The Earth’s passage of the April 11, 1997 coronal ejecta: geomagnetic field fluctuations at high and low latitude during northward interplanetary magnetic field conditions S. LepidiP. FranciaR. P. Lepping Original articles Pages: 1245 - 1250
Collisionless electrons in a thin high Mach number shock: dependence on angle and β M. GedalinE. Griv Original articles Pages: 1251 - 1259
Two types of ELF hiss observed at Varanasi, India D. K. SinghAshok K. SinghA. K. Singh Original articles Pages: 1260 - 1267
Ring current influence on auroral electrojet predictions H. GleisnerH. Lundstedt Original articles Pages: 1268 - 1275
How does the U-shaped potential close above the acceleration region? A study using Polar data P. JanhunenA. OlssonH. Laakso Original articles Pages: 1276 - 1283
Non-magnetic aspect sensitive auroral echoes from the lower E region observed at 50 MHz R. RüsterK. Schlegel Original articles Pages: 1284 - 1292
Changes of the first Schumann resonance frequency during relativistic solar proton precipitation in the 6 November 1997 event V. C. RolduginYe. P. MaltsevE. V. Vashenyuk Original articles Pages: 1293 - 1297
On the possible role of cusp/cleft precipitation in the formation of polar-cap patches I. K. WalkerJ. MoenD. A. Lorentzen Original articles Pages: 1298 - 1305
Observations of the response time of high-latitude ionospheric convection to variations in the interplanetary magnetic field using EISCAT and IMP-8 data H. KhanS. W. H. Cowley Original articles Pages: 1306 - 1335
Trends in the characteristics of the annual and semiannual variations observed in the radio wave absorption in the lower ionosphere J. LastovičkaD. Pancheva Original articles Pages: 1336 - 1343
Stratospheric background aerosol and polar cloud observations by laser backscattersonde within the framework of the European project “Stratospheric Regular Sounding” A. AdrianiF. CairoJ. P. Pommereau Original articles Pages: 1352 - 1360