Geomagnetism (eBook)

Front Cover 1
Geomagnetism 6
Copyright Page 7
Table of Contents 10
PART IV: GEOMAGNETISM—PART I 14
CHAPTER 1. INTRODUCTION–GENERAL REMARKS ON GEOMAGNETIC OBSERVATORIES 14
CHAPTER 2. THE TECHNIQUE OF SCALING INDICES K AND Q OF GEOMAGNETIC ACTIVITY 20
1 THE K-INDEX 20
2 THE Q-INDEX 25
CHAPTER 3. THE GEOMAGNETIC MEASURES FOR THE TIME-VARIATIONS OF SOLAR CORPUSCULAR RADIATION, DESCRIBED FOR USE IN CORRELATION STUDIES IN OTHER GEOPHYSICAL FIELDS 32
1 INTRODUCTION 32
2 INDICES FOR INDIVIDUAL STATIONS 33
3 INDICES OF THE WHOLE WORLD 37
4 SOURCES OF DATA 41
CHAPTER 4. INSTRUMENTAL EQUIPMENT FOR THE RECORDING OF SPACE GRADIENTS OF THE MAGNETIC ELEMENTS 42
1 INTRODUCTION 42
2 NOTE ON THE DETAILED EXPLORATION OF THE ELECTRIC CURRENT SYSTEMS THAT PRODUCE THE MORE LOCALLY DIFFERENTIATED GEOMAGNETIC VARIATIONS 43
3 A PRELIMINARY REPORT ON THE DIFFERENTIAL MAGNETOGRAPH 45
4 THE DIFFERENTIAL MAGNETOGRAPH FOR THE COLLEGE (ALASKA) MAGNETIC OBSERVATORY 47
PART V: GEOMAGNETISM—PART II 52
CHAPTER 1. INTRODUCTION 58
CHAPTER 2. ENQUETE SUR LES APPAREILS ENREGISTREURS DES VARIATIONS RAPIDES DU CHAMP MAGNÉTIQUE TERRESTRE 60
1 INTRODUCTION 60
2 PREMIERE FAMILLE: VARIOMÉTRES A AIMANTS 60
3 DEUXIÉME FAMILLE: MAGNÉTOGRAPHES A INDUCTION OU VARIOMÉTRES Ä BOBINE 72
4 TROISIÉME FAMILLE: SONDES A SATURATION 81
5 QUATRIÉME FAMILLE: VARIOMÉTRES A MULTIPLICATEUR DE CHAMP 83
CONCLUSIONS 84
CHAPTER 3. ELECTRONIC RECORDING OF THE TRANSIENT VARIATIONS IN THE EARTH'S MAGNETIC FIELD 86
1 INTRODUCTION 86
2 EQUIPMENT 86
3 CALIBRATION 88
4 OPERATION 88
5 ANALYSIS OF RECORDS 89
CHAPTER 4. LA METHODE "BARRE-FLUXMÉTRE" D'ENREGISTREMENT DES VARIATIONS MAGNÉTIQUE RAPIDES 92
1 GÉNÉRALITÉS 92
2 CHOIX DU NOYAU 93
3 DETERMINATION DES CARACTÉRISTIQUES D'ENROULEMENT (BODINAGE) 96
4 GALVANOMÉTRES—FLUXMÉTRES 97
5 MONTAGE DE L'INSTALLATION 99
6 DISPOSITIFS ENREGISTREURS 100
7 SUGGESTIONS SUR LES CONDITIONS D'UTILISATION DU MONTAGE "BARRE-FLUXMÉTRE" 100
8 RENSEIGNEMENTS PRATIQUES 101
ANNEXE I FORME GENÉRALE DES MÉRIDIENNES 103
ANNEXE II 104
ANNEXE III COMPARAISON ENTRE LES PROCEDES D'ENREGISTREMENT PHOTOGRAPHIQUES ET CEUX PAR SUIVEURS DE SPOT 105
CHAPTER 5. NOTE SOMMAIRE SUR LES VARIOMÉTRES ELECTROMAGNÉTIQUES 107
1 PRINCIPE 107
2 SENSIBILITÉS 107
3 LIMITES D'EMPLOI 107
CHAPTER 6. A FLU XMETER DEVICE FOR THE OBSERVATION OF RAPID SMALL CHANGES IN THE EARTH'S MAGNETIC FIELD 109
CHAPTER 7. CONSEILS, POUR L'ANNÉE GÉOPHYSIQUE, SUR L'INSTALLATION DE STATIONS D'ENREGISTREMENTDES VARIATIONS TELLURIQUES RAPIDES 113
1 INTRODUCTION 113
2 ELECTRODES 114
3 LIGNES TELLURIQUES 117
4 EQUIPEMENT DES LIGNES—GALVANOMÉTRES 118
5 ENREGISTREURS TELLURIQUES 121
6 UNIFICATION SOUHAITABLE DES CONVENTIONS 125
7 ETALONNAGE DES LIGNES TELLURIQUES 126
8 CHOIX DE L'EMPLACEMENT DE LA STATION TELLURIQUE 127
9 SUGGESTIONS ACCESSOIRES—ESSAIS RÉCENTS DE PERFECTIONNEMENTS 128
CHAPTER 8. EARTH-CURRENT INSTALLATIONS AT THE STATIONS OF THE USSR 131
1 INTRODUCTION 131
2 THE DISTRIBUTION OF THE USSR EARTH CURRENT STATIONS 132
3 DESCRIPTION OF EARTH CURRENT INSTALLATIONS 134
4 METHODS OF STUDYING THE EARTH-CURRENT RECORDS 152
PART VI: SEISMOLOGY 156
CHAPTER 1. PRESENTATION OF THE RESULTS OF SEISMOLOGICAL OBSERVATIONS 162
1.1 Bulletins from seismological stations 162
1.2 Observations and reduction of data of micro-seismic movements 163
1.3 Special observations 165
CHAPTER 2. RECOMMENDATIONS CONCERNING THE TRANSMISSION OF DATA TO THE WORLD CENTRES 165
CHAPTER 3. SEISMOLOGICAL CODES IN USE FOR THE TRANSMISSION OF THE DATA FROM THE SEISMOGRAMS 165
3.1 International code 166
3.2 Simplified US-CGS code 168
3.3 US-CGS code (1948) 168
PART VII: COSMIC RADIATION 170
CHAPTER 1. COSMIC-RADIATION NEUTRON INTENSITY MONITOR 176
FOREWORD 176
1. THE NEUTRON MONITOR PILE 177
2. ELECTRONIC CIRCUITS 182
3. REGISTRATION OF DATA 188
4. PROPORTIONAL COUNTERS 189
5. AUXILIARY EQUIPMENT 192
6. TEST EQUIPMENT 193
7. INSTALLATION OF NEUTRON MONITOR PILE 193
8. OPERATION AND MAINTENANCE 193
9. A SERIES OF MONITORS FOR OBSERVING C.R. SPECTRUM CHANGES 197
10. FACTORS CONTRIBUTING TO THE COUNTING RATE 199
11. CORRECTION OF DATA TO STANDARD ATMOSPHERIC PRESSURE 200
CHAPTER 2. STANDARD MESON INTENSITY RECORDER 201
GENERAL SPECIFICATION 202
SPECIFICATION (DETAILED) 203
1. G-M TUBE UNIT (2 OFF PER INSTALLATION) 203
2. COUNTER UNIT (2 OFF PER INSTALLATION) 204
3. COUNTER AND COINCIDENCE CIRCUIT POWER SUPPLY UNIT 204
4. INSTRUMENT PANEL 204
5. PHOTOGRAPHIC RECORDING EQUIPMENT 205
6. COUNTER RECORDING RACK 206
7. SPARES 206
NOTES ON CIRCUITS 207
CIRCUIT DIAGRAMS 214