Bureau of Standards Library, N.W. Bldg Reference book not to be … · Mtional Bureau of Standards...

Mtional Bureau of Standards

Library, N.W. Bldg

JUL S 1964

CRPL-F 238 PART B

Reference book not to be taken from the library.

FOR OFFICIAL USE

PART B

SOLAR - GEOPHYSICAL DATA

ISSUED

JUNE 1964

U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS

CENTRAL RADIO PROPAGATION LABORATORY BOULDER, COLORADO

CRPL-F 238

PART B

NATIONAL BUREAU OF STANDARDS CENTRAL RADIO PROPAGATION LABORATORY

BOULDER, COLORADO

Issued 30 June 1964

SOLAR-GEOPHYSICAL DATA

CONTENTS

I DAILY SOLAR INDICES

(a) Relative Sunspot Numbers and 2800 Mc/s Solar Flux - April - May 1964

(b) Graph of Sunspot Cycle

II SOLAR CENTERS OF ACTIVITY

(a-b) Calcium Plage and Sunspot Regions - May 1964

(c) Magnetic Classifications of Sunspots (Mt. Wilson) - May 1964

(d) Provisional Coronal Line Emission Indices - May 1964

III SOLAR FLARES

(a-f) Optical Observations - May 1964

(g) Flare Patrol Observations - May 1964

(h-i) Optical Observations - February 1964

(j) Flare Patrol Observations - February 1964

(k) Ionospheric Effects (SWF-SEA-SCNA-SPA-SES-SFD-Bursts) - April 1964

(l) 26 Mc/s - Riometer Events (South Pole) - April 1964

IV SOLAR RADIO WAVES

(a) 2800 Mc/s Outstanding Occurrences (ARO-Ottawa) - May 1964

(b) 169 Mc/s Interferometric Occurrences (Nangay) - May 1964

(c) 108 Mc/s Outstanding Occurrences (NBS-Boulder) - May 1964

(d) 7.6-41 Mc/s Spectral Observations (HAO-Boulder) - May 1964

(e-j) 9.1 cm Spectroheliograms (Stanford) - May 1964

V COSMIC RAY INDICES

(a) Climax Neutron Monitor - April 1964

(b) Deep River Neutron Monitor - April 1964

VI GEOMAGNETIC ACTIVITY INDICES

(a) C, Kp, Ap and Selected Quiet and Disturbed Days - April 1964

(b) Chart of Kp by Solar Rotations - 1963-1964

VII RADIO PROPAGATION QUALITY INDICES

(a) CRPL Quality Figures and Forecasts - North Atlantic and

North Pacific - April 1964

(b) Graphs Comparing Forecasts and Observed Quality - North Atlantic and

North Pacific - April 1964

(c-d) Graphs of Useful Frequency Ranges - North Atlantic - April 1964

VIII ALERT PERIODS

(a) IQSY Alert Periods - May 1964

The descriptive text was republished November 1963.

DAILY SOLAR INDICES

May

1964 Zurich Provisional Relative Sunspot

Numbers

RZ

Daily Values Solar Flux at 2800 Me, Ottawa, Canada

Flux

1 7 68.9 2 0 68.4

3 0 69.8 4 10 70.3 5 14 71.9

6 11 70.9 7 10 70.9 8 9 71.5 9 7 70.9

10 7 70.1

n 7 70.1 12 0 69.4 13 0 68.5 14 9 68.3 15 17 68.0

16 17 70.0 17 23 69.6 18 11 70.4 19 9 68.7 20 8 67.7

21 7 68.0 22 18 67.1 23 13 67.3 24 11 68.0 25 11 67.5

26 14 68.4 27 8 67.7 28 8 69.6 29 8 69.1 30 9 68.2 31 9 67.7

Mean; 9.4 69.1

Apr. 1964

American Relative Sunspot Numbers

Ra'

1 0 2 0

3 1 4 0

5 1

6 3

7 8 8 10

9 11 10 10

11 2 12 4

13 3 14 1

15 2

16 0

17 0 18 0

19 1 20 7

21 19 22 16 23 16 24 15 25 12

26 1

27 0 28 0 29 0 30 0

Mean: 4.8

COMMERCE STANDARDS BOULDER

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11 a CALCIUM PLAGE ANI) SUNSPOT REGIONS

MAY 1964

May

1964

LAT. MCMATH PLAGE

NUMBER

RETURN OF

REGION

CALCIUM PLAGE DATA SUNSPOT DATA CMP VALUES HISTORY AGE

(ROTA¬ TIONS)

DATE FIRST SEEN(i)

DURA¬ TION (OATU^

CMP VALUES HISTORY AREA INT AREA COUNT

1.1 N30 7258(2) New 200 1.5 b _ d i 5/1 1

1.9 N06 7255 7201 700 2 1 1 2 4/25 13

2.0 S38 7259 (2) New 100 1.5 b - d 1 5/1 1

2.2 S06 7267 (2) New 200 1 b - d 1 5/3 1

2.5 N25 7271 New (100) (2) b — d 1 5/5 2

2.8 S35 7260 (2) New 100 1.5 b - d 1 5/1 1

3.3 N12 7256 7204 300 2.5 1 1 2 4/26 13

3.5 S 17 7268 New 100 2 b d 1 5/4 2

4.3 N35 7265(3) New 200 2.5 b d 1 5/2 4

5.4 N34 7261 New 300 1 b — d 1 s5 /1 >5

5.4 NO 6 7274 New 200 2 b d 1 5/6 4

5.8 S02 7269 New 400 3 b 1 1 5/4 8 150 2 b ^ - 1

6.5 S 14 7262 (2) New (100) (1.5) 1 — d 1 5/1 1

6.7 S09 7278(2^) New 200 2.5 b — d 1 5/8 1

6.7 S08 7263 New 100 1 1 d 1 5/1 6

7.0 N04 7264 New 400 1.5 1 - d 1 5/1 7

7.8 S13 7275 (2) New 200 1.5 b - d 1 5/7 1

8.0 N24 7272 (2) New (100) (2) b - d 1 5/5 1

9.2 N39 7282 (2) New (100) (1.5) b ~ d 1 5/11 1

9.3 N17 7276 (4) New 200 1.5 b — d 1 5/7 3

10.8 S15 7270 New 300 1.5 1 d 1 5/4 8

11.1 N25 7273 7232 800 3 1 — 1 2 5/5 12

12 .2 N33 7280 (2) New (200) (2.5) b — d 1 5/10 1

12.2 S03 7283(2) New 200 2 b - d 1 5/11 1

12.4 N29 7284(2) New 200 1.5 b — d 1 5/11 1

13.2 S38 7290 (2) New (100) (1.5) b - 1 1 5/17 1

13 .5 NO 2 7287(6) New (300) (1.5) b d 1 5/15 2

14.2 Nil 7277 7222 400 1.5 1 — d 3 5/7 9

14.6 S44 7285 New 100 1.5 b - d 1 5/14 3

15.4 N13 7279 72 24 1000 3 1 — 1 5 5/9 13 20 4 b ' .d

16.0 S10 7281 New 100 1.5 1 d 1 5/10 5 16.6 N23 7292 (2) New 100 1.5 b — d 1 5/18 1

17.3 N29 7299(2) New (200) (1.5) b - d 1 5/21 1

17.5 S03 7293 New 100 1.5 b d 1 5/18 3 18.0 S02 7302 (2) New (100) (2) b — 1 1 5/22 1

18.2 N3 1 7296 New 200 1.5 b - d 1 5/19 3 19.5 N06 7286 New 800 3 1 1 1 5/14 12 70 6 b d 19.6 Sll 7303 New (200) (1.5) b d 1 5/22 2 19.8 S05 7291 New 100 1 b d 1 5/17 4 19.9 S09 7288(2) New (500) (1.5) b - d 1 5/15 1

20.0 S18 7289(2) New (300) (1) b — d 1 5/15 1 20.0 N48 7304(2) New (100) (1.5) b — d 1 5/22 1 (50) (2) b - d 21.0 S06 7312 (2) New (100) (1.5) b — d 1 5/24 1

21.2 N23 7311(2) New (200) (2) b - d 1 5/24 1

21.2 S20 7300 New 200 1.5 b d 1 5/21 2

COMMERCE STANDARDS BOULOER

CALCIUM PLAGE AND SUNSPOT REGIONS 11 b

MAY 1964

May

1964

LAT. MCMATH

PLAGE NUMBER

RETURN OF

REGION

CALCIUM PLAGE DATA SUNSPOT DATA CMP VALUES HISTORY AGE

(ROTA¬ TIONS)

DATE FIRST SEEN(i)

DURA¬ TION (DAY^)

CMP VALUES HISTORY AREA INT AREA COUNT

21.2 N29 7308(2) New (100) (1.5) b _ d i 5/23 1 21.3 N27 7294 (2) New (100) (1.5) b - d i 5/18 1

21.5 N05 7307 New (200) (2) b — d i 5/23 3 22.1 N20 7295 (2) New (100) (1.5) b — d i 5/18 1 22.1 Nil 7297 New 300 3.5 b 1 i 5/20 9 120 4 b - d

22.5 N68 7305 (2) New 100 1.5 b - d i 5/22 1

23.1 S10 7301 New 200 1.5 b — 1 i 5/21 6

23.3 N29 7315 (2) New (100) (1.5) b — d i 5/25 1

23.7 S44 7306 (2) New 400 1.5 b — d i 5/22 1

23.9 N41 7309 New 100 1.5 b - d i 5/23 2

25.5 S08 7317 New 200 1 b d i 5/27 3 26.0 N47 7318 (2) New 100 1.5 b - d i 5/27 1

26.5 NO 7 7298 New (500) (1) 1 - d i 5/20 3 27.0 S22 7325 New (300) (2) b d i 5/30 2 27.4 N32 7323(2) New (200) (1.5) b — d i 5/29 1

27.3 S50 7310 (2) New (400) (1) b — d i 5/23 1 27.6 N45 7321(2) New 200 1 b — d i 5/28 1

28.4 N14 7313 7255 300 1 1 — d 3 5/24 9 29.0 N18 7314(7) 7255 (200) (1) 1 d 3 5/24 2

29.3 S18 7326 New (100) (2) b — d 1 5/31 2

30.4 N16 7319 7256 600 1.5 1 — 1 3 5/24 13 30.6 S50 7322 (2) New (200) (1.5) b — d 1 5/28 1 31.3 S08 7320(2) New (200) (1.5) b - d 1 5/27 1 31.7 S27 7327(2) New 100 1.5 b — d 1 6/1 1 31.8 N28 7337(2) New (100) (1.5) b - d 1 6/4 1

COMMERCE - STANDARDS - BOULDER

(1) No calcium plage data were secured at the McMath-Hulbert Observatory on May 12 and 13, 1964.

(2) These very small and ephemeral plages last for only one day.

(3) New - Near position of 7216.

(4) New - In position of 7213.



(7) Part of 7255.

He MT. WILSON MAGNETIC CLASSIFICATIONS OF SUNSPOTS

MAY 1964

May 1964

TIME MEAS

UT

LAT MER

DIST

TYPE May 1964

TIME

MEAS UT

LAT MER

DIST TYPE

1-4 No Spots 19 2305 N07 W03 af

5-7 No Obs. 20-21 No Spots

8 2240 00 W50 ap* 22 2305 N12 W12 Pf

9 1755 00 W61 23 No Obs.

10-11 No Obs. 24 1555 N13 W35 Pf

12-13 No Spots 25-27 No Obs.

14 1605 N13 E10 P 28 2120 NO 5 E51 aP

15 1715 N14 W04 Pf 29 16 10 N05 E41 Pp

16 No Obs. 30 1445 NO 5 E28 aP

17 1740 N07 E27 P 31 1605 N05 E14 a?

18 2155 NO 7 E10 P


* As referred to Northern Hemisphere. Erratum: In CRPL-F 236B for April 1964 page lib, the sunspot reported by Mt. Wilson for March

17, 1964 should have been Nil E63 instead of Nil W63.

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INTERVALS OF NO FLARE PATROL OBSERVATIONS

MAY 1964

HOUR-UT

I 2 3 4 5 6 7 8 9 10 I I 12 13 14 15 16 17 18 19 20 21 22 23 24

i

COMMERCE - STANDARDS BOULDER

Arcetri

Capri-S (Swedish)

Duns ink

Haute-Provence

Huancayo

Ikomasan

Istanbul

Lockheed

Mitaka

McMath-Hulbert

Manila

Ondrej ov

Ottawa

Sacramento Peak

Ucc le

WendeIstein

FE

BR

UA

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FO

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19

20

2 I

22

23

24

25

26

27

28

29

INTERVALS OF NO FLARE PATROL OBSERVATIONS nij

KEItltl Ain 1961

HOUR-UT

I 2 3 4 5 6 7 8 9 10 I I 12 13 14 15 16 17 18 19 20 21 22 23 24

_

.Hil! 1

1

a

ITT! 1

bservatories included:

bastumani

rcetri

thenes

ucharest

apetown

apri-G (German)

Capri-S (Swedish)

Climax

Crimee

Duns ink

Haute-Provence

Herstmonceux

Huancayo

Ikomasan

Irkutsk

Istanbul

Kiev-KO

Kodaikanal

Locarno

Lockheed

Manila

M^Math-Hulbert

Mitaka

Nizamiah

Nizmir

Ondrejov

Ottawa

Sacramento Peak

Sydney

Tachkent

Thessaloniki

Ucc le

Voroshilov

Zurich

ink IONOSPHERIC EFFECTS OF SOLAR FLARES

SHORT WAVE RADIO FADEOUTS SUDDEN PHASE ANOMALIES SUDDEN COSMIC NOISE ABSORPTION SUDDEN ENHANCEMENTS OF SIGNAL

SUDDEN ENHANCEMENTS OF ATMOSPHERICS SUDDEN FREQUENCY DEVIATIONS SOLAR NOISE BURSTS AT 18 Mc/s

APRIL 1964

APR.

1964

UNIVERSAL TIME TYPE SWF IMP

IMPORTANCE

BUR

WIDE SPREAD INDEX

STATIONS KNOWN FLARE

START END MAX ABS SCNA SEA SPA SES SFD

1 3 1615 165 5 164S 5L 1 s HU BO FM MT

COMMERCE ■ STANDARDS BOULDER

RIOMETER EVENTS mi i

( Provisional)

APRIL 1964

South Pole 26 Mc/s

APR

1964

START

UT

ENO

UT

MAX.

UT

MAX,

ABSORP

db,

(tenths)

NO

OF

PEAKS

MAR.

1964

START

UT

END

UT

MAX

UT

MAX,

ABSORP

db,

(tenths)

NO

OF

PEAKS

1 * 16 0333 0417 0351 8 1

2 ** 16 1126 1634 1438 16 4

3 0048 2106 0531 49 9 17 VwW? 1034 0214 13 2

4 0309 2302 0318 91 4 18 1043 2031 1308 31 1

5 0054 0428 0100 102 1 19 0949 1938 1153 26 2

5 0712 0725 15 2 20 0125 1520 0226 61 4

6 0416 0502 0433 4 1 20 1649 1802 1720 6 1

6 1345 1756 1551 13 2 20 2250 0426 2310 19 2

6 2304 1751 2311 43 3 21 0956 1918 15 10 23 1

7 ** 22 **

8 0812 1649 1128 18 1 23 >wV

8 1927 2002 1937 4 1 24

9 0204 0419 0218 17 2 25 0131 0202 0136 7 1

9 0814 1737 1055 7 3 25 0837 1745 1346 8 1

10 0943 1653 1139 13 1 25 2318 2349 2320 9 1

11 1005 1702 1108 14 1 26 0054 1048 0304 10 3

12 ** 26 2323 1708 2353 87 3

13 >wV 27 /'wV

14 ** 28 0052 0112 86 2

15 1056 1817 1242 11 2 29 1740 0140 27 1

30 /'wV


* No Data ** No Event

*** Uncertain

IVa SOLAR RADIO EMISSION

OUTSTANDING OCCURRENCES

MAY I<M>1

ARO- OTTAWA 2800 Mc/s

MAY

U R DESCRIPTIVE START DURATION MEAN MAXIMUM

1964 A N E

TYPE UT HRS. MIN. FLUX TIME FLUX

REMARKS

None observed.

SO

LA

R

RA

DIO

EM

ISS

ION

IN

TE

RF

ER

OM

ET

RIC

OB

SE

RV

AT

ION

S

MA

Y 1

964

IVb

o CO

LD CM

O CM

LD

£ u UJ

MA

Y 1

964

IVc SOLAR RADIO EMISSION

OUTSTANDING OCCURRENCES

MAY 1964

NBS BOULDER 108 Me s

May 1964

TYPE START UT

TIME OF MAXIMUM

UT

DURATION MINUTES

INTENSITY

2 3 1529.8 1529.9 1.9 3

7 3 1429.9 1431.0 2.2 1

15 3 1615.8 1616.0 1.4 2

15 3 2004.8 2005.0 2.1 2

16 3 1259.0 1301.0 1.9 2

21 3 1146.5 1147.0 2.4 3

NOMINAL TIMES OF OBSERVATION

MAY 1964

NBS BOULDER 108 Mes

May 1964

HOURS OF OBSERVATION

U.T.

HOURS OF INTERFERENCE

U.T.

May 1964

HOURS OF OBSERVATION

U.T.

HOURS OF INTERFERENCE

U.T.

1 1205-0135 16 1149-0149 2 1204-0136 17 1148-0149 3 1203-0137 18 1147-0150 4 1202-0138 1201-1351; 19 1147-1910

1450-1902 20 1910-0152 5 1201-0139 1205-1700

21 1145-0153 6 1159-0140 22 1144-0154 7 1158-0141 23 1143-0154 8 1157-0142 24 1143-0155 9 1156-0143 25 1142-1829; 2341-2352

10 1155-0144 2058-0156

11 1154-0145 26 1141-0157 2000-2128 12 1153-0146 27 1141-0158 1847-1920; 13 1152-0146 2246-2320; 14 1151-0147 0130-0158 15 1150-0004; 28 1140-0158

0109-0148 29 1140-0158 1140-2140 30 1139-0159 31 1139-0159 0003-0027


SOLAR RADIO EMISSION SPECTRAL OBSERVATIONS

MAY 1961

High Altitude Observatory Boulder 7.6-41 Mc/s

Date Bursts May

1964 Type Time (U.T.) Inter- Frequency sity Range (Mc/s)

3 Hay III 1431-1431:30 1 18-34 7 III 1431-1432 1 l8-4l

COMMERCE - STANDARDS BOULDER

Erratum: 11 august 1963 evert at 2357:15-2417 is type II instead of continuum.

IVd

SO

LA

R

RA

DIO

EM

ISS

ION

SP

EC

TR

OH

EL

IO G

RA

MS

M

AY

1964

SO

LA

R

RA

DIO

EM

ISS

ION

SP

EC

TR

OH

EL

IO G

RA

MS

SO

LA

R

RA

DIO

EM

ISS

ION

SP

EC

TR

OH

EL

IO G

RA

MS

M

AY 1

96

4

IV,

SO

LA

R

RA

DIO

EM

ISS

ION

SP

EC

TR

OH

EL

IO G

RA

MS

!

e u IVj

Va COSMIC RAY INDICES

(Climax Neutron Monitor)

IGC Station B 305

APKIL 1964

Apr. 1964

DAILY

AVERAGE

COUNTS / HOUR*

Apr.

1964

DAILY

AVERAGE

COUNTS / HOUR*

1 3263.7** <40 16 3263.9 2 3293.1 17 3269.1 3 3283.4 18 3257.4 4 3280.7 19 3257.5 5 3289.0 20 3264.0** <40 6 3273.0 21 3262.5 7 3268.0 22 3269.5 8 3259.1 23 3273.4 9 3265.9 24 3267.9

10 3265.5 25 3270.8 11 3257.1 26 3275.4 12 3261.2 27 3276.9 13 3260.9 28 3258.1 14 3246.6 29 3262.8 15 3251.8 30 3268.9


* Scaling Factor 128 ** No. of Section Hours

CO

SM

IC

RA

Y

IND

ICE

S

Vb

CO

MM

ER

CE

- S

TA

ND

AR

DS

- B

OU

LD

ER

Via GEOMAGNETIC ACTIVITY INDICES

APRIL 1964

Apr. 1964

C Values Kp

Sura Ap Final

Selected Days

Three hour Gr. interval 1 2 3 4 5678

1 1.4 1- Oo 1- 1+ 3+ 6+ 6+ 7+ 26o 46 Five

2 1.3 5+ 4+ 3+ 3o 3- 4o 4+ 3+ 30+ 26 Quiet

3 1.1 4- 4+ 2+ 3+ 3+ 3+ 3- 3o 26o 18

4 0.6 4- 3o 3- 2- 2- 2o 1+ 3- 19- 11 12

5 0.6 2+ 3o 1+ 3- 1+ 2- 2+ 4o 19- 11 14 22

6 0.3 2+ 2o 1- lo 1- 1- 1+ 3o 12- 6 23

7 0.7 3o 2o 3o lo 2+ 2+ 3+ 2o 19o 10 24 8 0.8 3- 2o 3+ 4o 3o 2- 3+ 2+ 22+ 14

9 0.4 2+ 3+ 2- 2+ 2o 1+ 1- Oo 14- 7 10 0.2 1- 0+ 2- 3+ 1+ 0+ 0+ 1- 9- 5

11 0.7 Oo 1+ 2o 3o 5- 4- 3o 1+ 19o 14 Five 12 0.1 1- 1+ 1+ 0+ 0+ 1- 1- 2o 7+ 4 Disturbed

13 0.2 2- 2- lo 0+ 0+ 1+ 2- 2o lOo 5 14 0.1 2- 1- 0+ 2- 2o 1- 0+ 1- 80 4 1 15 0.6 lo 1- lo 3o 3o 2+ 1+ 3+ 16- 9 2

16 19

0.6 3+ 3- 2+ 1+ 3- 2+ 1+ 1+ 17+ 9 27 17 1.1 4o 4- 4o 3- 2+ 3o 2+ 2o 24o 16 28 18 1.1 0+ 1- 2o 4o 5o 5- 4- 3+ 24- 21 19 1.2 4o 3+ 2+ 5- 3+ 3+ 4- 4- 28+ 22 20 1.0 3o 2+ 4+ 2o 1+ 3- 3o 4o 22+ 15

21 0.6 4- 2- 1+ 2o 2- 1+ 2+ 2+ 16+ 9 Ten 22 0.0 0+ Oo 1- lo 0+ 0+ 1- 1- 4o 2 Quiet

23 0.0 1+ 1+ lo 0+ 0+ 0+ 1- lo 6+ 3 24 0.2 Oo 1- 0+ 2- 1- lo 1+ 1+ 7o 4 6 25 0.7 2- 1+ 2- 3+ 3+ 2o 3- 3+ 19+ 11 9

26 10

0.7 3- 4- 3o 2+ lo 2- 2o 2- 18 0 10 12 27 1.3 2+ 3- 3o 3o 3+ 5+ 5o 5- 29+ 26 13 28 1.4 5+ 5o 5o 5- 4- 2o 3+ 4o 33o 33 14 29 0.9 5o 3+ 2+ 2o 2+ 2o 4o lo 22o 16 15 30 0.8 1- 0+ 0+ 1- lo 3o 3+ 5- 14o 11 22

23 24

Mean: 0.69 Mean: 13

COMMERCE standards BOULDER

DA

YS

IN

SO

LA

R

RO

TA

TIO

N

INT

ER

VA

L

VIb

CO

MM

ER

CE

- S

TA

ND

AR

DS

Vila

T H X << b b -V1 © b

Z

x b

O i—i b

b

z ©

-< ©

© DC b

©

as

cc b

u in n M (\l (NJ H f\J t\J , n o h h m .—i cm 4 4 cm <m O O O nj »-h 4 4 <m (M

O -J in tn *—l (N 4 <M <M (Mi—I •—i (M *—i (M <t m 4 (\l oh h M M tn in 41 I

4 4 4 4 4 4 4 4 n- r- r^- (— r— r~- n- 4 4 vO >o r- r^- 4 4 4 4

4 4 4 irun 4 4 4 r- r- r— r~- r^- r— (— n- 4 4 4 4 f*^ i"-- i^- 4 4 4 4

44444 4 4 4 r^vot-f^-n- n r- o >o r^- r— n— n- >0 in m 4)

4 4 vO 44 vO »0 O O vO 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 in 4 4 4

4 4 in in 4 4 r- 4 4 44444 4 4 4 4 n 4 h 4 n n 4 4 4 4 4

4 m in in in 4 4 4 r~~- r— r— r— r— n- co 4 ( 1^- r— r— 4 4 cn 4

in in in in in in 4 4 4 4 44444 4 in 4 4 in 4 4 4 4 4 4 *4 -4 in in

in -j in in m 44444 44444 44444 r- 44 4 4 4 >4 4 4

r- 4 4 4 4 4 r- r- r— r^~ r~- r— r^- 4 r-- 4 r~- r^- 00 4 4 n-

4 m co *-h (\i 1—1 r\i nj i (M <m nj >4 4 (M nj .

■4 4 4 <M •—1 (M 4 (M <M f\| H H (\1 h (M 4 41 -4 4 f\J

14 (M 4 4 (M 4

i (NJ 4 4 4 4*

44444 44444 4 4 4 4 4 44444 44444 44444

44444 44444 44444 44444 44444 44444

+ + + +I III++ +0 + + + +1111 44444 44444 44444 44444

4 4 4 4 4

f'-4 4 4r--

4 4 4 4 4

4 4 4 4 4

4 4 4 4 4

f'~4 4n-h-

4 4 4 4 4

4 4 4 4 4

4 h r- h iv-4444 4 4 4 f'- 4 44444

r- r— r— r^- r— f^-4444 h- 4 r^- r— 44444

44444 44444 44444 44444

44444 44444 44444 44444

+ l + + l till 1 l + + 1 + + l + 1 4 4 4 r- 4 ^ 1 n- r- 4 4 4 4 4 h- 4 4 44444

1111 + C" 4 4 r^- 4

44444

l l l 1 o 1 + + + + r— r— r~- f— r~- n- 4 4 4 4

I + o I o I + O O I 44444 44444 44444

O O I + I 4 4 4 4 4

r^*-jOO 0*-*0r-i

CM 4 O O CNIOOO

4 CM * (NJ OOOO

no h 4000

4 0 0 0

cor^oo 0000

4 4 0 0 CM

4 4 0 0

0 4 0 0 CM

0^00

4 o O

CM CM O O

CH CO O b

QU

AL

ITY

QU

AL

ITY

QU

AL

ITY

CRPL RADIO PROPAGATION QUALITY FIGURES AND FORECASTS VII b

NORTH ATLANTIC

APRIL 1964 — Short-term forecast I Range of reports

o Quality figure

OUTCOME OF ADVANCE FORECASTS--FINAL ESTIMATES (I TO 7 DAYS AHEAD)

v.wm

sH «□

DISTURBED

—

NORTH PACIFIC

QUIET

ACTUAL

COMPARISON (SEE TEXT)

P

S

u

F

a m □

0 COMMERCE STANDARDS BOULDER

Vile USEFUL FREQUENCY RANGES - NORTH ATLANTIC PATH

APRIL 1964

tfuT 3 6 9 12 15 18 21 24


USEFUL FREQUENCY RANGES ~ NORTH ATLANTIC PATH Vlld

APRIL 1961

OhUT 3 6 9 12 15 18 21 24 C^UT 3 6 9 12 15 18 21 24

Adapted from Observations by Deutsches Bundespost

Villa IQSY ALERT PERIODS

INTERNATIONAL URSIGRAM AND WORLD DAYS SERVICE

MAY 1964

MAY

1964

TIME

OF ISSUE

UT

ADVANCE GEOPHYSICAL ALERT

WORLDWIDE GEOPHYSICAL ALERT

NO. TYPE TIMING ELABORATION

1 0400 65 Solar Calm Exists



9 0400 68 Magnetic Calm Exists

15 0400 69 Magnetic Storm Exists

15 1250 Ft. Belvoir, Magnetic Storm

13/12XXZ

16 0400 70 Magnetic Storm Exists

20 1810 Climax, Solar Flare 20/13302

24 0400 71 Magnetic Storm Expected

25 0400 72 Magnetic Storm Expected

CCMC ST*NO**06 ■ KJULOt*

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