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS CENTRAL RADIO PROPAGATION LABORATORY BOULDER, COLORADO
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Titional Bureau or sianuai-u®
Library, N.W. Bldg MAY io 1965
CRPL-F 248 PART B
Keterencfi DIM liui tu uu- t^kpn from the library.
FOR OFFICIAL DISTRIBUTION
PART B
SOLAR - GEOPHYSICAL DATA
ISSUED
APRIL 1965
U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS
CENTRAL RADIO PROPAGATION LABORATORY BOULDER, COLORADO
CRPL-F 248
PART B
NATIONAL BUREAU OF STANDARDS CENTRAL RADIO PROPAGATION LABORATORY
BOULDER, COLORADO
Issued
30 April 1965
SOLAR - GEOPHYSICAL DATA
CONTENTS
i Revisions to Descriptive Text
I DAILY SOLAR INDICES
(a) Relative Sunspot Numbers and 2800 Mc/s Solar Flux - February, March 1965 (b) Graph of Sunspot Cycle
II SOLAR CENTERS OF ACTIVITY
(a) Calcium Plage and Sunspot Regions - March 1965 (b) Magnetic Classifications of Sunspots (Mt. Wilson) - March 1965 (c-e) Final Coronal Line Emission Indices - October, November, December 1964 (f-g) Provisional Coronal Line Emission Indices - February, March 1965
III SOLAR FLARES
(a-d) Optical Observations - March 1965 (e) Flare Patrol Observations - March 1965 (f-i) Optical Observations - November 1964 (j) Flare Patrol Observations - November 1964 (k-o) Optical Observations - December 1964 (p) Flare Patrol Observations - December 1964
(q) Ionospheric Effects (SWF-SEA-SCNA-SPA-SES-SFD-Bursts) - February 1965 (r) 26 Mc/s - Riometer Events (Frobisher Bay) - February 1965
IV SOLAR RADIO WAVES
(a) 2800 Mc/s Outstanding Occurrences (ARO-Ottawa; DRAO-Pent icon) - March 1965 (b) 108 Mc/s Outstanding Occurrences (NBS-Boulder) - March 1965 (c) 7.6-41 Mc/s Spectral Observations (HAO-Boulder) - March 1965 (d-i) 9.1 cm Spectroheliograms (Stanford) - March 1965
V COSMIC RAY INDICES
(a) Neutron Monitors (Churchill - Climax - Dallas) - February 1965 (b) Neutron Monitor (Deep River) - February 1965
VI GEOMAGNETIC ACTIVITY INDICES
(a) C, Kp, Ap and Selected Quiet and Disturbed Days - February 1965 (b) Chart of Kp by Solar Rotations - 1964, 1965
VII RADIO PROPAGATION QUALITY INDICES
(a) CRPL Quality Figures and Forecasts - North Atlantic and North Pacific - February 1965
(b) Graphs Comparing Forecasts and Observed Quality - High
Latitude - February 1965 (c-d) Graphs of Useful Frequency Ranges - February 1965
VIII ALERT PERIODS AND SPECIAL WORLD INTERVALS
(a) IQSY Alert Periods - March 1965
The descriptive text was republished in November 1964. Addenda have been given in the introduction to each of the CRPL-F Part B reports, December 1964 through March 1965.
Sunspot Data:
Starting with the Mount Wilson sunspot data for March 1965, the Mount Wilson group number is given for each group. This is the group number of the series which used to be published in the Publicationsof the Astronomical Society of the Pacific. In the data sent out each month only the groups for which they have magnetic observations are reported. Therefore, the group numbers for the groups for which they do not have magnetic observations will not appear on the monthly data sheets.
Flares:
In CRPL-F 244, on text page, "s" flare definition was added to IAU remarks. After consultation with Dr. Michard, a better definition for flare footnote "s" is as follows:
"s" = brightening follows disappearance of filament, occurs in position of former filament.
l
Ia DAILY SOLAR INDICES
March 1965
Zurich Provisional Relative Sunspot
Numbers
RZ
Daily Values Solar Flux at 2800 Me, Ottawa, Canada
2.0 S17 7709 New 200 1.5 b - d i 2/27 24 2.6 S24 7711(3) New 100 1 b - d i 2/28 1
2.7 NO 9 7708 7661 1600 2.5 1-1 2 < 2/26 >5 2.9 N22 7707 7660 2300 3 Z - ? 2 < 2/26 >5 (97) (1) b - d
3.5 N30 7714 New 100 2 b - d 1 3/1 >2
4.5 N29 7710 New (300) (1) l - ? 1 2/27 24 5.7 N28 7712 7664 (400) (2) 1- Z 3 2/28 12 (218) (2) b - d 7.8 N19 7716 New (400) (2.5) b — l 1 £ 3/10 >4 (72) (3) b ~ l 8.9 S34 7719(3) New (200) (1) b - d 1 3/12 1
10.9 Nil 7722 (3) New (200) (3) b - d 1 3/15 1 12.6 S12 7724(3) New (100) (1) b - d 1 3/16 1 12.7 N23 7717 7674 600 1 ? \ d 3 < 3/10 >4
14.4 N16 7726 New (100) (1) b — i 1 3/18 2 14.6 N24 7720 New 200 2 b - d 1 3/13 3
15.8 S12 7723 (3) New 200 1 b — d 1 3/15 1 16.5 N29 7718 (4) New 1300 2.5 l / l 1 3/11 12 16 9 2 b - i 17.7 Sll 7728 (3) New (100) (1.5) b — d 1 3/19 1
18.5 N16 7729(3) New 200 1 b — d 1 3/19 1
18.7 S30 7730(3) New (100) (1.5) b - d 1 3/20 1
19.3 N02 7731(3) New 100 1 b - d 1 3/20 1 19.7 N30 7733 New (100) (1) b — d 1 3/21 2 19.8 S18 7721(3) New (300) (1.5) i - d 1 3/13 1 20.0 SOI 7725 (3) New (100) (1) b - d 1 3/16 1 20.6 S10 7727 New 200 1.5 b A d 1 3/18 4
23.0 NO 5 7736 New (300) (3) b — Z 1 £ 3/27 22 24.4 N04 7734(3) New 100 1.5 b - d 1 3/24 1 26.0 N22 7732 New (400) (3) i — d 1 3/20 3 27.3 N21 7737 New 300 2.5 b - d 1 £ 3/27 24
27.5 S24 7743 (3) New (100) (1.5) b - d 1 3/30 ~1
28.3 N28 7738 New 200 2.5 b - d 1 £ 3/27 24
28.4 S07 7742 (3) New 100 1.5 b - d 1 3/28 ~1 29.9 S42 7744(3) New 100 2 b - d 1 3/30 1 30.1 N12 7735 7708 1300 3 l - Z 3 3/24 13 (121) (1) Z - d 30.1 N23 7739 7707 500 1.5 b - d 3 £ 3/27 >5
30.6 S16 7740 (3) New (200) (1) b — a 1 3/27 ~1
COMMERCE - STANDARDS - BOULDER
(1) Due to very poor weather conditions, no calcium spectro heliograms were secured at the
McMath-Hulbert Observatory on March 3, 4, 5, 6, 7, 8, 9, 14, 17, 23, 25, 26, and 29, 1965.
(2) Region 7704 is a new region, in the same position as the ephemeral plage 7666 of the
previous rotation.
(3) These small and ephemeral plages were seen for only one day.
(4) Region 7718 is new, near the position of 7677 of the previous rotation, but not the same.
MT. WILSON MAGNETIC CLASSIFICATIONS OF SUNSPOTS 11 b
MARCH 1965
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1 no observ. 1500-1700 12 III 2209:15-2209:30 1- 23-41 6 continuum 1813:15-1837 2 18-41 III 2336:45-2337:45 1+ 18-41
(f) 1843-1854 2 26-37 13 III 1549-1551 1+ 19-41 7 III 1610-1610:30 1 31-41 19 continuum 2035-2210 1- 20-41 8 no observ. 1640-1859 III 2254:45-2255 1- 21-41
Ill 1914:30-1915 2 19-41 III 2257:30-2257:45 1- 25-38 III 1915:30-1915:45 1- 19-41 20 III 1909-1909:15 1- 20-41
no observ. 2110-2255 III 1909:30-1909:45 1- 25-33 9 no observ. 2200-2330 III 2108-2108:15 1- 21-41
12 Ill 1714:30-1715 2 20-41 III 2108:30-2108:45 1- 21-34
III 1721-1721:30 2 18-41 22 no observ. 1500-1800 III 1830-1830:30 1 21-41 23 no observ. 1700-2000 III 2049:15-2050:30 1 18-41 29 no observ. 1700-2000 III 2050:45-2051:45 2 13-41 30 no observ. 1819-2400 III 2114-2115 3 12-41 31 no observ. 1625-1916,
2106-2315 f = amorphous structure COMCRCE - 8TAMOAA9S •OULOCJI
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Va COSMIC RAY INDICES
(Neutron Monitors)
FEBRUARY 1965
CHURCHILL CLIMAX DALLAS
FEB DAILY AVERAGE DAILY AVERAGE DAILY AVERAGE
19 Bb COUNTS PER HOUR COUNTS PER HOUR COUNTS PER HOUR
1. The advance Jc-forecasts are scored against the average high latitude whole day indices.
2. The observed indices for the North Pacific are low weight because of insufficient data available for their preparation.
3. The predicted Apr indices are issued each Wednesday for the coming seven days. The value for the first day of each prediction period is underscored.
QU
AL
ITY
QU
AL
ITY
QU
AL
ITY
CRPL RADIO PROPAGATION QUALITY FIGURES AND FORECASTS
NORTH ATLANTIC
FEBRUARY 1965
— Short-term forecast I Range of reports
o Quality figure n«Y
OUTCOME OF ADVANCE FORECASTS-- FINAL ESTIMATES ( I TO 7 DAYS AHEAD)
HIGH LATITUDE
ACTUAL
COMPARISON (SEE TEXT)
0 10 20 28
Vllb
COMMERCE STANDARDS BOULDER
Vile USEFUL FREQUENCY RANGES -- NORTH ATLANTIC PATH
FEBRUARY
C^UT 3 6 9 12 15 18 21 24
1965
COMMERCE STANDARDS BOULDER
USEFUL FREQUENCY RANGES ~ NORTH ATLANTIC PATH VI Id